{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31432", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.089Z", "datePublished": "2026-04-22T08:15:10.873Z", "dateUpdated": "2026-04-22T08:15:10.873Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-22T08:15:10.873Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix OOB write in QUERY_INFO for compound requests\n\nWhen a compound request such as READ + QUERY_INFO(Security) is received,\nand the first command (READ) consumes most of the response buffer,\nksmbd could write beyond the allocated buffer while building a security\ndescriptor.\n\nThe root cause was that smb2_get_info_sec() checked buffer space using\nppntsd_size from xattr, while build_sec_desc() often synthesized a\nsignificantly larger descriptor from POSIX ACLs.\n\nThis patch introduces smb_acl_sec_desc_scratch_len() to accurately\ncompute the final descriptor size beforehand, performs proper buffer\nchecking with smb2_calc_max_out_buf_len(), and uses exact-sized\nallocation + iov pinning."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/smb2pdu.c", "fs/smb/server/smbacl.c", "fs/smb/server/smbacl.h"], "versions": [{"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "d48c64fb80ad78b3dd29fb7d79b6ec7bd72bfc09", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "075ea208c648cc2bcd616295b711d3637c61de45", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "515c2daab46021221bdf406bef19bc90a44ec617", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "fda9522ed6afaec45cabc198d8492270c394c7bc", "status": "affected", "versionType": "git"}, {"version": "f2283680a80571ca82d710bc6ecd8f8beac67d63", "status": "affected", "versionType": "git"}, {"version": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77", "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/server/smb2pdu.c", "fs/smb/server/smbacl.c", "fs/smb/server/smbacl.h"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "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": "6.6", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.71"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d48c64fb80ad78b3dd29fb7d79b6ec7bd72bfc09"}, {"url": "https://git.kernel.org/stable/c/075ea208c648cc2bcd616295b711d3637c61de45"}, {"url": "https://git.kernel.org/stable/c/515c2daab46021221bdf406bef19bc90a44ec617"}, {"url": "https://git.kernel.org/stable/c/fda9522ed6afaec45cabc198d8492270c394c7bc"}], "title": "ksmbd: fix OOB write in QUERY_INFO for compound requests", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix OOB write in QUERY_INFO for compound requests\n\nWhen a compound request such as READ + QUERY_INFO(Security) is received,\nand the first command (READ) consumes most of the response buffer,\nksmbd could write beyond the allocated buffer while building a security\ndescriptor.\n\nThe root cause was that smb2_get_info_sec() checked buffer space using\nppntsd_size from xattr, while build_sec_desc() often synthesized a\nsignificantly larger descriptor from POSIX ACLs.\n\nThis patch introduces smb_acl_sec_desc_scratch_len() to accurately\ncompute the final descriptor size beforehand, performs proper buffer\nchecking with smb2_calc_max_out_buf_len(), and uses exact-sized\nallocation + iov pinning."}], "id": "CVE-2026-31432", "lastModified": "2026-04-22T09:16:21.410", "metrics": {}, "published": "2026-04-22T09:16:21.410", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/075ea208c648cc2bcd616295b711d3637c61de45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/515c2daab46021221bdf406bef19bc90a44ec617"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d48c64fb80ad78b3dd29fb7d79b6ec7bd72bfc09"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fda9522ed6afaec45cabc198d8492270c394c7bc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,d48c64fb80ad78b3dd29fb7d79b6ec7bd72bfc09)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,075ea208c648cc2bcd616295b711d3637c61de45)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,515c2daab46021221bdf406bef19bc90a44ec617)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,fda9522ed6afaec45cabc198d8492270c394c7bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f2283680a80571ca82d710bc6ecd8f8beac67d63"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77"}}], "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": "6.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[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": "2026-04-22T09:30:13.308109+00:00", "updated": "2026-04-22T09:30:13.308241+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}