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…
Does this matter?
Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own.
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?
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.11% probability · 2th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS moved from 0.2% on 26 September 2026 to 0.1% on 26 October 2026.
References
- https://git.kernel.org/stable/c/0f4d30e2e49f343fc28ba1e259fd22969b940c46Patch
- https://git.kernel.org/stable/c/16aecbe3036f6097c26b51b12e4c1cf207769690Patch
- https://git.kernel.org/stable/c/2703f5ea8d85bc729f433ac09ee902084c947122Patch
- https://git.kernel.org/stable/c/668cc1c30caedc63070b10d17d5514748988a140Patch
- https://git.kernel.org/stable/c/6828aca3d82717c2fda92af81c0dda642bc2b465Patch
- https://git.kernel.org/stable/c/810da5a63549531da78348b0a4545042d84e01e2Patch
- https://git.kernel.org/stable/c/c408d416618ebb8a95e3097a13f3b793ea9272eePatch
- https://git.kernel.org/stable/c/e70d48fcf8382581162608a4a322919bfd22aef3Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.