{"cve":"CVE-2026-43285","nvd":{"published":"2026-05-08T14:16:35.337","modified":"2026-06-17T10:49:18.703","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slab: do not access current->mems_allowed_seq if !allow_spin\n\nLockdep complains when get_from_any_partial() is called in an NMI\ncontext, because current->mems_allowed_seq is seqcount_spinlock_t and\nnot NMI-safe:\n\n  ================================\n  WARNING: inconsistent lock state\n  6.19.0-rc5-kfree-rcu+ #315 Tainted: G                 N\n  --------------------------------\n  inconsistent {INITIAL USE} -> {IN-NMI} usage.\n  kunit_try_catch/9989 [HC1[1]:SC0[0]:HE0:SE1] takes:\n  ffff889085799820 (&____s->seqcount#3){.-.-}-{0:0}, at: ___slab_alloc+0x58f/0xc00\n  {INITIAL USE} state was registered at:\n    lock_acquire+0x185/0x320\n    kernel_init_freeable+0x391/0x1150\n    kernel_init+0x1f/0x220\n    ret_from_fork+0x736/0x8f0\n    ret_from_fork_asm+0x1a/0x30\n  irq event stamp: 56\n  hardirqs last  enabled at (55): [<ffffffff850a68d7>] _raw_spin_unlock_irq+0x27/0x70\n  hardirqs last disabled at (56): [<ffffffff850858ca>] __schedule+0x2a8a/0x6630\n  softirqs last  enabled at (0): [<ffffffff81536711>] copy_process+0x1dc1/0x6a10\n  softirqs last disabled at (0): [<0000000000000000>] 0x0\n\n  other info that might help us debug this:\n   Possible unsafe locking scenario:\n\n         CPU0\n         ----\n    lock(&____s->seqcount#3);\n    <Interrupt>\n      lock(&____s->seqcount#3);\n\n   *** DEADLOCK ***\n\nAccording to Documentation/locking/seqlock.rst, seqcount_t is not\nNMI-safe and seqcount_latch_t should be used when read path can interrupt\nthe write-side critical section. In this case, do not access\ncurrent->mems_allowed_seq and avoid retry.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/144080a5823b2dbd635acb6decf7ab23182664f3","https://git.kernel.org/stable/c/353dd9934447b9193643ae1afd938607a74d4915","https://git.kernel.org/stable/c/efd767ddcef0669bbd33c6a823ea0a88f06d4b29"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43285","score":0.00121,"percentile":0.01878,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}