CVE-2026-89548

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89548", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.723Z", "datePublished": "2026-09-11T19:44:23.298Z", "dateUpdated": "2026-10-19T08:48:41.057Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:41.057Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: always drain cache_cleaner before destroying a cache_detail\n\nsunrpc_destroy_cache_detail() only cancels the global cache_cleaner\ndelayed_work when cache_list is empty. During per-netns teardown\ncache_list is never empty because init_net's caches remain registered,\nso the cancel never fires. After unlink, the caller proceeds to\ncache_destroy_net() which kfrees the cache_detail while cache_clean()\nmay still hold a dangling pointer to it. The result is a\nuse-after-free: cache_dequeue() takes cd->queue_lock on freed memory,\nand cache_put() dereferences cd->cache_put as a function pointer from\nfreed slab.\n\nDrop the list_empty guard so that cancel_delayed_work_sync() always\nruns, ensuring any in-flight cache_clean() completes before the\ncache_detail is freed. Re-arm the cleaner afterwards if other caches\nare still registered."}], "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 - sunrpc_destroy_cache_detail() runs from per-netns teardown (sunrpc_exit_net, nfsd_net_exit, gss_svc_shutdown_net) when a local task creates and destroys a network namespace; remote NFS/RPC traffic populates caches but never frees cache_detail.\nAC:L - The attacker controls both sides of the race: unshare of a user+net ns queues cache_cleaner at delay 0, writes expired entries via /proc/net/rpc/*/channel (ip_map_parse even calls cache_flush()), and drops the netns so destroy kfree()s cache_detail while cache_clean() still holds it.\nPR:L - Unprivileged users can create a user+network namespace (unshare -Urn). /proc/net/rpc cache files inherit userns-root ownership from proc_net_ns_init, so the attacker can populate and destroy those caches without init-namespace root.\nUI:N - The attacker creates the namespace, writes the cache channel, and tears the netns down from their own processes; no victim mount, file open, or other interaction is required.\nS:U - The use-after-free corrupts host kernel heap (struct cache_detail) within the same kernel security authority and is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - cache_clean() calls cache_dequeue() and cache_put() on a kfree'd cache_detail; per kernel UAF guidance, reclaim of that slab object yields an arbitrary kernel read primitive.\nI:H - cache_put() invokes cd->cache_put from the freed slab as a function pointer, and cache_dequeue() takes cd->queue_lock on freed memory, giving a control-flow hijack/write primitive.\nA:H - Use-after-free of cache_detail (spinlock on freed queue_lock and an indirect call through freed cache_put) causes a kernel oops or panic even when not fully exploited for code execution."}]}], "affected": 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"820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "2e861ce2aaa468351a6a47c4cbb4971ebb740c7b", "status": "affected", "versionType": "git"}, {"version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "3d60fdf951143d6ef4e352e2f8eb852286701726", "status": "affected", "versionType": "git"}, {"version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "f42d0fda0c67695db6bc704b04b7c10240805377", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/cache.c"], "versions": [{"version": "3.4", "status": "affected"}, {"version": "0", "lessThan": "3.4", "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": "3.4", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.4", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dec787a15c96a5665e9ffc61b429a6a4ab26e6b9"}, {"url": "https://git.kernel.org/stable/c/5eea874a696201c31e7c2d7badbfa0d90e9961b5"}, {"url": "https://git.kernel.org/stable/c/cf239de7fdcc8336259b01ea4bcf650dadad1040"}, {"url": "https://git.kernel.org/stable/c/6d74ecc2be120a0c300b224b7649fe93c0453714"}, {"url": "https://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890"}, {"url": "https://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b"}, {"url": "https://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726"}, {"url": "https://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377"}], "title": "SUNRPC: always drain cache_cleaner before destroying a cache_detail", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-89548", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:23:39.938577Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:42.819Z"}}]}}

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no victim mount, file open, or other interaction is required.\nS:U - The use-after-free corrupts host kernel heap (struct cache_detail) within the same kernel security authority and is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - cache_clean() calls cache_dequeue() and cache_put() on a kfree'd cache_detail; per kernel UAF guidance, reclaim of that slab object yields an arbitrary kernel read primitive.\nI:H - cache_put() invokes cd->cache_put from the freed slab as a function pointer, and cache_dequeue() takes cd->queue_lock on freed memory, giving a control-flow hijack/write primitive.\nA:H - Use-after-free of cache_detail (spinlock on freed queue_lock and an indirect call through freed cache_put) causes a kernel oops or panic even when not fully exploited for code execution."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "dec787a15c96a5665e9ffc61b429a6a4ab26e6b9", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "5eea874a696201c31e7c2d7badbfa0d90e9961b5", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "cf239de7fdcc8336259b01ea4bcf650dadad1040", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "6d74ecc2be120a0c300b224b7649fe93c0453714", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "9d44836f60c8c29bcdb1471fd9202387c642a890", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "2e861ce2aaa468351a6a47c4cbb4971ebb740c7b", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "3d60fdf951143d6ef4e352e2f8eb852286701726", "versionType": "git"}, {"status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "lessThan": "f42d0fda0c67695db6bc704b04b7c10240805377", "versionType": "git"}], "programFiles": ["net/sunrpc/cache.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.4"}, {"status": "unaffected", "version": "0", "lessThan": "3.4", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.270", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.109", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.50", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sunrpc/cache.