CVE-2026-43494
Description
In the Linux kernel, the following vulnerability has been resolved: net/rds: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nents and frees them again. Fix this by properly resetting op_nents when it should be in rds_message_zcopy_from_user().
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 |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | affected | |
| debian | trixie | fixed | 6.12.90-2 |
| debian | sid | fixed | 7.0.10-1 |
| windows | affected | |
References
- https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353
- https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479
- https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51
- https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799
- https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4
- http://www.openwall.com/lists/oss-security/2026/05/21/2
- https://www.suse.com/security/cve/CVE-2026-43494.html
- https://security-tracker.debian.org/tracker/CVE-2026-43494
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43494
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.