Critical severity · published Apr 6, 2026
CVE-2026-31405
media: dvb-net: fix OOB access in ULE extension header tables
9.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
2.6.12.1 before 5.10.253; 5.11 before 5.15.203; 5.16 before 6.1.167; 6.2 before 6.6.130; 6.7 before 6.12.78; 6.13 before 6.18.19; +8 more · source: NVD
LI
Linux · Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e51238718217c4abdb3ccc3b0c0cde265c7ec629; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b2bd2ee73b697c177157bba534e1b1064c2e66a0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 29ef43ceb121d67b87f4cbb08439e4e9e732eff8; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1a6da3dbb9985d00743073a1cc1f96e59f5abc30; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 145e50c2c700fa52b840df7bab206043997dd18e; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe; +3 more · source: vendor