drm/i915/dmc: Harden DMC firmware payload parsing
Summary
| CVE | CVE-2026-99118 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-28 11:17:31 UTC |
| Updated | 2026-10-30 13:21:46 UTC |
| Description | 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) |
Risk And Classification
EPSS: 0.001850000 probability, percentile 0.081220000 (date 2026-11-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d 0e396088fa5c1f96ff43de29c2a2f8807078723d git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d 53068cf3851dd4e00e8e668563e0353d9d79a98b git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d e33921271d4438f4a24014f560e5ab297d7eda3f git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d 4589ad76a6b1011538600ad398baf0b7d73a1252 git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d eb7a0ba650d607976d1a0a5e7501d3f14b35d026 git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d git | Not specified |
| CNA | Linux | Linux | affected eb805623d8b161342ed9c9caf366f0a295041a6d 8bb1858db453cd4250e3b633f5d2d09206024ca6 git | Not specified |
| CNA | Linux | Linux | affected 4.2 | Not specified |
| CNA | Linux | Linux | unaffected 4.2 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.273 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.224 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.191 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.161 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.115 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.59 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.13 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/0e396088fa5c1f96ff43de29c2a2f8807078723d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/53068cf3851dd4e00e8e668563e0353d9d79a98b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e33921271d4438f4a24014f560e5ab297d7eda3f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4589ad76a6b1011538600ad398baf0b7d73a1252 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8bb1858db453cd4250e3b633f5d2d09206024ca6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/eb7a0ba650d607976d1a0a5e7501d3f14b35d026 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.