{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23134", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.971Z", "datePublished": "2026-02-14T15:14:33.806Z", "dateUpdated": "2026-02-14T15:14:33.806Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-14T15:14:33.806Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nslab: fix kmalloc_nolock() context check for PREEMPT_RT\n\nOn PREEMPT_RT kernels, local_lock becomes a sleeping lock. The current\ncheck in kmalloc_nolock() only verifies we're not in NMI or hard IRQ\ncontext, but misses the case where preemption is disabled.\n\nWhen a BPF program runs from a tracepoint with preemption disabled\n(preempt_count > 0), kmalloc_nolock() proceeds to call\nlocal_lock_irqsave() which attempts to acquire a sleeping lock,\ntriggering:\n\n BUG: sleeping function called from invalid context\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6128\n preempt_count: 2, expected: 0\n\nFix this by checking !preemptible() on PREEMPT_RT, which directly\nexpresses the constraint that we cannot take a sleeping lock when\npreemption is disabled. This encompasses the previous checks for NMI\nand hard IRQ contexts while also catching cases where preemption is\ndisabled."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/slub.c"], "versions": [{"version": "af92793e52c3a99b828ed4bdd277fd3e11c18d08", "lessThan": "f60ba4a97ae3f94e4818722ed2e4d260bbb17b44", "status": "affected", "versionType": "git"}, {"version": "af92793e52c3a99b828ed4bdd277fd3e11c18d08", "lessThan": "99a3e3a1cfc93b8fe318c0a3a5cfb01f1d4ad53c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/slub.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.8", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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", "versionEndExcluding": "6.18.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f60ba4a97ae3f94e4818722ed2e4d260bbb17b44"}, {"url": "https://git.kernel.org/stable/c/99a3e3a1cfc93b8fe318c0a3a5cfb01f1d4ad53c"}], "title": "slab: fix kmalloc_nolock() context check for PREEMPT_RT", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nslab: fix kmalloc_nolock() context check for PREEMPT_RT\n\nOn PREEMPT_RT kernels, local_lock becomes a sleeping lock. The current\ncheck in kmalloc_nolock() only verifies we're not in NMI or hard IRQ\ncontext, but misses the case where preemption is disabled.\n\nWhen a BPF program runs from a tracepoint with preemption disabled\n(preempt_count > 0), kmalloc_nolock() proceeds to call\nlocal_lock_irqsave() which attempts to acquire a sleeping lock,\ntriggering:\n\n BUG: sleeping function called from invalid context\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6128\n preempt_count: 2, expected: 0\n\nFix this by checking !preemptible() on PREEMPT_RT, which directly\nexpresses the constraint that we cannot take a sleeping lock when\npreemption is disabled. This encompasses the previous checks for NMI\nand hard IRQ contexts while also catching cases where preemption is\ndisabled."}], "id": "CVE-2026-23134", "lastModified": "2026-02-14T16:15:53.377", "metrics": {}, "published": "2026-02-14T16:15:53.377", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99a3e3a1cfc93b8fe318c0a3a5cfb01f1d4ad53c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f60ba4a97ae3f94e4818722ed2e4d260bbb17b44"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}