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CVE-2026-46116: Linux, грешка в паметта

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.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete KASAN reproduces a slab-use-after-free in __xfrm_state_delete()'s hlist_del_rcu calls under syzkaller load on linux-6.12.y stable (reproduced on 6.12.47, also reachable via the same code path on torvalds/master and on the ipsec tree). Nine unique signatures cluster in the xfrm_state lifecycle, the load-bearing one being: BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:990 [inline] BUG: KASAN: slab-use-after-free in hlist_del_rcu include/linux/rculist.h:516 [inline] BUG: KASAN: slab-use-after-free in __xfrm_state_delete net/xfrm/xfrm_state.c Write of size 8 at addr ffff8881198bcb70 by task kworker/u8:9/435 Workqueue: netns cleanup_net Call Trace: __hlist_del / hlist_del_rcu __xfrm_state_delete xfrm_state_delete xfrm_state_flush xfrm_state_fini ops_exit_list cleanup_net The other observed signatures hit the same slab object from __xfrm_state_lookup, xfrm_alloc_spi, __xfrm_state_insert and an OOB write variant of __xfrm_state_delete, all on the byseq/byspi hash chains. __xfrm_state_delete() guards its byseq and byspi unhashes with value-based predicates: if (x->km.seq) hlist_del_rcu(&x->byseq); if (x->id.spi) hlist_del_rcu(&x->byspi); while everywhere else in the file (e.g. state_cache, state_cache_input) the safer hlist_unhashed() check is used. xfrm_alloc_spi() sets x->id.spi = newspi inside xfrm_state_lock and then immediately inserts into byspi, but a path that observes x->id.spi != 0 outside of xfrm_state_lock can still skip-or-hit the byspi unhash inconsistently with whether x is actually on the list. The same holds for x->km.seq versus byseq, and the bydst/bysrc unhashes have no predicate at all, so a second __xfrm_state_delete() on the same object writes through LIST_POISON pprev. The defensive change here: - Use hlist_del_init_rcu() instead of hlist_del_rcu()

Засегнати продукти

  • Linux Linux: 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди 6b4dc3181b4bfc5f5fc33ab33b1dc6e15759f4b6; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди 3943fcad7694a7d0b15aeabe7d3cc2a2eb8e92e8; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди 2c617848ae6e4f07a3e397f604208c293bbecacc; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди b4a53add2fa8f1b5aa17d4c5686c320785fab182; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди 26edb0a3c99f9d958c212be68b21f1221614dcf0; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди 4980162de555cb838f1a189ce7d2cbf5d2e7b050; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди a2e2d08fb070fab4947447171f1c4e3ca5a188e5; 7b4dc3600e4877178ba94c7fbf7e520421378aa6 преди 14acf9652e5690de3c7486c6db5fb8dafd0a32a3
  • Linux Linux: 2.6.19; преди 2.6.19; 5.10.261 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.140 до 6.6.*; 6.12.88 до 6.12.*; 6.18.30 до 6.18.*; 7.0.7 до 7.0.*; от 7.1 нататък
  • Red Hat: още 15 продукта, добавени от Red Hat

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 6

  • Siemens: още 4 продукта, добавени от Siemens

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Вид слабост

История

  • 28 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-46116: Linux, грешка в паметта | freedomonline.bg