CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, при специфични условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels seg6_input_core() and rpl_input() call ip6_route_input() which sets a NOREF dst on the skb, then pass it to dst_cache_set_ip6() invoking dst_hold() unconditionally. On PREEMPT_RT, ksoftirqd is preemptible and a higher-priority task can release the underlying pcpu_rt between the lookup and the caching through a concurrent FIB lookup on a shared nexthop. Simplified race sequence: ksoftirqd/X higher-prio task (same CPU X) ----------- -------------------------------- seg6_input_core(,skb)/rpl_input(skb) dst_cache_get() -> miss ip6_route_input(skb) -> ip6_pol_route(,skb,flags) [RT6_LOOKUP_F_DST_NOREF in flags] -> FIB lookup resolves fib6_nh [nhid=N route] -> rt6_make_pcpu_route() [creates pcpu_rt, refcount=1] pcpu_rt->sernum = fib6_sernum [fib6_sernum=W] -> cmpxchg(fib6_nh.rt6i_pcpu, NULL, pcpu_rt) [slot was empty, store succeeds] -> skb_dst_set_noref(skb, dst) [dst is pcpu_rt, refcount still 1] rt_genid_bump_ipv6() -> bumps fib6_sernum [fib6_sernum from W to Z] ip6_route_output() -> ip6_pol_route() -> FIB lookup resolves fib6_nh [nhid=N] -> rt6_get_pcpu_route() pcpu_rt->sernum != fib6_sernum [W <> Z, stale] -> prev = xchg(rt6i_pcpu, NULL) -> dst_release(prev)
Засегнати продукти
- Linux Linux: af4a2209b1344939eaac11f269c261d347cbc3ee преди 51fef5a7c4d160839199e941929456ba21ddf73c; af4a2209b1344939eaac11f269c261d347cbc3ee преди b258b849a580285a1692e782ebc902b44c884a71; af4a2209b1344939eaac11f269c261d347cbc3ee преди 6bd17925bd6866027a6555db17905b9fc073d38d; af4a2209b1344939eaac11f269c261d347cbc3ee преди 52f9db67f8f35f436366cf4980b4f0a2583d0ef0; af4a2209b1344939eaac11f269c261d347cbc3ee преди b778b6d095421619c331fd2d7751143cd5387103; af4a2209b1344939eaac11f269c261d347cbc3ee преди 9dd5481f960e337b81d7dfe429529495c1c481c0; af4a2209b1344939eaac11f269c261d347cbc3ee преди f9c52a6ba9780bd27e0bf4c044fd91c13c778b6e
- Linux Linux: 4.12; преди 4.12; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.86 до 6.12.*; 6.18.27 до 6.18.*; 7.0.4 до 7.0.*; 7.1 до *
- Red Hat Red Hat Enterprise Linux 10: 0:6.12.0-211.39.1.el10_2 преди *
- Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: 0:6.12.0-55.103.1.el10_0 преди *
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: 0:5.14.0-284.188.1.el9_2 преди *
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: 0:5.14.0-570.138.1.el9_6 преди *
- Red Hat Red Hat Enterprise Linux 6
- Red Hat Red Hat Enterprise Linux 7
- Red Hat Red Hat Enterprise Linux 8
- Red Hat Red Hat Enterprise Linux 9
- Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: преди *
Вид слабост
История
- 27 май 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-46099
- https://nvd.nist.gov/vuln/detail/CVE-2026-46099
- https://git.kernel.org/stable/c/51fef5a7c4d160839199e941929456ba21ddf73c
- https://git.kernel.org/stable/c/b258b849a580285a1692e782ebc902b44c884a71
- https://git.kernel.org/stable/c/6bd17925bd6866027a6555db17905b9fc073d38d
- https://git.kernel.org/stable/c/52f9db67f8f35f436366cf4980b4f0a2583d0ef0
- https://git.kernel.org/stable/c/b778b6d095421619c331fd2d7751143cd5387103
- https://git.kernel.org/stable/c/9dd5481f960e337b81d7dfe429529495c1c481c0
- https://git.kernel.org/stable/c/f9c52a6ba9780bd27e0bf4c044fd91c13c778b6e
- https://access.redhat.com/security/cve/CVE-2026-46099
- https://bugzilla.redhat.com/show_bug.cgi?id=2481972
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46099.json
- https://access.redhat.com/errata/RHSA-2026:64767
- https://access.redhat.com/errata/RHSA-2026:45114
- https://access.redhat.com/errata/RHSA-2026:59662
- https://access.redhat.com/errata/RHSA-2026:65712
- https://access.redhat.com/errata/RHSA-2026:62568
- https://access.redhat.com/errata/RHSA-2026:59663
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html