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CVE-2026-99032: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net/smc: protect clcsock lifetime in smc_getname smc_getname() dereferences smc->clcsock without holding clcsock_release_lock. Link-group termination can release the CLC socket through smc_close_active_abort() while the SMC socket is still open, for example after shutdown(SHUT_WR). A getsockname() caller can load smc->clcsock, then the termination worker can clear the pointer and call sock_release() before the caller accesses clcsock->ops or invokes getname(). This causes a use-after-free; if the worker clears the pointer before the load, it causes a NULL dereference. The syscall's file reference keeps the SMC socket alive but does not prevent asynchronous release of its CLC socket. KASAN reported the following with test-only timing instrumentation: BUG: KASAN: slab-use-after-free in smc_getname+0x19e/0x1b0 Read of size 8 at addr ffff888109abb4e0 by task poc/103 Call Trace: smc_getname+0x19e/0x1b0 do_getsockname+0xe5/0x170 __sys_getsockname+0x8c/0x100 Allocated by task 95: sock_alloc_inode+0x1e/0x280 sock_alloc+0x3d/0x240 __sock_create+0x7e/0x430 smc_create+0x121/0x240 Freed by task 0: kmem_cache_free+0xcc/0x340 rcu_core+0x50a/0x1850 Last potentially related work creation: evict+0x446/0x6c0 smc_clcsock_release+0xa8/0xd0 smc_close_active_abort+0x26a/0x3a0 __smc_lgr_terminate.part.0+0x137/0x2e0 Hold clcsock_release_lock across the pointer check and the getname() callback to serialize with smc_clcsock_release(). Return -EBADF if the CLC socket has already been released, preserving the existing peer state check and the callback's return value otherwise.

    Засегнати продукти

    • Linux Linux: b03faa1fafc8018295401dc558bdc76362d860a4 преди 5d0fa089d5ed497366ea5c000c6eefb346c7cb01; b03faa1fafc8018295401dc558bdc76362d860a4 преди 94a43efd71ad440c35dd469559d3a6d665f102d9; b03faa1fafc8018295401dc558bdc76362d860a4 преди 04069199816285c49199a35971f4298199609687; b03faa1fafc8018295401dc558bdc76362d860a4 преди e607017a553d2a48e428ec8b8ffb06bf3bb92ce9; b03faa1fafc8018295401dc558bdc76362d860a4 преди 1512e3714b3946bda75a160a34f22a51710daa43; b03faa1fafc8018295401dc558bdc76362d860a4 преди 6a1833f0d7dc037c8e876b9178ba69d5d107c086; b03faa1fafc8018295401dc558bdc76362d860a4 преди c223da71abfaea2ebb1c7208ae9ebf15038f9388; b03faa1fafc8018295401dc558bdc76362d860a4 преди 64a6b36b0e1855288080bc5f89769f27d6dc03c8; 0b6153d04c96a1d4b6284692386aa21d04d7956c; 4.19.299 преди 4.20
    • Linux Linux: 5.1; преди 5.1; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.113 до 6.12.*; 6.18.57 до 6.18.*; 7.2.11 до 7.2.*; от 7.3 нататък

    История

    • 23 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99032: Linux | freedomonline.bg