CVE-2020-36791
Description
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().
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-36791
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-36791.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 5.5.17-1 |
| debian | bullseye | fixed | 5.5.17-1 |
| debian | forky | fixed | 5.5.17-1 |
| debian | sid | fixed | 5.5.17-1 |
| debian | trixie | fixed | 5.5.17-1 |
References
Verify integrity in audit chain (admin only). AS-IS.