{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89639", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.740Z", "datePublished": "2026-09-11T19:45:32.532Z", "dateUpdated": "2026-09-11T19:45:32.532Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:32.532Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC\n\ncifs_do_truncate() is invoked from cifs_open() without i_rwsem, so it\ncannot use cifs_resize_file_locked() to perform a proper fscache cookie\nresize. Instead, add cifs_invalidate_cache() after cifs_setsize().\n\ncifs_invalidate_cache() calls fscache_invalidate(), which works without\nholding i_rwsem: it unconditionally increments inval_counter and sets\nFSCACHE_COOKIE_NO_DATA_TO_READ, ensuring that stale cached data is not\nserved once the cookie is later activated by fscache_use_cookie().\nTruncation to zero leaves no valid cached data, making invalidation the\ncorrect semantic here."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/file.c"], "versions": [{"version": "efbcecdecefc26fa062c0e8210533ccad7d6bd4a", "lessThan": "8b9b10fe5b8b492b27b9f4546742ea541a650213", "status": "affected", "versionType": "git"}, {"version": "fa724e235cfdb0fb0bb427d0f9dfe864ae27403e", "lessThan": "81fc3868a7f726980ff845c1d0d271051e5f0f45", "status": "affected", "versionType": "git"}, {"version": "fa724e235cfdb0fb0bb427d0f9dfe864ae27403e", "lessThan": "364b183230586a62660a7280c1eb20138338eeb5", "status": "affected", "versionType": "git"}, {"version": "6838bcac954487cc0a3c8a4ee1b3a3a30e244dc9", "status": "affected", "versionType": "git"}, {"version": "75640976cf474eb41682a13f2dbe9534ac26ca50", "status": "affected", "versionType": "git"}, {"version": "3513f3931c579ba2a715784c6dedc59e0d9282ee", "status": "affected", "versionType": "git"}, {"version": "6.18.44", "lessThan": "6.18.50", "status": "affected", "versionType": "semver"}, {"version": "6.12.105", "lessThan": "6.13", "status": "affected", "versionType": "semver"}, {"version": "7.1.8", "lessThan": "7.2", "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/client/file.c"], "versions": [{"version": "7.2", "status": "affected"}, {"version": "0", "lessThan": "7.2", "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-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": "6.18.44", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.3-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8b9b10fe5b8b492b27b9f4546742ea541a650213"}, {"url": "https://git.kernel.org/stable/c/81fc3868a7f726980ff845c1d0d271051e5f0f45"}, {"url": "https://git.kernel.org/stable/c/364b183230586a62660a7280c1eb20138338eeb5"}], "title": "cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/file.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8b9b10fe5b8b492b27b9f4546742ea541a650213", "status": "affected", "version": "efbcecdecefc26fa062c0e8210533ccad7d6bd4a", "versionType": "git"}, {"lessThan": "81fc3868a7f726980ff845c1d0d271051e5f0f45", "status": "affected", "version": "fa724e235cfdb0fb0bb427d0f9dfe864ae27403e", "versionType": "git"}, {"lessThan": "364b183230586a62660a7280c1eb20138338eeb5", "status": "affected", "version": "fa724e235cfdb0fb0bb427d0f9dfe864ae27403e", "versionType": "git"}, {"status": "affected", "version": "6838bcac954487cc0a3c8a4ee1b3a3a30e244dc9", "versionType": "git"}, {"status": "affected", "version": "75640976cf474eb41682a13f2dbe9534ac26ca50", "versionType": "git"}, {"status": "affected", "version": "3513f3931c579ba2a715784c6dedc59e0d9282ee", "versionType": "git"}, {"lessThan": "6.18.50", "status": "affected", "version": "6.18.44", "versionType": "semver"}, {"lessThan": "6.13", "status": "affected", "version": "6.12.105", "versionType": "semver"}, {"lessThan": "7.2", "status": "affected", "version": "7.1.8", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/file.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.2"}, {"lessThan": "7.2", "status": "unaffected", "version": "0", "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-rc1", "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\ncifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC\n\ncifs_do_truncate() is invoked from cifs_open() without i_rwsem, so it\ncannot use cifs_resize_file_locked() to perform a proper fscache cookie\nresize. Instead, add cifs_invalidate_cache() after cifs_setsize().\n\ncifs_invalidate_cache() calls fscache_invalidate(), which works without\nholding i_rwsem: it unconditionally increments inval_counter and sets\nFSCACHE_COOKIE_NO_DATA_TO_READ, ensuring that stale cached data is not\nserved once the cookie is later activated by fscache_use_cookie().\nTruncation to zero leaves no valid cached data, making invalidation the\ncorrect semantic here."}], "id": "CVE-2026-89639", "lastModified": "2026-09-11T20:19:49.617", "metrics": {}, "published": "2026-09-11T20:19:49.617", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/364b183230586a62660a7280c1eb20138338eeb5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/81fc3868a7f726980ff845c1d0d271051e5f0f45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b9b10fe5b8b492b27b9f4546742ea541a650213"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel CIFS: Information disclosure due to improper cache invalidation during file truncation", "id": "2532382", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532382"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-524", "details": ["A flaw was found in the Linux kernel's Common Internet File System (CIFS) implementation. When a file is truncated, the `cifs_do_truncate()` function does not properly invalidate the file system cache (fscache). This oversight can lead to stale cached data being served to users, potentially resulting in information disclosure or data inconsistency."], "name": "CVE-2026-89639", "public_date": "2026-09-11T19:45:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89639\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89639\nhttps://git.kernel.org/stable/c/364b183230586a62660a7280c1eb20138338eeb5\nhttps://git.kernel.org/stable/c/81fc3868a7f726980ff845c1d0d271051e5f0f45\nhttps://git.kernel.org/stable/c/8b9b10fe5b8b492b27b9f4546742ea541a650213"], "threat_severity": "Low"}

{"created": "2026-09-12T09:15:12.757211+00:00", "updated": "2026-09-12T14:45:07.312090+00:00", "vendors": []}