CVE-2026-43278

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43278", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.998Z", "datePublished": "2026-05-06T11:29:00.193Z", "dateUpdated": "2026-10-19T19:16:25.598Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:00.162Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: clear cloned request bio pointer when last clone bio completes\n\nStale rq->bio values have been observed to cause double-initialization of\ncloned bios in request-based device-mapper targets, leading to\nuse-after-free and double-free scenarios.\n\nOne such case occurs when using dm-multipath on top of a PCIe NVMe\nnamespace, where cloned request bios are freed during\nblk_complete_request(), but rq->bio is left intact. Subsequent clone\nteardown then attempts to free the same bios again via\nblk_rq_unprep_clone().\n\nThe resulting double-free path looks like:\n\n nvme_pci_complete_batch()\n nvme_complete_batch()\n blk_mq_end_request_batch()\n blk_complete_request() // called on a DM clone request\n bio_endio() // first free of all clone bios\n ...\n rq->end_io() // end_clone_request()\n dm_complete_request(tio->orig)\n dm_softirq_done()\n dm_done()\n dm_end_request()\n blk_rq_unprep_clone() // second free of clone bios\n\nFix this by clearing the clone request's bio pointer when the last cloned\nbio completes, ensuring that later teardown paths do not attempt to free\nalready-released bios."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable request-based device-mapper path is reached by local block I/O, such as reads or writes to a filesystem backed by dm-multipath. It is not itself a network protocol handler, even though network services may indirectly generate disk I/O.\nAC:L - On an affected request-based dm-multipath stack over blk-mq/NVMe, ordinary I/O can drive the deterministic completion path that frees the clone bios and then tears down the clone. No attacker-uncontrolled race is required.\nPR:L - Creating or reconfiguring DM devices requires CAP_SYS_ADMIN, but triggering the bug only requires the ability to issue I/O to an existing affected mapped device, for example through files the local user can read or write. Thus a basic unprivileged local user can reach the vulnerable path.\nUI:N - The attacker can trigger the I/O directly through their own syscalls. No separate victim action is required.\nS:U - The impact remains within the kernel/host security authority. This is a standard local kernel memory-corruption issue, not a VM escape or cross-authority boundary bypass.\nC:H - The stale cloned bio pointer causes use-after-free/double-free of kernel heap objects from the DM bioset. Per kernel CVSS guidance, such memory corruption is treated as capable of enabling high-impact information disclosure.\nI:H - The double-free/use-after-free can corrupt allocator state or allow overlapping/reused kernel objects, which is defensibly exploitable for arbitrary memory modification or code execution. Per guidance, UAF/double-free memory corruption warrants high integrity impact.\nA:H - Even without full exploitation, the double-free/use-after-free can trigger kernel memory corruption, oops, or panic during I/O completion. Repeated attacker-controlled I/O can repeatedly hit the vulnerable path."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-rq.c"], "versions": [{"version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "8d9ddad561136f7e6a9346767bf97b4d79e38e67", "status": "affected", "versionType": "git"}, {"version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "7daf279c674d515fb22a727a7bbc92aeb35c5442", "status": "affected", "versionType": "git"}, {"version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "e2e738e8dfbbf83bd2bae0467ec4420cc52da42a", "status": "affected", "versionType": "git"}, {"version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "b1c1a2637ebd675aa2d71fee8c70da8791d73850", "status": "affected", "versionType": "git"}, {"version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "83d72091804600ead96dc9e9f518ea56cb4942f6", "status": "affected", "versionType": "git"}, {"version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "fb8a6c18fb9a6561f7a15b58b272442b77a242dd", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-rq.c"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8d9ddad561136f7e6a9346767bf97b4d79e38e67"}, {"url": "https://git.kernel.org/stable/c/7daf279c674d515fb22a727a7bbc92aeb35c5442"}, {"url": "https://git.kernel.org/stable/c/e2e738e8dfbbf83bd2bae0467ec4420cc52da42a"}, {"url": "https://git.kernel.org/stable/c/b1c1a2637ebd675aa2d71fee8c70da8791d73850"}, {"url": "https://git.kernel.org/stable/c/83d72091804600ead96dc9e9f518ea56cb4942f6"}, {"url": "https://git.kernel.org/stable/c/fb8a6c18fb9a6561f7a15b58b272442b77a242dd"}], "title": "dm: clear cloned request bio pointer when last clone bio completes", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43278", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:11.058094Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-415", "description": "CWE-415 Double Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:16:25.598Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43278", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:11.058094Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-415", "description": "CWE-415 Double Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:16:11.588Z"}}], "cna": {"title": "dm: clear cloned request bio pointer when last clone bio completes", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable request-based device-mapper path is reached by local block I/O, such as reads or writes to a filesystem backed by dm-multipath. It is not itself a network protocol handler, even though network services may indirectly generate disk I/O.\nAC:L - On an affected request-based dm-multipath stack over blk-mq/NVMe, ordinary I/O can drive the deterministic completion path that frees the clone bios and then tears down the clone. No attacker-uncontrolled race is required.