CVE-2026-31405: media: dvb-net: fix OOB access in ULE extension header tables
Vulnerability summary
CVE-2026-31405 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 46.6% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 53 · Related 51Timeline
- 06-04-2026PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
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 metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.56%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
Decrease -0.20 pp
From 0.76% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu157 products
- linux< 3.13.0-215.266 | < 4.4.0-284.318 | < 4.15.0-254.266 | < 5.4.0-234.254 | < 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1157.163 | < 4.4.0-1195.210 | < 4.15.0-1195.208 | < 5.4.0-1162.173 | < 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e51238718217c4abdb3ccc3b0c0cde265c7ec629 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b2bd2ee73b697c177157bba534e1b1064c2e66a0 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 29ef43ceb121d67b87f4cbb08439e4e9e732eff8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1a6da3dbb9985d00743073a1cc1f96e59f5abc30 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 145e50c2c700fa52b840df7bab206043997dd18e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f2b65dcb78c8990e4c68a906627433be1fe38a92 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 24d87712727a5017ad142d63940589a36cd25647 | 2.6.12
- linux_kernel≥ 2.6.12.1, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.78 | ≥ 6.13, < 6.18.19 | ≥ 6.19, < 6.19.9 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 7.0:rc1 | 7.0:rc2
Debian1 product
- linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.10-1
3 vendors · 160 products
