Bug 2513415 (CVE-2026-68107) - CVE-2026-68107 kernel: drm/amdgpu/vcn4: avoid rereading IB param length
Summary: CVE-2026-68107 kernel: drm/amdgpu/vcn4: avoid rereading IB param length
Keywords:
Status: NEW
Alias: CVE-2026-68107
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-10 12:36 UTC by OSIDB Bzimport
Modified: 2026-08-12 09:50 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-08-10 12:36:06 UTC 
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)
Comment 1 Mauro Matteo Cascella 2026-08-11 16:35:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081053-CVE-2026-68107-cb95@gregkh/T
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