drm/i915/dmc: Harden DMC firmware payload parsing
CVE-2026-99118 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99118, released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel, the following vulnerability has been resolved: drm/i915/dmc: Harden DMC firmware payload parsing Validate the conversion of the DMC firmware size from dwords to bytes using check_mul_overflow() before calculating the firmware payload size. Reject zero-length payloads and zero MMIO counts in the DMC firmware header so malformed firmware is caught early. Also set dmc_fw_size only after the payload allocation succeeds. (cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 13.5 (trixie) | 6.12.115-2 | DEBIAN-CVE-2026-99118 | Nov 3, 2026 |
| linux · Debian 14 | 7.2.13-1 | DEBIAN-CVE-2026-99118 | Nov 3, 2026 |
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