CVE-2026-68445
CVE CVE-2026-68445EUVD EUVD-2026-57020Published 2026-08-12T00:07:36.000ZLast changed 2026-08-17T05:05:42.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Prevent shader BO mappings from becoming writable vc4_gem_object_mmap() rejects a writable mapping of a validated shader BO, but leaves VM_MAYWRITE set. Userspace can map the BO read-only and then turn it writable with mprotect(). Validated shader BOs must stay read-only: the validator checks the instructions once and the GPU trusts them afterwards. A writable mapping lets userspace rewrite the code after validation, bypassing the validator. Clear VM_MAYWRITE on the read-only path so the mapping cannot be upgraded, as i915 already does for its read-only objects.
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 463873d5701427f2964a0b4b72c45f1f14b6df87 <0c9e6367639548307d3f578f6943ce72c9d39087; patch: 6.6.148; 463873d5701427f2964a0b4b72c45f1f14b6df87 <9f0ee411fc2d76333d6087c5862ffa907cf7a175; patch: 6.12.101; 463873d5701427f2964a0b4b72c45f1f14b6df87 <fe168ef1d232d734d9998fd74822e2e20930dfff; 463873d5701427f2964a0b4b72c45f1f14b6df87 <6deaa317201851c644c431b57682e54d06b35838; patch: 6.18.42; patch: 0; 4.5; 463873d5701427f2964a0b4b72c45f1f14b6df87 <019e6ad247f7fd038d2e009789f6d9bfcccb1ae7; patch: 7.2; patch: 7.1.6
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
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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