CVE-2026-31405

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

State: Published
Severity: 9.8 Critical
Published: Apr 6, 2026
Updated: Aug 5, 2026
Reserved: Mar 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e51238718217c4abdb3ccc3b0c0cde265c7ec629Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b2bd2ee73b697c177157bba534e1b1064c2e66a0Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 29ef43ceb121d67b87f4cbb08439e4e9e732eff8Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1a6da3dbb9985d00743073a1cc1f96e59f5abc30Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 145e50c2c700fa52b840df7bab206043997dd18eAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8bde543d2a5f935ba2a6a6325a2e02f8a9256fbeAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f2b65dcb78c8990e4c68a906627433be1fe38a92Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24d87712727a5017ad142d63940589a36cd25647Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.78 through 6.12.Not affected 6.18.19 through 6.18.Not affected 6.19.9 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e51238718217c4abdb3ccc3b0c0cde265c7ec629Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b2bd2ee73b697c177157bba534e1b1064c2e66a0Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 29ef43ceb121d67b87f4cbb08439e4e9e732eff8Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1a6da3dbb9985d00743073a1cc1f96e59f5abc30Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 145e50c2c700fa52b840df7bab206043997dd18eAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8bde543d2a5f935ba2a6a6325a2e02f8a9256fbeAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f2b65dcb78c8990e4c68a906627433be1fe38a92Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24d87712727a5017ad142d63940589a36cd25647Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.78 through 6.12.*Not affected
6.18.19 through 6.18.*Not affected
6.19.9 through 6.19.*Not affected
7.0 and laterNot affected

References

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