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CVE-2026-31405

CRITICAL
9.8
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-31405
State
PUBLISHED
Assigner
Linux
Reserved
2026-03-09 15:48 UTC
Published
2026-04-06 07:33 UTC
Last updated
2026-05-11 22:08 UTC
Vendor / Product
Linux / Linux
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products (2)
VendorProductPlatformVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e51238718217c4abdb3ccc3b0c0cde265c7ec629, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b2bd2ee73b697c177157bba534e1b1064c2e66a0, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 29ef43ceb121d67b87f4cbb08439e4e9e732eff8, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1a6da3dbb9985d00743073a1cc1f96e59f5abc30 …
Linux Linux 2.6.12, 0 < 2.6.12, 5.10.253 ≤ 5.10.*, 5.15.203 ≤ 5.15.* …
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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