PT-2026-30573 · Linux · Linux

Published 2026-04-06 · Updated 2026-04-06 · CVE-2026-31405

NVD

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.

Related Identifiers

CVE-2026-31405

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-31405 · Security Note
• https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647 · Note
• https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92 · Note
• https://twitter.com/CVEnew/status/2041076958440689956 · Twitter Post
• https://twitter.com/infoflowcloud/status/2041077651297739224 · Twitter Post
• https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe · Note
• https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8 · Note
• https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30 · Note
• https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e · Note