Skip to main content
cve.nowby Sazabi
← All vulnerabilities
CVE-2026-43452

netfilter: x_tables: guard option walkers against 1-byte tail reads

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in c2a445367a496a3c25dbc940c10c8bd1cfd4c14a; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in ae1e1267650638136b84c23f2b31250f0ccb6823; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in c39f84e4be1be63fc60ca7141ea7b76edcea5907; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in 9b94f0e42ed248eb31929da84ed9f5310d7ff540; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in 5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in bc18551c6169eac5ed813778d3e3e484002dbbe5; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in d04800323336eebf441d153f43234eac9b833d36; From 2e4e6a17af35be359cc8f1c924f8f198fbd478cc · fixed in cfe770220ac2dbd3e104c6b45094037455da81d4

  • Linux Linux

    2.6.16

  • KernelLinux

    From 2.6.16 · fixed in 5.10.253; From 5.11.0 · fixed in 5.15.203; From 5.16.0 · fixed in 6.1.167; From 6.2.0 · fixed in 6.6.130; From 6.7.0 · fixed in 6.12.78; From 6.13.0 · fixed in 6.18.19; From 6.19.0 · fixed in 6.19.9

References 8

git.kernel.org