Unspecified impact via DMC payload size overflow
Published Oct 28, 2026 · Updated Oct 28, 2026
Integer overflow in Linux i915 DMC firmware parsing allows attackers to cause unspecified impact via malformed firmware headers. The parse_dmc_fw_header function multiplies fw_size by four without overflow validation, accepts zero payload sizes and MMIO counts, and records firmware size before allocation succeeds. Exposure requires malformed firmware to reach the driver on DMC-capable hardware; published evidence does not establish attacker privileges or a specific crash, disclosure, or execution consequence.
Summary
What happened
Integer overflow in Linux i915 DMC firmware parsing allows attackers to cause unspecified impact via malformed firmware headers. The parse_dmc_fw_header function multiplies fw_size by four without overflow validation, accepts zero payload sizes and MMIO counts, and records firmware size before allocation succeeds. Exposure requires malformed firmware to reach the driver on DMC-capable hardware; published evidence does not establish attacker privileges or a specific crash, disclosure, or execution consequence.
The record
- CVE
- CVE-2026-99118
- Published
- Oct 28, 2026
- Updated
- Oct 28, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Oct 28, 2026CVE publishedPublication date reported by the CVE source.
- Oct 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.2
- Affected versionversion=eb805623d8b161342ed9c9caf366f0a295041a6d <05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d
- Affected versionversion=eb805623d8b161342ed9c9caf366f0a295041a6d <8bb1858db453cd4250e3b633f5d2d09206024ca6
- Affected versionversion=eb805623d8b161342ed9c9caf366f0a295041a6d <dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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