CVE-2026-90247

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90247", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.795Z", "datePublished": "2026-09-17T16:07:49.444Z", "dateUpdated": "2026-10-30T12:34:55.059Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:34:55.059Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix mmap_lock leak in irq_work path\n\nstack_map_get_build_id_offset() introduced a per-CPU irq_work to defer\nmmap_read_unlock() from NMI context, and bpf_find_vma() later reused the\nsame mmap_unlock_work. Both callers only check whether the work is busy\nbefore taking mmap_lock, so a nested caller can reuse the slot before the\nfirst caller queues it. Two read locks may then be acquired while only one\ndeferred unlock runs, leaking a read lock and blocking exit_mmap().\n\nReserve the per-CPU slot before mmap_read_trylock(). Use the same wrapper\nin stackmap and bpf_find_vma() so both callers release the reservation on\ntrylock failure. Keep rejecting the slot while the irq_work remains busy.\nRelease it after the irq_work callback unlocks the mm."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/mmap_unlock_work.h", "kernel/bpf/stackmap.c", "kernel/bpf/task_iter.c"], "versions": [{"version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "lessThan": "d6d091873e12d1de36d7228c4f452e6cace3a23e", "status": "affected", "versionType": "git"}, {"version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "lessThan": "b6c9daf6097f9b39162b8e736a6ac7caf5ef6fc8", "status": "affected", "versionType": "git"}, {"version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "lessThan": "931f62311c058d79f29548f20943969bb441ce87", "status": "affected", "versionType": "git"}, {"version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "lessThan": "a052ad5edccf5319f50ed955de4368f8318a9f20", "status": "affected", "versionType": "git"}, {"version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "lessThan": "051f2da26ce377f683b938a3382e0f16d02f3139", "status": "affected", "versionType": "git"}, {"version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "lessThan": "fa9dcacdcdf487f0ffef64bf67622f1caed509f1", "status": "affected", "versionType": "git"}, {"version": "a7f4da875c16f3b8bef0d9ec67528111045bfcd8", "status": "affected", "versionType": "git"}, {"version": "f1838da73cccb238b8be4ef464fce0168dc7ba84", "status": "affected", "versionType": "git"}, {"version": "4.19.92", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.7", "lessThan": "5.5", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/mmap_unlock_work.h", "kernel/bpf/stackmap.c", "kernel/bpf/task_iter.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "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": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "5.5", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d6d091873e12d1de36d7228c4f452e6cace3a23e"}, {"url": "https://git.kernel.org/stable/c/b6c9daf6097f9b39162b8e736a6ac7caf5ef6fc8"}, {"url": "https://git.kernel.org/stable/c/931f62311c058d79f29548f20943969bb441ce87"}, {"url": "https://git.kernel.org/stable/c/a052ad5edccf5319f50ed955de4368f8318a9f20"}, {"url": "https://git.kernel.org/stable/c/051f2da26ce377f683b938a3382e0f16d02f3139"}, {"url": "https://git.kernel.org/stable/c/fa9dcacdcdf487f0ffef64bf67622f1caed509f1"}], "title": "bpf: Fix mmap_lock leak in irq_work path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/mmap_unlock_work.h", "kernel/bpf/stackmap.c", "kernel/bpf/task_iter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d6d091873e12d1de36d7228c4f452e6cace3a23e", "status": "affected", "version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "versionType": "git"}, {"lessThan": "b6c9daf6097f9b39162b8e736a6ac7caf5ef6fc8", "status": "affected", "version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "versionType": "git"}, {"lessThan": "931f62311c058d79f29548f20943969bb441ce87", "status": "affected", "version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "versionType": "git"}, {"lessThan": "a052ad5edccf5319f50ed955de4368f8318a9f20", "status": "affected", "version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "versionType": "git"}, {"lessThan": "051f2da26ce377f683b938a3382e0f16d02f3139", "status": "affected", "version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "versionType": "git"}, {"lessThan": "fa9dcacdcdf487f0ffef64bf67622f1caed509f1", "status": "affected", "version": "eac9153f2b584c702cea02c1f1a57d85aa9aea42", "versionType": "git"}, {"status": "affected", "version": "a7f4da875c16f3b8bef0d9ec67528111045bfcd8", "versionType": "git"}, {"status": "affected", "version": "f1838da73cccb238b8be4ef464fce0168dc7ba84", "versionType": "git"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.92", "versionType": "semver"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.7", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/mmap_unlock_work.h", "kernel/bpf/stackmap.c", "kernel/bpf/task_iter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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\nbpf: Fix mmap_lock leak in irq_work path\n\nstack_map_get_build_id_offset() introduced a per-CPU irq_work to defer\nmmap_read_unlock() from NMI context, and bpf_find_vma() later reused the\nsame mmap_unlock_work. Both callers only check whether the work is busy\nbefore taking mmap_lock, so a nested caller can reuse the slot before the\nfirst caller queues it. Two read locks may then be acquired while only one\ndeferred unlock runs, leaking a read lock and blocking exit_mmap().\n\nReserve the per-CPU slot before mmap_read_trylock(). Use the same wrapper\nin stackmap and bpf_find_vma() so both callers release the reservation on\ntrylock failure. Keep rejecting the slot while the irq_work remains busy.\nRelease it after the irq_work callback unlocks the mm."}], "id": "CVE-2026-90247", "lastModified": "2026-10-30T13:20:47.630", "metrics": {}, "published": "2026-09-17T17:17:20.803", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/051f2da26ce377f683b938a3382e0f16d02f3139"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/931f62311c058d79f29548f20943969bb441ce87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a052ad5edccf5319f50ed955de4368f8318a9f20"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6c9daf6097f9b39162b8e736a6ac7caf5ef6fc8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d6d091873e12d1de36d7228c4f452e6cace3a23e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa9dcacdcdf487f0ffef64bf67622f1caed509f1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eac9153f2b584c702cea02c1f1a57d85aa9aea42,a052ad5edccf5319f50ed955de4368f8318a9f20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eac9153f2b584c702cea02c1f1a57d85aa9aea42,051f2da26ce377f683b938a3382e0f16d02f3139)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eac9153f2b584c702cea02c1f1a57d85aa9aea42,fa9dcacdcdf487f0ffef64bf67622f1caed509f1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "a7f4da875c16f3b8bef0d9ec67528111045bfcd8"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f1838da73cccb238b8be4ef464fce0168dc7ba84"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.92,4.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.7,5.5)"}}], "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": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"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": "2026-09-19T07:00:10.674107+00:00", "updated": "2026-09-20T01:15:07.038383+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-400"]}