CVE-2026-89794

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89794", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.766Z", "datePublished": "2026-09-16T10:30:25.592Z", "dateUpdated": "2026-10-30T12:33:02.393Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:02.393Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: zero pipe read compound padding\n\nCompound response handling extends the last response iov to an eight-byte\nboundary.\n\nsmb2_read_pipe() allocates only the payload size, so the alignment padding\ncan expose up to seven bytes of uninitialized kernel heap memory.\n\nAllocate the aligned size and clear the unused tail before pinning the\nresponse buffer."}], "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"], "versions": [{"version": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77", "lessThan": "c7516bdf7d2c1a64b14a9f444e2ee58c12c384ae", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "134d980491b435e5cdb3171225e2506ff17867d1", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "f188a400dd5285fec5a84548fe8dca49eee01155", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "d83a9de7cecd401c3d3e00ed6371194dcd7313e4", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "be15b8da4a82cf1e1f9880b2661b90770606eec1", "status": "affected", "versionType": "git"}, {"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d", "lessThan": "73f860489e3be2245598d1819226304fc5b87291", "status": "affected", "versionType": "git"}, {"version": "f2283680a80571ca82d710bc6ecd8f8beac67d63", "status": "affected", "versionType": "git"}, {"version": "6.1.71", "lessThan": "6.1.191", "status": "affected", "versionType": "semver"}, {"version": "5.15.145", "lessThan": "5.16", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/smb2pdu.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "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": "6.1.71", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.145"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c7516bdf7d2c1a64b14a9f444e2ee58c12c384ae"}, {"url": "https://git.kernel.org/stable/c/134d980491b435e5cdb3171225e2506ff17867d1"}, {"url": "https://git.kernel.org/stable/c/f188a400dd5285fec5a84548fe8dca49eee01155"}, {"url": "https://git.kernel.org/stable/c/d83a9de7cecd401c3d3e00ed6371194dcd7313e4"}, {"url": "https://git.kernel.org/stable/c/be15b8da4a82cf1e1f9880b2661b90770606eec1"}, {"url": "https://git.kernel.org/stable/c/73f860489e3be2245598d1819226304fc5b87291"}], "title": "ksmbd: zero pipe read compound padding", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,f188a400dd5285fec5a84548fe8dca49eee01155)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,d83a9de7cecd401c3d3e00ed6371194dcd7313e4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,be15b8da4a82cf1e1f9880b2661b90770606eec1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d,73f860489e3be2245598d1819226304fc5b87291)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f2283680a80571ca82d710bc6ecd8f8beac67d63"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.15.145,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.1.71,6.2)"}}], "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": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "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": "2026-09-17T08:00:23.746001+00:00", "updated": "2026-09-18T10:30:07.496179+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-200", "CWE-254"]}