CVE-2026-46327

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However, this function is called without\nholding any locks, so the device may be suspended just after it.\n\nMove the call to dm_suspended_md after dm_get_live_table, so that the\ndevice can't be suspended after the suspended state was tested."}], "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 code is reached only through local block-layer ioctls (BLKREPORTZONE/BLKREPORTZONEV2 via blkdev_report_zones_ioctl) and device-mapper control ioctls that trigger dm_swap_table/dm_revalidate_zones; there is no network-facing entry point.\nAC:L - Exploitation is a TOCTOU race between concurrent BLKREPORTZONE calls and a zoned dm table activation/revalidation; an attacker can control both sides by running parallel threads and retrying until the window is hit, without depending on uncontrollable timing or memory layout.\nPR:L - Triggering dm table load/swap and zone revalidation requires CAP_SYS_ADMIN, which is obtainable by an unprivileged user inside a user namespace (unshare -Urn); BLKREPORTZONE additionally requires read access to the dm block device, which the same attacker can grant when creating the device.\nUI:N - No victim interaction is required once the attacker has the needed privileges and device access; the race can be driven entirely by attacker-controlled ioctl threads during dm-crypt zoned table setup.\nS:U - The use-after-free corrupts kernel heap metadata and zone-write-plug structures within kernel memory; it does not cross a VM, container, or IOMMU security boundary to affect a separate authority.\nC:H - The bug revives the CVE-2025-38141 class use-after-free where disk_free_zone_resources() can free zone_wplugs_hash/zones_cond while dm_blk_report_zones() still reads them through the live table path, enabling disclosure of freed kernel heap contents.\nI:H - Use-after-free on zone write plug and zone-condition structures provides attacker-influencable heap corruption primitives that can be developed into arbitrary kernel memory writes or control-flow hijack, not merely a bounded modification.\nA:H - Concurrent access to freed zone resources during failed blk_revalidate_disk_zones() can cause kernel oops/panic from dereferencing freed zone_wplugs_hash, zones_cond, or related structures, even when full exploitation is not attempted."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-zone.c"], "versions": [{"version": "f9c1bdf24615303d48a2d0fd629c88f3189563aa", "lessThan": "175ac0a6115400278d3900f5a04a58b17b3f6cd0", "status": "affected", "versionType": "git"}, {"version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e", "lessThan": "7a3385e97af2b6f485fef11e82d8c29adee4be93", "status": "affected", "versionType": "git"}, {"version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e", "lessThan": "d809a36692ee1394cac85ce6ba7cf8ea58da5812", "status": "affected", "versionType": "git"}, {"version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e", "lessThan": "24c405fdbe215c45e57bba672cc42859038491ee", "status": "affected", "versionType": "git"}, {"version": "d19bc1b4dd5f322980b1f05f79b2ea4f0db10920", "status": "affected", "versionType": "git"}, {"version": "6.12.34", "lessThan": "6.12.75", "status": "affected", "versionType": "semver"}, {"version": "6.15.3", "lessThan": "6.16", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-zone.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "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": "6.12.34", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/175ac0a6115400278d3900f5a04a58b17b3f6cd0"}, {"url": "https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93"}, {"url": "https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812"}, {"url": "https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee"}], "title": "dm: fix unlocked test for dm_suspended_md", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46327", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:22:16.430684Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:36:58.906Z"}}]}}

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there is no network-facing entry point.\nAC:L - Exploitation is a TOCTOU race between concurrent BLKREPORTZONE calls and a zoned dm table activation/revalidation; an attacker can control both sides by running parallel threads and retrying until the window is hit, without depending on uncontrollable timing or memory layout.\nPR:L - Triggering dm table load/swap and zone revalidation requires CAP_SYS_ADMIN, which is obtainable by an unprivileged user inside a user namespace (unshare -Urn); BLKREPORTZONE additionally requires read access to the dm block device, which the same attacker can grant when creating the device.\nUI:N - No victim interaction is required once the attacker has the needed privileges and device access; the race can be driven entirely by attacker-controlled ioctl threads during dm-crypt zoned table setup.\nS:U - The use-after-free corrupts kernel heap metadata and zone-write-plug structures within kernel memory; it does not cross a VM, container, or IOMMU security boundary to affect a separate authority.\nC:H - The bug revives the CVE-2025-38141 class use-after-free where disk_free_zone_resources() can free zone_wplugs_hash/zones_cond while dm_blk_report_zones() still reads them through the live table path, enabling disclosure of freed kernel heap contents.\nI:H - Use-after-free on zone write plug and zone-condition structures provides attacker-influencable heap corruption primitives that can be developed into arbitrary kernel memory writes or control-flow hijack, not merely a bounded modification.