\nPR:L - Creating or reconfiguring DM devices requires CAP_SYS_ADMIN, but triggering the bug only requires the ability to issue I/O to an existing affected mapped device, for example through files the local user can read or write. Thus a basic unprivileged local user can reach the vulnerable path.\nUI:N - The attacker can trigger the I/O directly through their own syscalls. No separate victim action is required.\nS:U - The impact remains within the kernel/host security authority. This is a standard local kernel memory-corruption issue, not a VM escape or cross-authority boundary bypass.\nC:H - The stale cloned bio pointer causes use-after-free/double-free of kernel heap objects from the DM bioset. Per kernel CVSS guidance, such memory corruption is treated as capable of enabling high-impact information disclosure.\nI:H - The double-free/use-after-free can corrupt allocator state or allow overlapping/reused kernel objects, which is defensibly exploitable for arbitrary memory modification or code execution. Per guidance, UAF/double-free memory corruption warrants high integrity impact.\nA:H - Even without full exploitation, the double-free/use-after-free can trigger kernel memory corruption, oops, or panic during I/O completion. Repeated attacker-controlled I/O can repeatedly hit the vulnerable path."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "8d9ddad561136f7e6a9346767bf97b4d79e38e67", "versionType": "git"}, {"status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "7daf279c674d515fb22a727a7bbc92aeb35c5442", "versionType": "git"}, {"status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "e2e738e8dfbbf83bd2bae0467ec4420cc52da42a", "versionType": "git"}, {"status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "b1c1a2637ebd675aa2d71fee8c70da8791d73850", "versionType": "git"}, {"status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "83d72091804600ead96dc9e9f518ea56cb4942f6", "versionType": "git"}, {"status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "lessThan": "fb8a6c18fb9a6561f7a15b58b272442b77a242dd", "versionType": "git"}], "programFiles": ["drivers/md/dm-rq.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"status": "unaffected", "version": "0", "lessThan": "6.1", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.165", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.128", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.16", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.6", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/md/dm-rq.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/8d9ddad561136f7e6a9346767bf97b4d79e38e67"}, {"url": "https://git.kernel.org/stable/c/7daf279c674d515fb22a727a7bbc92aeb35c5442"}, {"url": "https://git.kernel.org/stable/c/e2e738e8dfbbf83bd2bae0467ec4420cc52da42a"}, {"url": "https://git.kernel.org/stable/c/b1c1a2637ebd675aa2d71fee8c70da8791d73850"}, {"url": "https://git.kernel.org/stable/c/83d72091804600ead96dc9e9f518ea56cb4942f6"}, {"url": "https://git.kernel.org/stable/c/fb8a6c18fb9a6561f7a15b58b272442b77a242dd"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: clear cloned request bio pointer when last clone bio completes\n\nStale rq->bio values have been observed to cause double-initialization of\ncloned bios in request-based device-mapper targets, leading to\nuse-after-free and double-free scenarios.\n\nOne such case occurs when using dm-multipath on top of a PCIe NVMe\nnamespace, where cloned request bios are freed during\nblk_complete_request(), but rq->bio is left intact. Subsequent clone\nteardown then attempts to free the same bios again via\nblk_rq_unprep_clone().\n\nThe resulting double-free path looks like:\n\n nvme_pci_complete_batch()\n nvme_complete_batch()\n blk_mq_end_request_batch()\n blk_complete_request() // called on a DM clone request\n bio_endio() // first free of all clone bios\n ...\n rq->end_io() // end_clone_request()\n dm_complete_request(tio->orig)\n dm_softirq_done()\n dm_done()\n dm_end_request()\n blk_rq_unprep_clone() // second free of clone bios\n\nFix this by clearing the clone request's bio pointer when the last cloned\nbio completes, ensuring that later teardown paths do not attempt to free\nalready-released bios."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.165", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "6.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:00.162Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43278", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:16:25.598Z", "dateReserved": "2026-05-01T14:12:55.998Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-06T11:29:00.193Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/md/dm-rq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8d9ddad561136f7e6a9346767bf97b4d79e38e67", "status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "versionType": "git"}, {"lessThan": "7daf279c674d515fb22a727a7bbc92aeb35c5442", "status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "versionType": "git"}, {"lessThan": "e2e738e8dfbbf83bd2bae0467ec4420cc52da42a", "status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "versionType": "git"}, {"lessThan": "b1c1a2637ebd675aa2d71fee8c70da8791d73850", "status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "versionType": "git"}, {"lessThan": "83d72091804600ead96dc9e9f518ea56cb4942f6", "status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "versionType": "git"}, {"lessThan": "fb8a6c18fb9a6561f7a15b58b272442b77a242dd", "status": "affected", "version": "ab3e1d3bbab9e973aeb4dd4603251578658a47ff", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/md/dm-rq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"lessThan": "6.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.165", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.128", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.75", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.16", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "96EF3286-5BCE-4D88-B8C9-4292E5BA7A18", "versionEndExcluding": "6.1.165", "versionStartIncluding": "6.