CVE-2026-93042dmaengine: dw-edma: Terminate all descriptors without callbacks
- 8.8HighCVSS base score
- 0.40%Exploitation in 30 daysEPSS · top 65% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: dw-edma: Terminate all descriptors without callbacks The DMA Engine client documentation says in the "Terminate APIs" section of Documentation/driver-api/dmaengine/client.rst: "No callback functions will be called for any incomplete transfers." dw-edma instead calls vchan_cookie_complete() when a deferred STOP reaches the interrupt handler. This schedules a callback for the active descriptor and leaves other issued or submitted descriptors queued. A late callback after dmaengine_terminate_sync() can dereference client state that has already been freed, while leftover descriptors may later restart into reused buffers or leak. Move all issued and submitted descriptors to the terminated list whenever termination completes. For a pending STOP, do this from both the DONE and ABORT paths. Complete their cookies in order without scheduling callbacks. A STOP can remain pending until the running transfer raises an interrupt. Make device_synchronize() wait for such a pending STOP to complete before releasing terminated descriptors. Reuse it from free_chan_resources(), then release the remaining virt-dma resources. Sleep instead of busy-polling while waiting, and warn if the existing timeout expires.
Timeline
ID reserved
By Linux
Published
- 43 days later
· 43 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.40% · top 65% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf – < da56839aced48ecb70033962d7ea98f55b0c5656
- affected e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf – < 65e387b95d3855aa894ac729e1778e5bcb9083cb
- affected e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf – < 4793f9099a1cadf4e37f3a03d524af6bce88a0ea
- affected e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf – < be87d86537de7ea6fd025f41033d2faff880973f
- affected e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf – < f3ec6702a1d216be61f692cc0a983d6c8fb5ebf7
- affected e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf – < 99109a51efd28c9a661fbfb9469b023c517b31d1
- affected 5.3
- unaffected < 5.3
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/da56839aced48ecb70033962d7ea98f55b0c5656 (opens in a new tab)
- https://git.kernel.org/stable/c/65e387b95d3855aa894ac729e1778e5bcb9083cb (opens in a new tab)
- https://git.kernel.org/stable/c/4793f9099a1cadf4e37f3a03d524af6bce88a0ea (opens in a new tab)
- https://git.kernel.org/stable/c/be87d86537de7ea6fd025f41033d2faff880973f (opens in a new tab)
- https://git.kernel.org/stable/c/f3ec6702a1d216be61f692cc0a983d6c8fb5ebf7 (opens in a new tab)
- https://git.kernel.org/stable/c/99109a51efd28c9a661fbfb9469b023c517b31d1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-82152 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-93042)Record last updated .