\nA:H - Concurrent access to freed zone resources during failed blk_revalidate_disk_zones() can cause kernel oops/panic from dereferencing freed zone_wplugs_hash, zones_cond, or related structures, even when full exploitation is not attempted."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "f9c1bdf24615303d48a2d0fd629c88f3189563aa", "lessThan": "175ac0a6115400278d3900f5a04a58b17b3f6cd0", "versionType": "git"}, {"status": "affected", "version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e", "lessThan": "7a3385e97af2b6f485fef11e82d8c29adee4be93", "versionType": "git"}, {"status": "affected", "version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e", "lessThan": "d809a36692ee1394cac85ce6ba7cf8ea58da5812", "versionType": "git"}, {"status": "affected", "version": "37f53a2c60d03743e0eacf7a0c01c279776fef4e", "lessThan": "24c405fdbe215c45e57bba672cc42859038491ee", "versionType": "git"}, {"status": "affected", "version": "d19bc1b4dd5f322980b1f05f79b2ea4f0db10920", "versionType": "git"}, {"status": "affected", "version": "6.12.34", "lessThan": "6.12.75", "versionType": "semver"}, {"status": "affected", "version": "6.15.3", "lessThan": "6.16", "versionType": "semver"}], "programFiles": ["drivers/md/dm-zone.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"status": "unaffected", "version": "0", "lessThan": "6.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.14", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.4", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/md/dm-zone.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/175ac0a6115400278d3900f5a04a58b17b3f6cd0"}, {"url": "https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93"}, {"url": "https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812"}, {"url": "https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix unlocked test for dm_suspended_md\n\nThe function dm_blk_report_zones tests if the device is suspended with\nthe \"dm_suspended_md\" call. However, this function is called without\nholding any locks, so the device may be suspended just after it.\n\nMove the call to dm_suspended_md after dm_get_live_table, so that the\ndevice can't be suspended after the suspended state was tested."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.12.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.15.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:31:22.716Z"}}}, "cveMetadata": {"cveId": "CVE-2026-46327", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:36:58.906Z", "dateReserved": "2026-05-13T15:03:33.112Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-06-09T12:25:54.781Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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However, this function is called without\nholding any locks, so the device may be suspended just after it.\n\nMove the call to dm_suspended_md after dm_get_live_table, so that the\ndevice can't be suspended after the suspended state was tested."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndm: correcci\u00f3n de la prueba sin bloqueo para dm_suspended_md\n\nLa funci\u00f3n dm_blk_report_zones comprueba si el dispositivo est\u00e1 suspendido con la llamada a 'dm_suspended_md'. Sin embargo, esta funci\u00f3n es llamada sin mantener ning\u00fan bloqueo, por lo que el dispositivo puede ser suspendido justo despu\u00e9s de ella.\n\nMover la llamada a dm_suspended_md despu\u00e9s de dm_get_live_table, para que el dispositivo no pueda ser suspendido despu\u00e9s de que se comprobara el estado de suspensi\u00f3n."}], "id": "CVE-2026-46327", "lastModified": "2026-10-19T20:18:44.227", "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-2026-46327", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:22:16.430684Z", "version": "2.0.3"}}]}, "published": "2026-06-09T14:16:42.400", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/175ac0a6115400278d3900f5a04a58b17b3f6cd0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: dm: fix unlocked test for dm_suspended_md", "id": "2486994", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486994"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel's device mapper (dm) component. The `dm_blk_report_zones` function performs a check for the device's suspended state without proper locking. This allows the device to enter a suspended state immediately after the check, leading to an inconsistent state. This inconsistency could potentially result in unexpected system behavior or a denial of service (DoS) condition."], "name": "CVE-2026-46327", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46327\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46327\nhttps://lore.kernel.org/linux-cve-announce/2026060909-CVE-2026-46327-aaef@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c1bdf24615303d48a2d0fd629c88f3189563aa,175ac0a6115400278d3900f5a04a58b17b3f6cd0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37f53a2c60d03743e0eacf7a0c01c279776fef4e,7a3385e97af2b6f485fef11e82d8c29adee4be93)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37f53a2c60d03743e0eacf7a0c01c279776fef4e,d809a36692ee1394cac85ce6ba7cf8ea58da5812)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37f53a2c60d03743e0eacf7a0c01c279776fef4e,24c405fdbe215c45e57bba672cc42859038491ee)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d19bc1b4dd5f322980b1f05f79b2ea4f0db10920"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.34,6.12.75)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.15.3,6.16)"}}], "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": "affected", "versions": {"scheme": "semver", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"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": "2026-06-09T15:00:07.923919+00:00", "updated": "2026-10-23T01:00:18.695181+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}