CVE-2026-89497

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89497", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.714Z", "datePublished": "2026-09-11T19:43:47.439Z", "dateUpdated": "2026-10-19T08:47:48.916Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:48.916Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\norangefs: skip leading spaces before parsing client debug masks\n\norangefs_prepare_cdm_array() sizes each client debug keyword buffer\nwith strcspn(cds_head, \" \"), but then parses the keyword with %s. The\n%s conversion skips leading whitespace, while strcspn() does not.\n\nIf a client debug entry starts with a space, the allocation can be sized\nfor an empty keyword while sscanf() copies the following non-empty token.\nThis can write past the end of the allocated keyword buffer.\n\nSkip leading spaces before computing the keyword length so the allocation\nmatches the string parsed by sscanf()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The overflow is reached only via ioctl(ORANGEFS_DEV_CLIENT_STRING) on /dev/pvfs2-req after orangefs_devreq_open(); orangefs_debugfs_new_client_string() copy_from_user()s the client debug-mask table from that local fd into orangefs_prepare_cdm_array(). Unlike readdir trailers, this string is not supplied by an OrangeFS server over the network.\nAC:L - A single CLIENT_STRING ioctl whose first newline-delimited entry begins with spaces then a long non-whitespace token deterministically makes strcspn() return 0 while sscanf(\"%s\") copies that token; the attacker fully controls the 2048-byte buffer and needs no race, heap layout, or other state outside their control.\nPR:L - orangefs_devreq_open() checks only init_user_ns, O_NONBLOCK, and exclusive open\u2014no capability. The kernel documents mknod /dev/pvfs2-req, which is typically world-readable, and ioctl works on O_RDONLY, so an unprivileged local user can open the node when client-core is not holding it; user namespaces cannot open it, but init-ns DAC is enough.\nUI:N - The attacker opens /dev/pvfs2-req and issues the crafted CLIENT_STRING ioctl themselves. No victim must mount OrangeFS, start pvfs2-client-core, or otherwise interact; an already-loaded module and device node are deployment state, not user interaction.\nS:U - The heap overflow and any resulting kernel memory corruption or oops occur in the same kernel that services the ioctl. This is a standard local kernel compromise, not a VM/IOMMU/sandbox boundary crossing.\nC:H - sscanf(\"%s\") with no field width copies an attacker-chosen token (up to the 2048-byte ioctl buffer) into a kzalloc(1) keyword, a large heap overflow that can overwrite adjacent slab objects and pointers, yielding an arbitrary read primitive per CNA memory-corruption guidance.\nI:H - The same unbounded out-of-bounds write smashes heap metadata and neighboring objects with attacker-controlled bytes, which is sufficient for arbitrary write and control-flow hijack; CNA guidance rates heap buffer overflows High for integrity.\nA:H - Overflowing a 1-byte slab allocation by up to ~2KB of attacker data reliably corrupts the heap and can oops/panic the kernel even without a full exploit, so availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/orangefs/orangefs-debugfs.c"], "versions": [{"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "173bfd69696815bcf1c052f61cb69c26cca4e443", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "995f4d05589f87452a56672270af28918c8939c3", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "0ef38d53bca5ea1375fea0d3d11e9727df064b85", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "ce748ae1181d0daf5dd0d2d906d5c1cc328c153b", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "15d79c806231e62a7b746d3b42626810004e1b27", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "116d14f29a0524853c9316f32a2ac06cff5d4bf6", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "1774c5b3713add32fe15ab0d3db4b73355f94e35", "status": "affected", "versionType": "git"}, {"version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "lessThan": "d410cd5303ec59c7cf23dd61423752ce8e9ecb59", "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/orangefs/orangefs-debugfs.c"], "versions": [{"version": "4.6", "status": "affected"}, {"version": "0", "lessThan": "4.6", "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": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "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": "4.6", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/173bfd69696815bcf1c052f61cb69c26cca4e443"}, {"url": "https://git.kernel.org/stable/c/995f4d05589f87452a56672270af28918c8939c3"}, {"url": "https://git.kernel.org/stable/c/0ef38d53bca5ea1375fea0d3d11e9727df064b85"}, {"url": "https://git.kernel.org/stable/c/ce748ae1181d0daf5dd0d2d906d5c1cc328c153b"}, {"url": "https://git.kernel.org/stable/c/15d79c806231e62a7b746d3b42626810004e1b27"}, {"url": "https://git.kernel.org/stable/c/116d14f29a0524853c9316f32a2ac06cff5d4bf6"}, {"url": "https://git.kernel.org/stable/c/1774c5b3713add32fe15ab0d3db4b73355f94e35"}, {"url": "https://git.kernel.org/stable/c/d410cd5303ec59c7cf23dd61423752ce8e9ecb59"}], "title": "orangefs: skip leading spaces before parsing client debug masks", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/orangefs/orangefs-debugfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "173bfd69696815bcf1c052f61cb69c26cca4e443", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "995f4d05589f87452a56672270af28918c8939c3", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "0ef38d53bca5ea1375fea0d3d11e9727df064b85", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "ce748ae1181d0daf5dd0d2d906d5c1cc328c153b", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "15d79c806231e62a7b746d3b42626810004e1b27", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "116d14f29a0524853c9316f32a2ac06cff5d4bf6", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "1774c5b3713add32fe15ab0d3db4b73355f94e35", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}, {"lessThan": "d410cd5303ec59c7cf23dd61423752ce8e9ecb59", "status": "affected", "version": "f7be4ee07fb72a516563bc2870ef41fa589a964a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/orangefs/orangefs-debugfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"lessThan": "4.6", "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": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "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\norangefs: skip leading spaces before parsing client debug masks\n\norangefs_prepare_cdm_array() sizes each client debug keyword buffer\nwith strcspn(cds_head, \" \"), but then parses the keyword with %s. The\n%s conversion skips leading whitespace, while strcspn() does not.\n\nIf a client debug entry starts with a space, the allocation can be sized\nfor an empty keyword while sscanf() copies the following non-empty token.\nThis can write past the end of the allocated keyword buffer.\n\nSkip leading spaces before computing the keyword length so the allocation\nmatches the string parsed by sscanf()."}], "id": "CVE-2026-89497", "lastModified": "2026-10-19T09:17:43.813", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:31.820", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ef38d53bca5ea1375fea0d3d11e9727df064b85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/116d14f29a0524853c9316f32a2ac06cff5d4bf6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15d79c806231e62a7b746d3b42626810004e1b27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/173bfd69696815bcf1c052f61cb69c26cca4e443"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1774c5b3713add32fe15ab0d3db4b73355f94e35"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/995f4d05589f87452a56672270af28918c8939c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce748ae1181d0daf5dd0d2d906d5c1cc328c153b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d410cd5303ec59c7cf23dd61423752ce8e9ecb59"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: OrangeFS client debug masks parsing leads to buffer overflow", "id": "2532023", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532023"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["A flaw was found in the Linux kernel's Orange File System (orangefs) client. The `orangefs_prepare_cdm_array()` function incorrectly calculates the buffer size for client debug keywords when an entry starts with a space. This can lead to a buffer overflow, allowing data to be written beyond the intended memory boundary. Such memory corruption could potentially result in a denial of service or other unspecified impacts."], "name": "CVE-2026-89497", "package_state": [{"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": "2026-09-11T19:43:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89497\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89497\nhttps://git.kernel.org/stable/c/116d14f29a0524853c9316f32a2ac06cff5d4bf6\nhttps://git.kernel.org/stable/c/15d79c806231e62a7b746d3b42626810004e1b27\nhttps://git.kernel.org/stable/c/1774c5b3713add32fe15ab0d3db4b73355f94e35\nhttps://git.kernel.org/stable/c/d410cd5303ec59c7cf23dd61423752ce8e9ecb59"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f7be4ee07fb72a516563bc2870ef41fa589a964a,15d79c806231e62a7b746d3b42626810004e1b27)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f7be4ee07fb72a516563bc2870ef41fa589a964a,116d14f29a0524853c9316f32a2ac06cff5d4bf6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f7be4ee07fb72a516563bc2870ef41fa589a964a,1774c5b3713add32fe15ab0d3db4b73355f94e35)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f7be4ee07fb72a516563bc2870ef41fa589a964a,d410cd5303ec59c7cf23dd61423752ce8e9ecb59)"}}], "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": "4.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"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": "2026-09-12T10:00:08.637807+00:00", "updated": "2026-09-15T22:45:07.199817+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}