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/dec787a15c96a5665e9ffc61b429a6a4ab26e6b9"}, {"url": "https://git.kernel.org/stable/c/5eea874a696201c31e7c2d7badbfa0d90e9961b5"}, {"url": "https://git.kernel.org/stable/c/cf239de7fdcc8336259b01ea4bcf650dadad1040"}, {"url": "https://git.kernel.org/stable/c/6d74ecc2be120a0c300b224b7649fe93c0453714"}, {"url": "https://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890"}, {"url": "https://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b"}, {"url": "https://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726"}, {"url": "https://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: always drain cache_cleaner before destroying a cache_detail\n\nsunrpc_destroy_cache_detail() only cancels the global cache_cleaner\ndelayed_work when cache_list is empty. During per-netns teardown\ncache_list is never empty because init_net's caches remain registered,\nso the cancel never fires. After unlink, the caller proceeds to\ncache_destroy_net() which kfrees the cache_detail while cache_clean()\nmay still hold a dangling pointer to it. The result is a\nuse-after-free: cache_dequeue() takes cd->queue_lock on freed memory,\nand cache_put() dereferences cd->cache_put as a function pointer from\nfreed slab.\n\nDrop the list_empty guard so that cancel_delayed_work_sync() always\nruns, ensuring any in-flight cache_clean() completes before the\ncache_detail is freed. Re-arm the cleaner afterwards if other caches\nare still registered."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.270", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.221", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.188", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.157", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.109", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.50", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2.4", "versionStartIncluding": "3.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.3", "versionStartIncluding": "3.4"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:41.057Z"}}}, "cveMetadata": {"cveId": "CVE-2026-89548", "state": "PUBLISHED", "dateUpdated": "2026-10-19T08:48:41.057Z", "dateReserved": "2026-09-11T19:38:34.723Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-09-11T19:44:23.298Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sunrpc/cache.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "dec787a15c96a5665e9ffc61b429a6a4ab26e6b9", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "5eea874a696201c31e7c2d7badbfa0d90e9961b5", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "cf239de7fdcc8336259b01ea4bcf650dadad1040", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "6d74ecc2be120a0c300b224b7649fe93c0453714", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "9d44836f60c8c29bcdb1471fd9202387c642a890", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "2e861ce2aaa468351a6a47c4cbb4971ebb740c7b", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "3d60fdf951143d6ef4e352e2f8eb852286701726", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}, {"lessThan": "f42d0fda0c67695db6bc704b04b7c10240805377", "status": "affected", "version": "820f9442e711a81749e70c40f149fc54c4ce0ca8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sunrpc/cache.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.4"}, {"lessThan": "3.4", "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\nSUNRPC: always drain cache_cleaner before destroying a cache_detail\n\nsunrpc_destroy_cache_detail() only cancels the global cache_cleaner\ndelayed_work when cache_list is empty. During per-netns teardown\ncache_list is never empty because init_net's caches remain registered,\nso the cancel never fires. After unlink, the caller proceeds to\ncache_destroy_net() which kfrees the cache_detail while cache_clean()\nmay still hold a dangling pointer to it. The result is a\nuse-after-free: cache_dequeue() takes cd->queue_lock on freed memory,\nand cache_put() dereferences cd->cache_put as a function pointer from\nfreed slab.\n\nDrop the list_empty guard so that cancel_delayed_work_sync() always\nruns, ensuring any in-flight cache_clean() completes before the\ncache_detail is freed. Re-arm the cleaner afterwards if other caches\nare still registered."}], "id": "CVE-2026-89548", "lastModified": "2026-10-19T09:17:49.957", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-89548", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:23:39.938577Z", "version": "2.0.3"}}]}, "published": "2026-09-11T20:19:38.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5eea874a696201c31e7c2d7badbfa0d90e9961b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d74ecc2be120a0c300b224b7649fe93c0453714"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf239de7fdcc8336259b01ea4bcf650dadad1040"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dec787a15c96a5665e9ffc61b429a6a4ab26e6b9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel SUNRPC: Use-after-free vulnerability due to improper cache cleanup", "id": "2532450", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532450"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's SUNRPC component. When `sunrpc_destroy_cache_detail()` is called, it may not properly drain the `cache_cleaner` before freeing a `cache_detail` object. This oversight can lead to a use-after-free vulnerability, where the system attempts to access or use memory that has already been deallocated. A local attacker could potentially exploit this to cause a denial of service or achieve privilege escalation."], "name": "CVE-2026-89548", "public_date": "2026-09-11T19:44:23Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89548\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89548\nhttps://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b\nhttps://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726\nhttps://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890\nhttps://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[820f9442e711a81749e70c40f149fc54c4ce0ca8,9d44836f60c8c29bcdb1471fd9202387c642a890)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[820f9442e711a81749e70c40f149fc54c4ce0ca8,2e861ce2aaa468351a6a47c4cbb4971ebb740c7b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[820f9442e711a81749e70c40f149fc54c4ce0ca8,3d60fdf951143d6ef4e352e2f8eb852286701726)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[820f9442e711a81749e70c40f149fc54c4ce0ca8,f42d0fda0c67695db6bc704b04b7c10240805377)"}}], "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": "3.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.4)"}}, {"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": "semver", "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": "2026-09-12T07:15:10.614775+00:00", "updated": "2026-09-15T22:45:07.196394+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}