CVE-2026-46099

Vulnerability overview

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_i...

Affected product and versions

Product

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6

Affected versions

>= af4a2209b1344939eaac11f269c261d347cbc3ee < 51fef5a7c4d160839199e941929456ba21ddf73c, >= af4a2209b1344939eaac11f269c261d347cbc3ee < b258b849a580285a1692e782ebc902b44c884a71, >= af4a2209b1344939eaac11f269c261d347cbc3ee < 6bd17925bd6866027a6555db17905b9fc073d38d, >= af4a2209b1344939eaac11f269c261d347cbc3ee < 52f9db67f8f35f436366cf4980b4f0a2583d0ef0, >= af4a2209b1344939eaac11f269c261d347cbc3ee < b778b6d095421619c331fd2d7751143cd5387103, >= af4a2209b1344939eaac11f269c261d347cbc3ee < 9dd5481f960e337b81d7dfe429529495c1c481c0, >= af4a2209b1344939eaac11f269c261d347cbc3ee < f9c52a6ba9780bd27e0bf4c044fd91c13c778b6e, >= 4.12, >= 4.12 < 5.15.209, >= 5.16 < 6.1.175, >= 6.2 < 6.6.140, >= 6.7 < 6.12.86, >= 6.13 < 6.18.27, >= 6.19 < 7.0.4, 7.1

Fixed versions

5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-911