CRITICAL: CVE-2026-31405 (CVSS 9.8) — multiple products

CVE: CVE-2026-31405

CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

_See vendor advisory_

Summary

In the Linux kernel, the following vulnerability has been resolved:

media: dvb-net: fix OOB access in ULE extension header tables

The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables

in handle_one_ule_extension() are declared with 255 elements (valid

indices 0-254), but the index htype is derived from network-controlled

data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When

htype equals 255, an out-of-bounds read occurs on the function pointer

table, and the OOB value may be called as a function pointer.

Add a bounds check on htype against the array size before either table

is accessed. Out-of-range values now cause the SNDU to be discarded.

Verified Sources

References

https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e
https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30
https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647
https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8
https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe
https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0
https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629
https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._

Lyrie Verdict

A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.

#critical