drm/amdgpu/vcn4: avoid rereading IB param length (CVE-2026-68107) | HOL Guard CVE

High · CVSS 8.8CVE-2026-68107

drm/amdgpu/vcn4: avoid rereading IB param length

Answer in brief

CVE-2026-68107 records a High severity (CVSS 8.8) vulnerability in drm/amdgpu/vcn4: avoid rereading IB param length. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.

Published Aug 10, 2026Updated Aug 17, 2026Source checked Sep 24, 2026First seen by HOL Aug 10, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. 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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bbbe6a2a8d8dc87243438d3ffea2083b52d882d9 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ff6aa542d91d76a185f69bd1997b94a560ff5f6b \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bd868c077f67589ed2a714307ceaade5f246e302 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c309626bf91fa0a0b583575654e6e14e81f818a3 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3b4082fabc67c9780b06eb959e59dd92fa79c0f0 \|\| >=0 <6.6.148 \|\| >=0 <6.12.101 \|\| >=0 <6.18.42 \|\| >=0 <7.1.6	bbbe6a2a8d8dc87243438d3ffea2083b52d882d9, ff6aa542d91d76a185f69bd1997b94a560ff5f6b, bd868c077f67589ed2a714307ceaade5f246e302, c309626bf91fa0a0b583575654e6e14e81f818a3, 3b4082fabc67c9780b06eb959e59dd92fa79c0f0, 6.6.148, 6.12.101, 6.18.42, 7.1.6
Linux/Linuxgeneric	>=cfdde9197ecd957281507be99af172671a57755c <bbbe6a2a8d8dc87243438d3ffea2083b52d882d9 \|\| >=6dc4eddeb7e6cca7e1ab32cafbda79d06e652d84 <ff6aa542d91d76a185f69bd1997b94a560ff5f6b \|\| >=2b10cb58d7a3fd621ec9b2ba765a092e562ef998 <bd868c077f67589ed2a714307ceaade5f246e302 \|\| >=2b10cb58d7a3fd621ec9b2ba765a092e562ef998 <c309626bf91fa0a0b583575654e6e14e81f818a3 \|\| >=2b10cb58d7a3fd621ec9b2ba765a092e562ef998 <3b4082fabc67c9780b06eb959e59dd92fa79c0f0 \|\| b1dc92f55b22a80ded8f0263c9ef4ba902303895 \|\| >=6.6.107 <6.6.148 \|\| >=6.12.48 <6.12.101 \|\| >=6.16.8 <6.17	bbbe6a2a8d8dc87243438d3ffea2083b52d882d9, ff6aa542d91d76a185f69bd1997b94a560ff5f6b, bd868c077f67589ed2a714307ceaade5f246e302, c309626bf91fa0a0b583575654e6e14e81f818a3, 3b4082fabc67c9780b06eb959e59dd92fa79c0f0, 6.6.148, 6.12.101, 6.17
Linux/Linuxgeneric	6.17	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to bbbe6a2a8d8dc87243438d3ffea2083b52d882d9; Linux/Linux to bbbe6a2a8d8dc87243438d3ffea2083b52d882d9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: avoid rereading IB param length Reuse the parameter length returned by vcn_v4_0_enc_find_ib_param() instead of rereading it from the IB. This avoids a potential TOCTOU issue if the IB contents change between reads. (cherry picked from commit dbb02b4755f8c1f3773263f2d779872c1c0c073a)

Quoted source text, attributed separately from HOL analysis.