{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89636", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.739Z", "datePublished": "2026-09-11T19:45:30.283Z", "dateUpdated": "2026-09-11T19:45:30.283Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:30.283Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: clear ce->tgthint in free_tgts()\n\nWhen free_tgts() frees all structures in ce->tlist, ce->tgthint\nis left pointing to one of the freed cache_dfs_tgt structures.\n\nIf ce->tgthint is not reset before it is used later, it results\nin a use-after-free.\n\nSet ce->tgthint to NULL in free_tgts() after the elements are\nfreed to reflect that no elements remain."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/dfs_cache.c"], "versions": [{"version": "54be1f6c1c37498bba557049df646cc239fa37e3", "lessThan": "7507bd1885643d0461a6017767492450af1ce2a3", "status": "affected", "versionType": "git"}, {"version": "54be1f6c1c37498bba557049df646cc239fa37e3", "lessThan": "9ab46a13798a61d9d020b01d4e57efdabe6624fa", "status": "affected", "versionType": "git"}, {"version": "54be1f6c1c37498bba557049df646cc239fa37e3", "lessThan": "5baab40404a9393bcc0b7b8f1950bf2c307e0984", "status": "affected", "versionType": "git"}, {"version": "54be1f6c1c37498bba557049df646cc239fa37e3", "lessThan": "b1b741cf8e7ce1b91d937e23decd3d3358748700", "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/dfs_cache.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "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-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": "5.0", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3"}, {"url": "https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa"}, {"url": "https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984"}, {"url": "https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700"}], "title": "smb: client: clear ce->tgthint in free_tgts()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/dfs_cache.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7507bd1885643d0461a6017767492450af1ce2a3", "status": "affected", "version": "54be1f6c1c37498bba557049df646cc239fa37e3", "versionType": "git"}, {"lessThan": "9ab46a13798a61d9d020b01d4e57efdabe6624fa", "status": "affected", "version": "54be1f6c1c37498bba557049df646cc239fa37e3", "versionType": "git"}, {"lessThan": "5baab40404a9393bcc0b7b8f1950bf2c307e0984", "status": "affected", "version": "54be1f6c1c37498bba557049df646cc239fa37e3", "versionType": "git"}, {"lessThan": "b1b741cf8e7ce1b91d937e23decd3d3358748700", "status": "affected", "version": "54be1f6c1c37498bba557049df646cc239fa37e3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/dfs_cache.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "status": "unaffected", "version": "0", "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-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\nsmb: client: clear ce->tgthint in free_tgts()\n\nWhen free_tgts() frees all structures in ce->tlist, ce->tgthint\nis left pointing to one of the freed cache_dfs_tgt structures.\n\nIf ce->tgthint is not reset before it is used later, it results\nin a use-after-free.\n\nSet ce->tgthint to NULL in free_tgts() after the elements are\nfreed to reflect that no elements remain."}], "id": "CVE-2026-89636", "lastModified": "2026-09-11T20:19:49.243", "metrics": {}, "published": "2026-09-11T20:19:49.243", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel SMB client: Use-after-free vulnerability due to improper handling of freed structures", "id": "2532294", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532294"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's Server Message Block (SMB) client. When the `free_tgts()` function frees data structures, a pointer (`ce->tgthint`) is not properly reset, leaving it pointing to a memory location that has already been deallocated. If this pointer is subsequently used, it can lead to a use-after-free vulnerability. This could potentially allow a local attacker to cause a denial of service or escalate privileges."], "name": "CVE-2026-89636", "public_date": "2026-09-11T19:45:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89636\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89636\nhttps://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984\nhttps://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3\nhttps://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa\nhttps://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700"], "threat_severity": "Important"}

{}