CVE-2026-31677
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 6.19.14-1 |
| debian | sid | fixed | 6.19.14-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 6.12.83 | |
| linux-kernel | 7.0 | affected | |
| almalinux | 9 | fixed | kernel-doc-5.14.0-687.5.3.el9_8.noarch.rpm |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gcp | | |
References
- https://access.redhat.com/errata/RHSA-2026:19225
- https://git.kernel.org/stable/c/07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453
- https://git.kernel.org/stable/c/4a264b2614c73c96666e196bbabe0cead52bdba7
- https://git.kernel.org/stable/c/8eceab19eba9dcbfd2a0daec72e1bf48aa100170
- https://git.kernel.org/stable/c/9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9
- https://www.suse.com/security/cve/CVE-2026-31677.html
- https://security-tracker.debian.org/tracker/CVE-2026-31677
- https://bugzilla.redhat.com/2436779
- https://bugzilla.redhat.com/2460538
- https://bugzilla.redhat.com/2461763
- https://bugzilla.redhat.com/2467771
- https://errata.almalinux.org/9/ALSA-2026-19225.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.