Linux kernel OOB read in dvb-net ULE header table
CVE-2026-31405 Published on April 6, 2026
media: dvb-net: fix OOB access in ULE extension header tables
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.
Products Associated with CVE-2026-31405
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 29ef43ceb121d67b87f4cbb08439e4e9e732eff8 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 1a6da3dbb9985d00743073a1cc1f96e59f5abc30 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 145e50c2c700fa52b840df7bab206043997dd18e is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below f2b65dcb78c8990e4c68a906627433be1fe38a92 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 24d87712727a5017ad142d63940589a36cd25647 is affected.
- Version 2.6.12 is affected.
- Before 2.6.12 is unaffected.
- Version 6.1.167, <= 6.1.* is unaffected.
- Version 6.6.130, <= 6.6.* is unaffected.
- Version 6.12.78, <= 6.12.* is unaffected.
- Version 6.18.19, <= 6.18.* is unaffected.
- Version 6.19.9, <= 6.19.* is unaffected.
- Version 7.0-rc3, <= * is unaffected.