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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-31405
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-31405.html
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.170-1 |
| debian | forky | fixed | 6.19.10-1 |
| debian | sid | fixed | 6.19.10-1 |
| debian | trixie | fixed | 6.12.85-1 |
| debian | bullseye | fixed | 6.1.170-1~deb11u1 |
| linux-kernel | affected | 5.10.253 | |
| linux-kernel | 2.6.12 | affected | |
| linux-kernel | 7.0 | affected | |
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
- https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0
- https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629
- https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92
- https://www.suse.com/security/cve/CVE-2026-31405.html
- https://security-tracker.debian.org/tracker/CVE-2026-31405
CWEs
CWE-125
Verify integrity in audit chain (admin only). AS-IS.