Answer in brief
CVE-2026-68445 records a Unknown severity vulnerability in drm/vc4: Prevent shader BO mappings from becoming writable. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=463873d5701427f2964a0b4b72c45f1f14b6df87 <9f0ee411fc2d76333d6087c5862ffa907cf7a175 || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <019e6ad247f7fd038d2e009789f6d9bfcccb1ae7 || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <6deaa317201851c644c431b57682e54d06b35838 || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <fe168ef1d232d734d9998fd74822e2e20930dfff || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <0c9e6367639548307d3f578f6943ce72c9d39087 | 9f0ee411fc2d76333d6087c5862ffa907cf7a175, 019e6ad247f7fd038d2e009789f6d9bfcccb1ae7, 6deaa317201851c644c431b57682e54d06b35838, fe168ef1d232d734d9998fd74822e2e20930dfff, 0c9e6367639548307d3f578f6943ce72c9d39087 |
| Linux/Linuxgeneric | 4.5 | Not reported |
Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68445 records a Unknown severity vulnerability in drm/vc4: Prevent shader BO mappings from becoming writable. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=463873d5701427f2964a0b4b72c45f1f14b6df87 <9f0ee411fc2d76333d6087c5862ffa907cf7a175 || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <019e6ad247f7fd038d2e009789f6d9bfcccb1ae7 || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <6deaa317201851c644c431b57682e54d06b35838 || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <fe168ef1d232d734d9998fd74822e2e20930dfff || >=463873d5701427f2964a0b4b72c45f1f14b6df87 <0c9e6367639548307d3f578f6943ce72c9d39087 | 9f0ee411fc2d76333d6087c5862ffa907cf7a175, 019e6ad247f7fd038d2e009789f6d9bfcccb1ae7, 6deaa317201851c644c431b57682e54d06b35838, fe168ef1d232d734d9998fd74822e2e20930dfff, 0c9e6367639548307d3f578f6943ce72c9d39087 |
| Linux/Linuxgeneric | 4.5 | Not reported |
Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
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.
Quoted source text, attributed separately from HOL analysis.