CVE-2025-40172accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()
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In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages() Currently, if find_and_map_user_pages() takes a DMA xfer request from the user with a length field set to 0, or in a rare case, the host receives QAIC_TRANS_DMA_XFER_CONT from the device where resources->xferred_dma_size is equal to the requested transaction size, the function will return 0 before allocating an sgt or setting the fields of the dma_xfer struct. In that case, encode_addr_size_pairs() will try to access the sgt which will lead to a general protection fault. Return an EINVAL in case the user provides a zero-sized ALP, or the device requests continuation after all of the bytes have been transferred.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c builds before 48b1d42286bfef7628b1d6c8c28d4e456c90f725; from 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c before 551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede; 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c builds before 1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6; 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c builds before 11f08c30a3e4157305ba692f1d44cca5fc9a8fca; d410a96e5cb8c1ec7049c83f2edcd8bbfaf5d9b3; from 6.4.12 before 6.5 | CNA record |
References
- https://git.kernel.org/stable/c/48b1d42286bfef7628b1d6c8c28d4e456c90f725
- https://git.kernel.org/stable/c/551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede
- https://git.kernel.org/stable/c/1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6
- https://git.kernel.org/stable/c/11f08c30a3e4157305ba692f1d44cca5fc9a8fca
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.