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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2026-43452

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < c2a445367a496a3c25dbc940c10c8bd1cfd4c14aaffected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < ae1e1267650638136b84c23f2b31250f0ccb6823affected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < c39f84e4be1be63fc60ca7141ea7b76edcea5907affected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < 9b94f0e42ed248eb31929da84ed9f5310d7ff540affected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < 5b18b8b35c7cded2d17b2b2604c9b0694ff48d1caffected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < bc18551c6169eac5ed813778d3e3e484002dbbe5affected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < d04800323336eebf441d153f43234eac9b833d36affected
  • 2e4e6a17af35be359cc8f1c924f8f198fbd478cc to < cfe770220ac2dbd3e104c6b45094037455da81d4affected

Linux Linux

Default version status: affected

  • 2.6.16affected
  • 0 to < 2.6.16unaffected
  • 5.10.253 to ≤ 5.10.*unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.1.167 to ≤ 6.1.*unaffected
  • 6.6.130 to ≤ 6.6.*unaffected
  • 6.12.78 to ≤ 6.12.*unaffected
  • 6.18.19 to ≤ 6.18.*unaffected
  • 6.19.9 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References