Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0c8d13ac96070000da33f394f45e9c19638483c5 before 2790c4ec481be45a80948d059cd7c9a06bc37493; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before a1bf6a4e9264a685b0e642994031f9c5aad72414; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before 110a47efcf23438ff8d31dbd9c854fae2a48bf98; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before f569984417a4e12c67366e69bdcb752970de921d; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before 2a71924ca4af59ffc00f0444732b6cd54b153d0e; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before 4b755305b2b0618e857fdadb499365b5f2e478d1; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before 444ad445df5496a785705019268a8a84b84484bb; affected 0c8d13ac96070000da33f394f45e9c19638483c5 before 85a3e0ede38450ea3053b8c45d28cf55208409b8 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.4.295 through 5.4.*; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.94 through 6.6.*; unaffected 6.12.34 through 6.12.*; unaffected 6.15.3 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/2790c4ec481be45a80948d059cd7c9a06bc37493
- https://git.kernel.org/stable/c/a1bf6a4e9264a685b0e642994031f9c5aad72414
- https://git.kernel.org/stable/c/110a47efcf23438ff8d31dbd9c854fae2a48bf98
- https://git.kernel.org/stable/c/f569984417a4e12c67366e69bdcb752970de921d
- https://git.kernel.org/stable/c/2a71924ca4af59ffc00f0444732b6cd54b153d0e
- https://git.kernel.org/stable/c/4b755305b2b0618e857fdadb499365b5f2e478d1
- https://git.kernel.org/stable/c/444ad445df5496a785705019268a8a84b84484bb
- https://git.kernel.org/stable/c/85a3e0ede38450ea3053b8c45d28cf55208409b8
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.