Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package rv (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-RV-19485301
- published2 Sept 2026
- disclosed28 Aug 2026
Introduced: 28 Aug 2026
CVE-2026-80634 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rv package and not the rv package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
The DEV_PATH_BR_VLAN_UNTAG case post-decrements info->num_encaps inside WARN_ON_ONCE(). num_encaps is u8, so if it's already 0 the decrement still happens and wraps it to 255. The break only leaves the inner switch -- a later path entry can set info->indev back to a real device, and we end up returning with num_encaps == 255.
nft_dev_forward_path() then walks info.encap[] (size 2) up to num_encaps, which means an OOB stack read and a bogus count copied into the route descriptor.
Should only happen on a malformed bridge path stack, hence the WARN, but worth handling sanely. Move the decrement out of the WARN.
[ While at this, remove the WARN_ON_ONCE since this can only happen with a buggy bridge path stack --pablo ].
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2525478
- https://access.redhat.com/security/cve/CVE-2026-80634
- https://git.kernel.org/stable/c/2f55fa28011c97d6495d5787808db10a8c2d690d
- https://git.kernel.org/stable/c/e052f920773b73be49eb4d8702a9f85de7464363
- https://git.kernel.org/stable/c/547ea9f567498e4accc89e7816264f15a1a0629f
- https://git.kernel.org/stable/c/1b52aeb40c9f04bf50eeb4ea09142139d163e239
- https://git.kernel.org/stable/c/ee8440bb000fff4ef8acbfc99652851e9ca0a35b
- https://git.kernel.org/stable/c/9a4e3a9017ba3da2de187b72ed6545641a0d0a84