CVE-2026-90391
CVE CVE-2026-90391EUVD EUVD-2026-82052Published 2026-09-17T16:09:25.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: lib/test_hmm: fail dmirror_fault() when the mirrored mm is gone dmirror_fault() is called from the dmirror_read() and dmirror_write() retry loops after dmirror_do_read() or dmirror_do_write() finds a missing device page table entry. If the mirrored mm has already exited, mmget_not_zero() fails. The current code returns 0 in that case, which tells the caller that faulting succeeded even though no page was faulted and no device page table entry was installed. The caller then retries the same address, hits -ENOENT again, and can loop forever without making progress. Return -EFAULT instead, so the ioctl fails when the mirrored mm is no longer faultable.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.12.110; patch: 5.10.270; patch: 0; b2ef9f5a5cb37643ca5def3516c546457074b882 <541a67f21ab807c8dbc0ea88d5a2eb73b2618090; b2ef9f5a5cb37643ca5def3516c546457074b882 <af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655; patch: 6.18.52; 5.8; patch: 6.6.157; b2ef9f5a5cb37643ca5def3516c546457074b882 <6a8024511ddf4877435c34fb3d6028aa8e590649; patch: 7.3-rc1; b2ef9f5a5cb37643ca5def3516c546457074b882 <2636569ea7c19d9a40db4a1e8d0a027bdacf1569; b2ef9f5a5cb37643ca5def3516c546457074b882 <50606ced303782f8715e2d0b98ca374ea498fa29; b2ef9f5a5cb37643ca5def3516c546457074b882 <a2074f86fc9653831e4fb7b711bb715db330f182; patch: 5.15.221; patch: 7.2.6; b2ef9f5a5cb37643ca5def3516c546457074b882 <701347e31aa607f3782403151a3125729d685275; b2ef9f5a5cb37643ca5def3516c546457074b882 <d8e64ffab01e032ae29159d27230ace8cf8bdc80; patch: 6.1.188
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
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- Linux — Linux
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