CVE-2026-31405

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.

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