CVE-2026-93173

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93173", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.090Z", "datePublished": "2026-09-17T16:12:03.229Z", "dateUpdated": "2026-10-19T09:06:44.824Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:06:44.824Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks\n\n__bpf_prog_put_rcu() is the call_rcu() callback for non-sleepable programs.\nsecurity_bpf_prog_free() called from there fires bpf_prog_free in softirq;\nif a sleepable LSM prog is attached to that hook, might_fault() BUGs:\n\n BUG: sleeping function called from invalid context\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5038\n preempt_count: 101, expected: 0\n Call Trace:\n <IRQ>\n __bpf_prog_enter_sleepable+0x1cd/0x320 kernel/bpf/trampoline.c:1255\n bpf_trampoline_6442549705+0x53/0xd7\n security_bpf_prog_free+0xde/0x130 security/security.c:5465\n __bpf_prog_put_rcu+0xab/0xd0 kernel/bpf/syscall.c:2365\n rcu_do_batch kernel/rcu/tree.c:2617 [inline]\n handle_softirqs+0x236/0x800 kernel/softirq.c:622\n </IRQ>\n\nThe call_rcu/call_rcu_tasks_trace split reflects the freed program's\nsleepability, not that of any attached observer.\n\nsecurity_bpf_prog_free() also frees prog->aux->security, which has to stay\nafter the grace period, so drop bpf_prog_free from sleepable_lsm_hooks\nrather than move the call. Non-sleepable observers still run there."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/bpf_lsm.c"], "versions": [{"version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "lessThan": "2135f661fae7160a7fc603cab43cbc7999e8bfce", "status": "affected", "versionType": "git"}, {"version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "lessThan": "d5f2f741a900123fbcb7c7c0a002b81306fbe242", "status": "affected", "versionType": "git"}, {"version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "lessThan": "915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62", "status": "affected", "versionType": "git"}, {"version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "lessThan": "2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/bpf_lsm.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "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": "6.9", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2135f661fae7160a7fc603cab43cbc7999e8bfce"}, {"url": "https://git.kernel.org/stable/c/d5f2f741a900123fbcb7c7c0a002b81306fbe242"}, {"url": "https://git.kernel.org/stable/c/915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62"}, {"url": "https://git.kernel.org/stable/c/2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8"}], "title": "bpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/bpf_lsm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2135f661fae7160a7fc603cab43cbc7999e8bfce", "status": "affected", "version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "versionType": "git"}, {"lessThan": "d5f2f741a900123fbcb7c7c0a002b81306fbe242", "status": "affected", "version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "versionType": "git"}, {"lessThan": "915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62", "status": "affected", "version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "versionType": "git"}, {"lessThan": "2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8", "status": "affected", "version": "1b67772e4e3f16cd647b229cae95fc06d120be08", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/bpf_lsm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "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,lsm: Drop bpf_prog_free from sleepable_lsm_hooks\n\n__bpf_prog_put_rcu() is the call_rcu() callback for non-sleepable programs.\nsecurity_bpf_prog_free() called from there fires bpf_prog_free in softirq;\nif a sleepable LSM prog is attached to that hook, might_fault() BUGs:\n\n BUG: sleeping function called from invalid context\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5038\n preempt_count: 101, expected: 0\n Call Trace:\n <IRQ>\n __bpf_prog_enter_sleepable+0x1cd/0x320 kernel/bpf/trampoline.c:1255\n bpf_trampoline_6442549705+0x53/0xd7\n security_bpf_prog_free+0xde/0x130 security/security.c:5465\n __bpf_prog_put_rcu+0xab/0xd0 kernel/bpf/syscall.c:2365\n rcu_do_batch kernel/rcu/tree.c:2617 [inline]\n handle_softirqs+0x236/0x800 kernel/softirq.c:622\n </IRQ>\n\nThe call_rcu/call_rcu_tasks_trace split reflects the freed program's\nsleepability, not that of any attached observer.\n\nsecurity_bpf_prog_free() also frees prog->aux->security, which has to stay\nafter the grace period, so drop bpf_prog_free from sleepable_lsm_hooks\nrather than move the call. Non-sleepable observers still run there."}], "id": "CVE-2026-93173", "lastModified": "2026-10-19T10:17:07.673", "metrics": {}, "published": "2026-09-17T17:18:13.057", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2135f661fae7160a7fc603cab43cbc7999e8bfce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5f2f741a900123fbcb7c7c0a002b81306fbe242"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1b67772e4e3f16cd647b229cae95fc06d120be08,2135f661fae7160a7fc603cab43cbc7999e8bfce)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1b67772e4e3f16cd647b229cae95fc06d120be08,d5f2f741a900123fbcb7c7c0a002b81306fbe242)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1b67772e4e3f16cd647b229cae95fc06d120be08,915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1b67772e4e3f16cd647b229cae95fc06d120be08,2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8)"}}], "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": "6.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"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": "2026-09-19T08:30:16.933953+00:00", "updated": "2026-09-19T18:00:13.339032+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-749", "CWE-668"]}