git.kernel.org
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git CVE-2026-68445
HIGH
drm/vc4: Prevent shader BO mappings from becoming writable
Record summary
CVE-2026-68445 has a selected CVSS score of 7.8 (high).
Description
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.
Description source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
LinuxBrowse Linux / LinuxDefault status: unaffected, affected | CVE List | 463873d5701427f2964a0b4b72c45f1f14b6df87 to < 9f0ee411fc2d76333d6087c5862ffa907cf7a175 | affected |
| 463873d5701427f2964a0b4b72c45f1f14b6df87 to < 019e6ad247f7fd038d2e009789f6d9bfcccb1ae7 | affected | ||
| 463873d5701427f2964a0b4b72c45f1f14b6df87 to < 6deaa317201851c644c431b57682e54d06b35838 | affected | ||
| 463873d5701427f2964a0b4b72c45f1f14b6df87 to < fe168ef1d232d734d9998fd74822e2e20930dfff | affected | ||
| 463873d5701427f2964a0b4b72c45f1f14b6df87 to < 0c9e6367639548307d3f578f6943ce72c9d39087 | affected | ||
| 4.5 | affected | ||
| Before 4.5 | unaffected | ||
| 6.6.148 to ≤ 6.6.* | unaffected | ||
| 6.12.101 to ≤ 6.12.* | unaffected | ||
| 6.18.42 to ≤ 6.18.* | unaffected | ||
| 7.1.6 to ≤ 7.1.* | unaffected | ||
| 7.2-rc5 to ≤ * | unaffected | ||
KernelBrowse Linux / Kernel | OSV | 4.5.0 to < 6.6.148 · Fixed in 6.6.148 | affected |
| 6.7.0 to < 6.12.101 · Fixed in 6.12.101 | affected | ||
| 6.13.0 to < 6.18.42 · Fixed in 6.18.42 | affected | ||
| 6.19.0 to < 7.1.6 · Fixed in 7.1.6 | affected |
References
8git.kernel.org
https://git.kernel.org/stable/c/019e6ad247f7fd038d2e009789f6d9bfcccb1ae7 git.kernel.org
https://git.kernel.org/stable/c/0c9e6367639548307d3f578f6943ce72c9d39087 git.kernel.org
https://git.kernel.org/stable/c/6deaa317201851c644c431b57682e54d06b35838 git.kernel.org
https://git.kernel.org/stable/c/9f0ee411fc2d76333d6087c5862ffa907cf7a175 git.kernel.org
https://git.kernel.org/stable/c/fe168ef1d232d734d9998fd74822e2e20930dfff github.com
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68445.json nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-68445