CVE-2026-93264

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93264", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.097Z", "datePublished": "2026-09-24T15:52:03.741Z", "dateUpdated": "2026-10-19T09:08:17.409Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:08:17.409Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/efa: Fix PBL chunk length computation\n\nOn register MR, when creating the PBL, if it's an indirect PBL we create\na chunk list to hold the PBL pages pointers. Each chunk is 4KB in size\nand can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte\ncontrol buffer at the end of it holding the next chunk's pointer and its\nlength.\n\nIf the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the\ncalculated last chunk length is wrongly computed as 0, even though that\nchunk is fully populated with 510 real page pointers. This wrong length\nis used both to DMA map the chunk and is propagated to the device,\ncausing the device to see the chunk as empty and reject the memory\nregistration.\n\nFix the calculation so it will be performed only if the number of pages\nisn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in\nthe above loop correctly.\nAlso prevent out-of-bounds reach in the chunks array in such scenario."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/efa/efa_verbs.c"], "versions": [{"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "665cd418b8561a099c3854443f8ad8ae751b72a0", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "932e5684906a090644a9061fae2d254041c3b8f2", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "489b28f2377afa70c18c45b06a6387f3d39bb123", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "aadf3f9b5edb7f0a77e9172b237d2e07c754829c", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "3982714e15512b83115897806dacc94899683420", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "da7805f0211af19968584e621074f253ac07dba7", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "1d4b5902773475fc97151379b7e5f09cad0fa57b", "status": "affected", "versionType": "git"}, {"version": "40909f664d279765af430acc5db348a0b71c9b0a", "lessThan": "229b42d7450c1cf96f45ec39ebb69211b06bc036", "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/infiniband/hw/efa/efa_verbs.c"], "versions": [{"version": "5.2", "status": "affected"}, {"version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.2", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/1d4b5902773475fc97151379b7e5f09cad0fa57b"}, {"url": "https://git.kernel.org/stable/c/229b42d7450c1cf96f45ec39ebb69211b06bc036"}], "title": "RDMA/efa: Fix PBL chunk length computation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/efa/efa_verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "665cd418b8561a099c3854443f8ad8ae751b72a0", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "932e5684906a090644a9061fae2d254041c3b8f2", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "489b28f2377afa70c18c45b06a6387f3d39bb123", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "aadf3f9b5edb7f0a77e9172b237d2e07c754829c", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "3982714e15512b83115897806dacc94899683420", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "da7805f0211af19968584e621074f253ac07dba7", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "1d4b5902773475fc97151379b7e5f09cad0fa57b", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}, {"lessThan": "229b42d7450c1cf96f45ec39ebb69211b06bc036", "status": "affected", "version": "40909f664d279765af430acc5db348a0b71c9b0a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/efa/efa_verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.2"}, {"lessThan": "5.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/efa: Fix PBL chunk length computation\n\nOn register MR, when creating the PBL, if it's an indirect PBL we create\na chunk list to hold the PBL pages pointers. Each chunk is 4KB in size\nand can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte\ncontrol buffer at the end of it holding the next chunk's pointer and its\nlength.\n\nIf the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the\ncalculated last chunk length is wrongly computed as 0, even though that\nchunk is fully populated with 510 real page pointers. This wrong length\nis used both to DMA map the chunk and is propagated to the device,\ncausing the device to see the chunk as empty and reject the memory\nregistration.\n\nFix the calculation so it will be performed only if the number of pages\nisn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in\nthe above loop correctly.\nAlso prevent out-of-bounds reach in the chunks array in such scenario."}], "id": "CVE-2026-93264", "lastModified": "2026-10-19T10:17:17.760", "metrics": {}, "published": "2026-09-24T16:17:23.193", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d4b5902773475fc97151379b7e5f09cad0fa57b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/229b42d7450c1cf96f45ec39ebb69211b06bc036"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3982714e15512b83115897806dacc94899683420"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/489b28f2377afa70c18c45b06a6387f3d39bb123"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/665cd418b8561a099c3854443f8ad8ae751b72a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/932e5684906a090644a9061fae2d254041c3b8f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aadf3f9b5edb7f0a77e9172b237d2e07c754829c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da7805f0211af19968584e621074f253ac07dba7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RDMA/efa: Fix PBL chunk length computation", "id": "2540367", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540367"}, "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-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/efa: Fix PBL chunk length computation\nOn register MR, when creating the PBL, if it's an indirect PBL we create\na chunk list to hold the PBL pages pointers. Each chunk is 4KB in size\nand can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte\ncontrol buffer at the end of it holding the next chunk's pointer and its\nlength.\nIf the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the\ncalculated last chunk length is wrongly computed as 0, even though that\nchunk is fully populated with 510 real page pointers. This wrong length\nis used both to DMA map the chunk and is propagated to the device,\ncausing the device to see the chunk as empty and reject the memory\nregistration.\nFix the calculation so it will be performed only if the number of pages\nisn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in\nthe above loop correctly.\nAlso prevent out-of-bounds reach in the chunks array in such scenario.", "A flaw was found in the Linux kernel's Elastic Fabric Adapter (EFA) driver within the Remote Direct Memory Access (RDMA) subsystem. This vulnerability allows a local user to cause a denial of service (DoS) or memory corruption by registering a memory region with a specific page count. Due to an incorrect buffer chunk length calculation in indirect page buffer lists, the driver improperly indexes the chunk array, leading to an out-of-bounds memory access."], "name": "CVE-2026-93264", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93264\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93264\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93264.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,665cd418b8561a099c3854443f8ad8ae751b72a0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,932e5684906a090644a9061fae2d254041c3b8f2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,489b28f2377afa70c18c45b06a6387f3d39bb123)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,aadf3f9b5edb7f0a77e9172b237d2e07c754829c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,3982714e15512b83115897806dacc94899683420)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,da7805f0211af19968584e621074f253ac07dba7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,1d4b5902773475fc97151379b7e5f09cad0fa57b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40909f664d279765af430acc5db348a0b71c9b0a,229b42d7450c1cf96f45ec39ebb69211b06bc036)"}}], "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": "generic", "value": "5.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-25T06:30:06.211355+00:00", "updated": "2026-10-01T23:30:14.990622+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}