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: clear cloned request bio pointer when last clone bio completes\n\nStale rq->bio values have been observed to cause double-initialization of\ncloned bios in request-based device-mapper targets, leading to\nuse-after-free and double-free scenarios.\n\nOne such case occurs when using dm-multipath on top of a PCIe NVMe\nnamespace, where cloned request bios are freed during\nblk_complete_request(), but rq->bio is left intact. Subsequent clone\nteardown then attempts to free the same bios again via\nblk_rq_unprep_clone().\n\nThe resulting double-free path looks like:\n\n nvme_pci_complete_batch()\n nvme_complete_batch()\n blk_mq_end_request_batch()\n blk_complete_request() // called on a DM clone request\n bio_endio() // first free of all clone bios\n ...\n rq->end_io() // end_clone_request()\n dm_complete_request(tio->orig)\n dm_softirq_done()\n dm_done()\n dm_end_request()\n blk_rq_unprep_clone() // second free of clone bios\n\nFix this by clearing the clone request's bio pointer when the last cloned\nbio completes, ensuring that later teardown paths do not attempt to free\nalready-released bios."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndm: borrar el puntero bio de la solicitud clonada cuando el \u00faltimo bio clonado se completa\n\nSe ha observado que los valores obsoletos de rq -> bio causan la doble inicializaci\u00f3n de bios clonados en objetivos de device-mapper basados en solicitudes, lo que lleva a escenarios de uso despu\u00e9s de liberaci\u00f3n y doble liberaci\u00f3n.\n\nUno de esos casos ocurre al usar dm-multipath sobre un espacio de nombres NVMe PCIe, donde los bios de solicitud clonados se liberan durante blk_complete_request(), pero rq -> bio se deja intacto. La posterior desmantelaci\u00f3n del clon luego intenta liberar los mismos bios de nuevo a trav\u00e9s de blk_rq_unprep_clone().\n\nLa ruta de doble liberaci\u00f3n resultante se ve as\u00ed:\n\n nvme_pci_complete_batch()\n nvme_complete_batch()\n blk_mq_end_request_batch()\n blk_complete_request() // llamada en una solicitud de clonaci\u00f3n de DM\n bio_endio() // primera liberaci\u00f3n de todos los bios clonados\n ...\n rq -> end_io() // end_clone_request()\n dm_complete_request(tio -> orig)\n dm_softirq_done()\n dm_done()\n dm_end_request()\n blk_rq_unprep_clone() // segunda liberaci\u00f3n de bios clonados\n\nSolucione esto borrando el puntero bio de la solicitud de clonaci\u00f3n cuando el \u00faltimo bio clonado se completa, asegurando que las rutas de desmantelamiento posteriores no intenten liberar bios ya liberados."}], "id": "CVE-2026-43278", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43278", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:16:11.058094Z", "version": "2.0.3"}}]}, "published": "2026-05-06T12:16:49.213", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7daf279c674d515fb22a727a7bbc92aeb35c5442"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/83d72091804600ead96dc9e9f518ea56cb4942f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8d9ddad561136f7e6a9346767bf97b4d79e38e67"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b1c1a2637ebd675aa2d71fee8c70da8791d73850"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e2e738e8dfbbf83bd2bae0467ec4420cc52da42a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fb8a6c18fb9a6561f7a15b58b272442b77a242dd"}, {"source": "nvd@nist.gov", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d746b639be4b4f5cd8ce2b06aa52dc443f50edc"}, {"source": "nvd@nist.gov", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9a95b98202113045bc1a5bcb30388a500f25e050"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-415"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: dm: clear cloned request bio pointer when last clone bio completes", "id": "2467171", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467171"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's device-mapper (dm) component, specifically affecting request-based device-mapper targets like dm-multipath. Stale bio pointers in cloned requests can lead to double-initialization and subsequent double-free scenarios of cloned bios. This memory corruption vulnerability could potentially allow a local attacker to cause a denial of service or escalate privileges."], "name": "CVE-2026-43278", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43278\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43278\nhttps://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43278-95fa@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3d746b639be4b4f5cd8ce2b06aa52dc443f50edc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,9a95b98202113045bc1a5bcb30388a500f25e050)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8d9ddad561136f7e6a9346767bf97b4d79e38e67)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,7daf279c674d515fb22a727a7bbc92aeb35c5442)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e2e738e8dfbbf83bd2bae0467ec4420cc52da42a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b1c1a2637ebd675aa2d71fee8c70da8791d73850)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,83d72091804600ead96dc9e9f518ea56cb4942f6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,fb8a6c18fb9a6561f7a15b58b272442b77a242dd)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.252,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.202,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.165,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.128,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.75,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.16,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.6,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T16:00:06.454739+00:00", "updated": "2026-05-08T21:00:10.210106+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}