CVE-2020-36791
net_sched: keep alloc_hash updated after hash allocation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 7, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
73c29d2f6f8ae731b1e09051b69ed3ba2319482b < d6cdc5bb19b595486fb2e6661e5138d73a57f454 b974ac51f5834a729de252fc5c1c9de9efd79b45 < c4453d2833671e3a9f6bd52f0f581056c3736386 6cb448ee493c8a514c9afa0c346f3f5b3227de85 < 9f8b6c44be178c2498a00b270872a6e30e7c8266 478c4b2ffd44e5186c7e22ae7c38a86a5b9cfde5 < 557d015ffb27b672e24e6ad141fd887783871dc2 dd8142a6fa5270783d415292ec8169f4ea2a5468 < d23faf32e577922b6da20bf3740625c1105381bf 2c66ff8d08f81bcf8e8cb22e31e39c051b15336a < bd3ee8fb6371b45c71c9345cc359b94da2ddefa9 599be01ee567b61f4471ee8078870847d0a11e8e < 0d1c3530e1bd38382edef72591b78e877e0edcd3
Linux / Linux
4.4.214 < 4.4.218 4.9.214 < 4.9.218 4.14.171 < 4.14.175 4.19.103 < 4.19.114 5.4.19 < 5.4.29 5.5.3 < 5.5.14
References
git.kernel.org: https://git.kernel.org/stable/c/d6cdc5bb19b595486fb2e6661e5138d73a57f454 git.kernel.org: https://git.kernel.org/stable/c/c4453d2833671e3a9f6bd52f0f581056c3736386 git.kernel.org: https://git.kernel.org/stable/c/9f8b6c44be178c2498a00b270872a6e30e7c8266 git.kernel.org: https://git.kernel.org/stable/c/557d015ffb27b672e24e6ad141fd887783871dc2 git.kernel.org: https://git.kernel.org/stable/c/d23faf32e577922b6da20bf3740625c1105381bf git.kernel.org: https://git.kernel.org/stable/c/bd3ee8fb6371b45c71c9345cc359b94da2ddefa9 git.kernel.org: https://git.kernel.org/stable/c/0d1c3530e1bd38382edef72591b78e877e0edcd3 syzkaller.appspot.com: https://syzkaller.appspot.com/bug?id=ea260693da894e7b078d18fca2c9c0a19b457534 blog.cdthoughts.ch: https://blog.cdthoughts.ch/2021/03/16/syzbot-bug.html