CVE-2026-23449

Schwachstellenklasse

In the Linux kernel, the following vulnerability has been resolved: net/sched: teql: Fix double-free in teql_master_xmit Whenever a TEQL devices has a lockless Qdisc as root, qdisc_reset should be called using the seq_lock to avoid racing with the datapath. Failure to do so may cause crashes like the following: [ 238.028993][ T318] BUG: KASAN: double-free in skb_release_data (net/core/skbuff.c:1139) [ 238.029328][ T318] Free of addr ffff88810c67ec00 by task poc_teql_uaf_ke/318 [ 238.029749][ T318] [ 238.029900][ T318] CPU: 3 UID: 0 PID: 318 Comm: poc_teql_ke Not tainted 7.0.0-rc3-00149-ge5b31d988a41 #704 PREEMPT(full) [ 238.029906][ T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 238.029910][ T318] Call Trace: [ 238.029913][ T318] <TASK> [ 238.029916][ T318] dump_stack_lvl (lib/dump_stack.c:122) [ 238.029928][ T318] print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) [ 238.029940][ T318] ? skb_release_data (net/core/skbuff.c:1139) [ 238.029944][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) ... [ 238.029957][ T318] ? skb_release_data (net/core/skbuff.c:1139) [ 238.029969][ T318] kasan_report_invalid_free (mm/kasan/report.c:221 mm/kasan/report.c:563

Betroffene Produkte

• linux linux_kernel

Quellen

• https://git.kernel.org/stable/c/21c89a0a8de7eadad8d385645a95b3233f23130e
• https://git.kernel.org/stable/c/4a233447b941db451ea5f5a0942cffd0f7f7eaae
• https://git.kernel.org/stable/c/4e8ebc4c18ea8213d28e6cb867d18fcc67daca21
• https://git.kernel.org/stable/c/66360460cab63c248ca5b1070a01c0c29133b960
• https://git.kernel.org/stable/c/afbc79a7770b230a9f24bd39271209d6b3682c5f
• https://git.kernel.org/stable/c/e9c66d3e7d8557b3308e55c613aa07254fe97611