CVE-2026-46244

CRITICAL EPSS 31.0%
Published Jun 3, 20263w ago · Modified Jun 17, 20261w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Jun 3, 2026 3w ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_inner: Fix IPv6 inner_thoff desync In nft_inner_parse_l2l3(), when processing inner IPv6 packets, ipv6_find_hdr() correctly computes the transport header offset traversing all extension headers, but the result is immediately overwritten with nhoff + sizeof(_ip6h) (40 bytes), which only accounts for the IPv6 base header. This creates a desync between inner_thoff (wrong — points to extension header start) and l4proto (correct — e.g., IPPROTO_TCP), enabling transport header forgery and potential firewall bypass. This issue affects stable versions from Linux 6.2. For comparison, the normal (non-inner) IPv6 path correctly preserves ipv6_find_hdr()'s result. Removing the incorrect overwrite ensures that ipv6_find_hdr()'s calculated transport header offset is preserved, thereby fixing the desynchronization.

CVSS Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
31.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥6.2  –  <6.6.142
linuxlinux_kernel*≥6.7  –  <6.12.92
linuxlinux_kernel*≥6.13  –  <6.18.34
linuxlinux_kernel*≥6.19  –  <7.0.11
linuxlinux_kernel7.1any
linuxlinux_kernel7.1any
linuxlinux_kernel7.1any
linuxlinux_kernel7.1any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/689bbf48c1f45130086ae1c46ab83ea4c753c601
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/689bbf48c1f45130086ae1c46ab83ea4c753c601
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce
    Patch