High [CVE-2026-89725] Linux kernel: Arbitrary code execution in media: cec: stm32 via RX overflow
This high-severity Red Hat Linux advisory covers CVE-2026-89725.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in the Linux kernel's `media: cec: stm32` driver. A remote attacker can exploit an out-of-bounds write vulnerability by sending an overlong Consumer Electronics Control (CEC) message without an end-of-message signal.
This causes the driver to write beyond an allocated buffer, potentially leading to arbitrary code execution or a denial of service. The vulnerability can be triggered without local privileges from the Interrupt Request (IRQ) thread.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-787.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 49 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 49 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 49 minutes ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.