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CVE-2026-100070

Unknown

Last modified

CVE-2026-100070 is a vulnerability of currently unknown severity. 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?.

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 Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= c978cd3a937141deaf7995b849824af6dacdeae7, < 6828aca3d82717c2fda92af81c0dda642bc2b465; >= c978cd3a937141deaf7995b849824af6dacdeae7, < 2703f5ea8d85bc729f433ac09ee902084c947122; >= c978cd3a937141deaf7995b849824af6dacdeae7, < 0f4d30e2e49f343fc28ba1e259fd22969b940c46; >= c978cd3a937141deaf7995b849824af6dacdeae7, < 810da5a63549531da78348b0a4545042d84e01e2; >= c978cd3a937141deaf7995b849824af6dacdeae7, < 668cc1c30caedc63070b10d17d5514748988a140; >= c978cd3a937141deaf7995b849824af6dacdeae7, < e70d48fcf8382581162608a4a322919bfd22aef3; >= c978cd3a937141deaf7995b849824af6dacdeae7, < c408d416618ebb8a95e3097a13f3b793ea9272ee; >= c978cd3a937141deaf7995b849824af6dacdeae7, < 16aecbe3036f6097c26b51b12e4c1cf207769690
LinuxLinux2.6.26

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-100070?
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?
How severe is CVE-2026-100070?
Severity scoring for CVE-2026-100070 is pending analysis.
How do I fix CVE-2026-100070?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST