CVE-2026-68445
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
drm/vc4: Prevent shader BO mappings from becoming writable
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 463873d5701427f2964a0b4b72c45f1f14b6df87 | affected | git | 9f0ee411fc2d76333d6087c5862ffa907cf7a175 | Unavailable | None listed |
| 463873d5701427f2964a0b4b72c45f1f14b6df87 | affected | git | 019e6ad247f7fd038d2e009789f6d9bfcccb1ae7 | Unavailable | None listed |
| 463873d5701427f2964a0b4b72c45f1f14b6df87 | affected | git | 6deaa317201851c644c431b57682e54d06b35838 | Unavailable | None listed |
| 463873d5701427f2964a0b4b72c45f1f14b6df87 | affected | git | fe168ef1d232d734d9998fd74822e2e20930dfff | Unavailable | None listed |
| 463873d5701427f2964a0b4b72c45f1f14b6df87 | affected | git | 0c9e6367639548307d3f578f6943ce72c9d39087 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.5 | Unavailable | None listed |
| 6.6.148 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.101 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.42 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.6 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |