CVE-2026-43452 (GCVE-0-2026-43452)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-10-19 19:26
VLAI
Title
netfilter: x_tables: guard option walkers against 1-byte tail reads
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:17 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < c2a445367a496a3c25dbc940c10c8bd1cfd4c14a (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < ae1e1267650638136b84c23f2b31250f0ccb6823 (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < c39f84e4be1be63fc60ca7141ea7b76edcea5907 (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < 9b94f0e42ed248eb31929da84ed9f5310d7ff540 (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < 5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < bc18551c6169eac5ed813778d3e3e484002dbbe5 (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < d04800323336eebf441d153f43234eac9b833d36 (git)
Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < cfe770220ac2dbd3e104c6b45094037455da81d4 (git)
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Linux Linux Affected: 2.6.16
Unaffected: 0 , < 2.6.16 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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}



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