CVE-2026-93040 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20507280
- published5 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-93040 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: dw-edma: Serialize channel state checks
pause() and resume() read and update channel state without holding vc.lock, while the interrupt handlers update the same state under it. Take the same lock around those state checks so that request, status, and configured stay consistent.
For example, pause() can observe EDMA_ST_BUSY right before the interrupt handler completes the final descriptor and moves the channel to EDMA_ST_IDLE, and then record EDMA_REQ_PAUSE on an already idle channel. No further interrupt will acknowledge the request, and since issue_pending() requires EDMA_REQ_NONE, the channel is wedged for good: terminate_all() leaves the stale request behind, so even reconfiguring the channel does not recover it.
issue_pending() already runs under vc.lock, but it tests configured before taking it. Move that test under the lock as well, so configured, request, and status are evaluated as one channel-state snapshot.
References
- https://security-tracker.debian.org/tracker/CVE-2026-93040
- https://git.kernel.org/stable/c/2d76b91deeab973dd8a8c2ee587ce27f881de768
- https://git.kernel.org/stable/c/3001cfcee30dcc81f8b3774319c12067f126e49a
- https://git.kernel.org/stable/c/6fc436e1500c5e4f0dde2a3dbadf6d898057be8f
- https://git.kernel.org/stable/c/b6293a8a38f4d5866ce1a264c138265a02e4c53a
- https://git.kernel.org/stable/c/be0072af8ce6e9458cc586e0e8b41a251e7d4316
- https://git.kernel.org/stable/c/da16a02f0998a0d455ce6265b836b29ad92e6e58
- https://git.kernel.org/stable/c/f7d1619f3e10c619b62c6cd6d95371b5c526c85a
- https://git.kernel.org/stable/c/fe0ffa0190e862ed71e8c1a476090f648c9cb7d9