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CVE-2026-31405

9.8 · CRITICAL

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[]…

Published Apr 6, 2026CWE-125EPSS 0.55%

Overview

CVE-2026-31405 is a critical-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18eRefgit.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30Refgit.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647Refgit.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8Refgit.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbeRefgit.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0Refgit.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629Refgit.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31405?

CVE-2026-31405 is a critical-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-31405?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-31405?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-31405?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31405 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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