CVE-2026-31405

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e51238718217c4abdb3ccc3b0c0cde265c7ec629affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b2bd2ee73b697c177157bba534e1b1064c2e66a0affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 29ef43ceb121d67b87f4cbb08439e4e9e732eff8affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1a6da3dbb9985d00743073a1cc1f96e59f5abc30affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 145e50c2c700fa52b840df7bab206043997dd18eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8bde543d2a5f935ba2a6a6325a2e02f8a9256fbeaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f2b65dcb78c8990e4c68a906627433be1fe38a92affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 24d87712727a5017ad142d63940589a36cd25647affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.78 <= 6.12.*unaffected
LinuxLinux6.18.19 <= 6.18.*unaffected
LinuxLinux6.19.9 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References