{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31493", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.102Z", "datePublished": "2026-04-22T13:54:16.255Z", "dateUpdated": "2026-04-22T13:54:16.255Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-22T13:54:16.255Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/efa: Fix use of completion ctx after free\n\nOn admin queue completion handling, if the admin command completed with\nerror we print data from the completion context. The issue is that we\nalready freed the completion context in polling/interrupts handler which\nmeans we print data from context in an unknown state (it might be\nalready used again).\nChange the admin submission flow so alloc/dealloc of the context will be\nsymmetric and dealloc will be called after any potential use of the\ncontext."}], "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_com.c"], "versions": [{"version": "68fb9f3e312a36e49fd05ec2d6b668daf2c4931a", "lessThan": "0dd98aea1c0c45987fa2dd92f988b0eb1a72c125", "status": "affected", "versionType": "git"}, {"version": "68fb9f3e312a36e49fd05ec2d6b668daf2c4931a", "lessThan": "1cf95fe5dc5471efea947b4c6f8913da6bc7976e", "status": "affected", "versionType": "git"}, {"version": "68fb9f3e312a36e49fd05ec2d6b668daf2c4931a", "lessThan": "ef3b06742c8a201d0e83edc9a33a89a4fe3009f8", "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_com.c"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "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": "5.12", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0dd98aea1c0c45987fa2dd92f988b0eb1a72c125"}, {"url": "https://git.kernel.org/stable/c/1cf95fe5dc5471efea947b4c6f8913da6bc7976e"}, {"url": "https://git.kernel.org/stable/c/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8"}], "title": "RDMA/efa: Fix use of completion ctx after free", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/efa: Fix use of completion ctx after free\n\nOn admin queue completion handling, if the admin command completed with\nerror we print data from the completion context. The issue is that we\nalready freed the completion context in polling/interrupts handler which\nmeans we print data from context in an unknown state (it might be\nalready used again).\nChange the admin submission flow so alloc/dealloc of the context will be\nsymmetric and dealloc will be called after any potential use of the\ncontext."}], "id": "CVE-2026-31493", "lastModified": "2026-04-23T16:17:41.280", "metrics": {}, "published": "2026-04-22T14:16:47.170", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0dd98aea1c0c45987fa2dd92f988b0eb1a72c125"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1cf95fe5dc5471efea947b4c6f8913da6bc7976e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: RDMA/efa: Fix use of completion ctx after free", "id": "2460632", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460632"}, "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 RDMA/efa component. When an admin command completes with an error during admin queue completion handling, the system attempts to print data from a completion context that has already been freed. This use-after-free vulnerability can lead to the disclosure of sensitive information or system instability, as data is accessed from an unknown memory state."], "name": "CVE-2026-31493", "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": "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": "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": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31493\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31493\nhttps://lore.kernel.org/linux-cve-announce/2026042202-CVE-2026-31493-4d67@gregkh/T"], "threat_severity": "Moderate"}