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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-100070

netfilter: nf_nat_sip: rewind offset when NAT shrinks the packet

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_nat_sip: rewind offset when NAT shrinks the packet sashiko says: If map_addr() changes the packet length, such as when the public NAT IP string is shorter or longer than the internal IP, coff will still point to the offset relative to the pre-mangled packet. If the packet shrinks, coff could overshoot the correct position, potentially causing the next ct_sip_parse_header_uri() call to silently skip bytes and miss subsequent Contact headers. Could this lead to a failure to NAT those subsequent headers and leak internal network details?

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

  • c978cd3a937141deaf7995b849824af6dacdeae7 to < 6828aca3d82717c2fda92af81c0dda642bc2b465affected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < 2703f5ea8d85bc729f433ac09ee902084c947122affected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < 0f4d30e2e49f343fc28ba1e259fd22969b940c46affected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < 810da5a63549531da78348b0a4545042d84e01e2affected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < 668cc1c30caedc63070b10d17d5514748988a140affected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < e70d48fcf8382581162608a4a322919bfd22aef3affected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < c408d416618ebb8a95e3097a13f3b793ea9272eeaffected
  • c978cd3a937141deaf7995b849824af6dacdeae7 to < 16aecbe3036f6097c26b51b12e4c1cf207769690affected

Linux Linux

Default version status: affected

  • 2.6.26affected
  • 0 to < 2.6.26unaffected
  • 5.10.270 to ≤ 5.10.*unaffected
  • 5.15.221 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.110 to ≤ 6.12.*unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References