{"id":"CVE-2026-99118","title":"drm/i915/dmc: Harden DMC firmware payload parsing","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/dmc: Harden DMC firmware payload parsing\n\nValidate the conversion of the DMC firmware size from dwords to bytes\nusing check_mul_overflow() before calculating t…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= eb805623d8b161342ed9c9caf366f0a295041a6d < dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa","Linux >= eb805623d8b161342ed9c9caf366f0a295041a6d < 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d","Linux >= eb805623d8b161342ed9c9caf366f0a295041a6d < 8bb1858db453cd4250e3b633f5d2d09206024ca6","Linux 4.2"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T10:34:34.627Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99118","references":[{"url":"https://git.kernel.org/stable/c/dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa"},{"url":"https://git.kernel.org/stable/c/05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d"},{"url":"https://git.kernel.org/stable/c/8bb1858db453cd4250e3b633f5d2d09206024ca6"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T11:09:40.449Z","slug":"CVE-2026-99118","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/dmc: Harden DMC firmware payload parsing\n\nValidate the conversion of the DMC firmware size from dwords to bytes\nusing check_mul_overflow() before calculating the firmware payload size.\n\nReject zero-length payloads and zero MMIO counts in the DMC firmware\nheader so malformed firmware is caught early. Also set dmc_fw_size only\nafter the payload allocation succeeds.\n\n(cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)\n\n## Affected\n\n- `Linux >= eb805623d8b161342ed9c9caf366f0a295041a6d < dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa`\n- `Linux >= eb805623d8b161342ed9c9caf366f0a295041a6d < 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d`\n- `Linux >= eb805623d8b161342ed9c9caf366f0a295041a6d < 8bb1858db453cd4250e3b633f5d2d09206024ca6`\n- `Linux 4.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}