CVE-2026-68107 PUBLISHED

drm/amdgpu/vcn4: avoid rereading IB param length

Assigner: Linux
Reserved: 30.07.2026 Published: 10.08.2026 Updated: 10.08.2026

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)

Vendor	Linux
Product	Linux
Versions	Default: unaffected affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to bbbe6a2a8d8dc87243438d3ffea2083b52d882d9 (excl.) affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to ff6aa542d91d76a185f69bd1997b94a560ff5f6b (excl.) affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to bd868c077f67589ed2a714307ceaade5f246e302 (excl.) affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to c309626bf91fa0a0b583575654e6e14e81f818a3 (excl.) affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 3b4082fabc67c9780b06eb959e59dd92fa79c0f0 (excl.) affected from 0 to 6.6.148 (excl.) affected from 0 to 6.12.101 (excl.) affected from 0 to 6.18.42 (excl.) affected from 0 to 7.1.6 (excl.)

Vendor	Linux
Product	Linux
Versions	Default: affected unaffected from 6.6.148 to 6.6.* (incl.) unaffected from 6.12.101 to 6.12.* (incl.) unaffected from 6.18.42 to 6.18.* (incl.) unaffected from 7.1.6 to 7.1.* (incl.) unaffected from 7.2-rc2 to * (incl.)