{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31614", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.123Z", "datePublished": "2026-04-24T14:42:34.153Z", "dateUpdated": "2026-05-11T22:12:12.852Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:12:12.852Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix off-by-8 bounds check in check_wsl_eas()\n\nThe bounds check uses (u8 *)ea + nlen + 1 + vlen as the end of the EA\nname and value, but ea_data sits at offset sizeof(struct\nsmb2_file_full_ea_info) = 8 from ea, not at offset 0. The strncmp()\nlater reads ea->ea_data[0..nlen-1] and the value bytes follow at\nea_data[nlen+1..nlen+vlen], so the actual end is ea->ea_data + nlen + 1\n+ vlen. Isn't pointer math fun?\n\nThe earlier check (u8 *)ea > end - sizeof(*ea) only guarantees the\n8-byte header is in bounds, but since the last EA is placed within 8\nbytes of the end of the response, the name and value bytes are read past\nthe end of iov.\n\nFix this mess all up by using ea->ea_data as the base for the bounds\ncheck.\n\nAn \"untrusted\" server can use this to leak up to 8 bytes of kernel heap\ninto the EA name comparison and influence which WSL xattr the data is\ninterpreted as."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2inode.c"], "versions": [{"version": "7449d736bbbd160c76b01b8fcdf72f58a8757d4b", "lessThan": "bfbc74df8bbe095b3ed68f6d4487b368af087890", "status": "affected", "versionType": "git"}, {"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4", "lessThan": "5cc0574c84aa73946ade587c41e81757b8b01cb5", "status": "affected", "versionType": "git"}, {"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4", "lessThan": "b2b76d09a64c538c57006180103fc1841e8cfa66", "status": "affected", "versionType": "git"}, {"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4", "lessThan": "ba3ad159aa61810bbe0acaf39578b1ebfb6f1a18", "status": "affected", "versionType": "git"}, {"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4", "lessThan": "a893f1757d9a4009e4a8d7ceb2312142fe29cea4", "status": "affected", "versionType": "git"}, {"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4", "lessThan": "3d8b9d06bd3ac4c6846f5498800b0f5f8062e53b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2inode.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.1", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "6.6.32", "versionEndExcluding": "6.6.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.0.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bfbc74df8bbe095b3ed68f6d4487b368af087890"}, {"url": "https://git.kernel.org/stable/c/5cc0574c84aa73946ade587c41e81757b8b01cb5"}, {"url": "https://git.kernel.org/stable/c/b2b76d09a64c538c57006180103fc1841e8cfa66"}, {"url": "https://git.kernel.org/stable/c/ba3ad159aa61810bbe0acaf39578b1ebfb6f1a18"}, {"url": "https://git.kernel.org/stable/c/a893f1757d9a4009e4a8d7ceb2312142fe29cea4"}, {"url": "https://git.kernel.org/stable/c/3d8b9d06bd3ac4c6846f5498800b0f5f8062e53b"}], "title": "smb: client: fix off-by-8 bounds check in check_wsl_eas()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1487B72A-0930-4903-A6AE-173E355D9209", "versionEndExcluding": "6.6.136", "versionStartIncluding": "6.6.32", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ABBF18DE-4F74-47AB-B0B1-8493B33EDC1E", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A", "versionEndExcluding": "7.0.1", "versionStartIncluding": "7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix off-by-8 bounds check in check_wsl_eas()\n\nThe bounds check uses (u8 *)ea + nlen + 1 + vlen as the end of the EA\nname and value, but ea_data sits at offset sizeof(struct\nsmb2_file_full_ea_info) = 8 from ea, not at offset 0. The strncmp()\nlater reads ea->ea_data[0..nlen-1] and the value bytes follow at\nea_data[nlen+1..nlen+vlen], so the actual end is ea->ea_data + nlen + 1\n+ vlen. Isn't pointer math fun?\n\nThe earlier check (u8 *)ea > end - sizeof(*ea) only guarantees the\n8-byte header is in bounds, but since the last EA is placed within 8\nbytes of the end of the response, the name and value bytes are read past\nthe end of iov.\n\nFix this mess all up by using ea->ea_data as the base for the bounds\ncheck.\n\nAn \"untrusted\" server can use this to leak up to 8 bytes of kernel heap\ninto the EA name comparison and influence which WSL xattr the data is\ninterpreted as."}], "id": "CVE-2026-31614", "lastModified": "2026-04-29T18:03:40.233", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-04-24T15:16:40.663", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d8b9d06bd3ac4c6846f5498800b0f5f8062e53b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5cc0574c84aa73946ade587c41e81757b8b01cb5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a893f1757d9a4009e4a8d7ceb2312142fe29cea4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b2b76d09a64c538c57006180103fc1841e8cfa66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ba3ad159aa61810bbe0acaf39578b1ebfb6f1a18"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bfbc74df8bbe095b3ed68f6d4487b368af087890"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: smb: client: fix off-by-8 bounds check in check_wsl_eas()", "id": "2461494", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461494"}, "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-125", "details": ["A flaw was found in the Linux kernel's Server Message Block (SMB) client. An untrusted server can exploit an out-of-bounds read vulnerability within the `check_wsl_eas()` function. This flaw allows the server to read up to 8 bytes beyond the intended memory boundary, leading to information disclosure. The leaked kernel memory could potentially disclose sensitive data and influence the interpretation of Windows Subsystem for Linux (WSL) extended attributes."], "name": "CVE-2026-31614", "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": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31614\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31614\nhttps://lore.kernel.org/linux-cve-announce/2026042423-CVE-2026-31614-4bf1@gregkh/T"], "threat_severity": "Moderate"}

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