Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net_sched: keep alloc_hash updated after hash allocation In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex") I moved cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched. This difference could lead to another out of bound access. cp->alloc_hash should always be the size allocated, we should update it after this tcindex_alloc_perfect_hash().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 73c29d2f6f8ae731b1e09051b69ed3ba2319482b before d6cdc5bb19b595486fb2e6661e5138d73a57f454; affected b974ac51f5834a729de252fc5c1c9de9efd79b45 before c4453d2833671e3a9f6bd52f0f581056c3736386; affected 6cb448ee493c8a514c9afa0c346f3f5b3227de85 before 9f8b6c44be178c2498a00b270872a6e30e7c8266; affected 478c4b2ffd44e5186c7e22ae7c38a86a5b9cfde5 before 557d015ffb27b672e24e6ad141fd887783871dc2; affected dd8142a6fa5270783d415292ec8169f4ea2a5468 before d23faf32e577922b6da20bf3740625c1105381bf; affected 2c66ff8d08f81bcf8e8cb22e31e39c051b15336a before bd3ee8fb6371b45c71c9345cc359b94da2ddefa9; affected 599be01ee567b61f4471ee8078870847d0a11e8e before 0d1c3530e1bd38382edef72591b78e877e0edcd3 |
| Linux / Linux | affected 4.4.214 before 4.4.218; affected 4.9.214 before 4.9.218; affected 4.14.171 before 4.14.175; affected 4.19.103 before 4.19.114; affected 5.4.19 before 5.4.29; affected 5.5.3 before 5.5.14 |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d6cdc5bb19b595486fb2e6661e5138d73a57f454
- https://git.kernel.org/stable/c/c4453d2833671e3a9f6bd52f0f581056c3736386
- https://git.kernel.org/stable/c/9f8b6c44be178c2498a00b270872a6e30e7c8266
- https://git.kernel.org/stable/c/557d015ffb27b672e24e6ad141fd887783871dc2
- https://git.kernel.org/stable/c/d23faf32e577922b6da20bf3740625c1105381bf
- https://git.kernel.org/stable/c/bd3ee8fb6371b45c71c9345cc359b94da2ddefa9
- https://git.kernel.org/stable/c/0d1c3530e1bd38382edef72591b78e877e0edcd3
- https://syzkaller.appspot.com/bug?id=ea260693da894e7b078d18fca2c9c0a19b457534
- https://blog.cdthoughts.ch/2021/03/16/syzbot-bug.html