Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix use-after-free in advance_sched() on schedule switch In advance_sched(), when should_change_schedules() returns true, switch_schedules() is called to promote the admin schedule to oper. switch_schedules() queues the old oper schedule for RCU freeing via call_rcu(), but 'next' still points into an entry of the old oper schedule. The subsequent 'next->end_time = end_time' and rcu_assign_pointer(q->current_entry, next) are use-after-free. Fix this by selecting 'next' from the new oper schedule immediately after switch_schedules(), and using its pre-calculated end_time. setup_first_end_time() sets the first entry's end_time to base_time + interval when the schedule is installed, so the value is already correct. The deleted 'end_time = sched_base_time(admin)' assignment was also harmful independently: it would overwrite the new first entry's pre-calculated end_time with just base_time.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before a8fc396519ef4f081bc545e88f61241728bb78d7; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before 3471874578160a28c171a607fa069f24062634b8; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before 7256996e1ef553716817f3bfd077c2f3b48b582f; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before eee072fe16c646190d33ae69c9983d8de1562bf8; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before 1bd286fa3e21200133478ed523cc6a2788baf38a; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before b73235da5dde77ed1264f9767b62c28c9d71fd78; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before 0e62171df8ed4804d00db088f17eed06468233fa; affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 before 105425b1969c5affe532713cfac1c0b320d7ac2b |
| Linux / Linux | affected 5.2; unaffected 0 before 5.2; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.141 through 6.6.*; unaffected 6.12.91 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a8fc396519ef4f081bc545e88f61241728bb78d7
- https://git.kernel.org/stable/c/3471874578160a28c171a607fa069f24062634b8
- https://git.kernel.org/stable/c/7256996e1ef553716817f3bfd077c2f3b48b582f
- https://git.kernel.org/stable/c/eee072fe16c646190d33ae69c9983d8de1562bf8
- https://git.kernel.org/stable/c/1bd286fa3e21200133478ed523cc6a2788baf38a
- https://git.kernel.org/stable/c/b73235da5dde77ed1264f9767b62c28c9d71fd78
- https://git.kernel.org/stable/c/0e62171df8ed4804d00db088f17eed06468233fa
- https://git.kernel.org/stable/c/105425b1969c5affe532713cfac1c0b320d7ac2b
ADP enrichment
No English description supplied.
No references supplied.