Answer in brief
CVE-2026-46244 records a Critical severity (CVSS 9.1) vulnerability in netfilter: nft_inner: Fix IPv6 inner_thoff desync. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-46244 records a Critical severity (CVSS 9.1) vulnerability in netfilter: nft_inner: Fix IPv6 inner_thoff desync. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3a07327d10a09379315c844c63f27941f5081e0a <c161ad9157f5a0429b5ff94d9770faf3bf48d273 || >=3a07327d10a09379315c844c63f27941f5081e0a <870d59e2cf218e7418491e26bad768cb16654582 || >=3a07327d10a09379315c844c63f27941f5081e0a <689bbf48c1f45130086ae1c46ab83ea4c753c601 || >=3a07327d10a09379315c844c63f27941f5081e0a <d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce || >=3a07327d10a09379315c844c63f27941f5081e0a <b6a91f68ebfed9c38e0e9150f58a9b85da07181c | c161ad9157f5a0429b5ff94d9770faf3bf48d273, 870d59e2cf218e7418491e26bad768cb16654582, 689bbf48c1f45130086ae1c46ab83ea4c753c601, d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce, b6a91f68ebfed9c38e0e9150f58a9b85da07181c |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jun 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 2, 2026
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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3a07327d10a09379315c844c63f27941f5081e0a <c161ad9157f5a0429b5ff94d9770faf3bf48d273 || >=3a07327d10a09379315c844c63f27941f5081e0a <870d59e2cf218e7418491e26bad768cb16654582 || >=3a07327d10a09379315c844c63f27941f5081e0a <689bbf48c1f45130086ae1c46ab83ea4c753c601 || >=3a07327d10a09379315c844c63f27941f5081e0a <d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce || >=3a07327d10a09379315c844c63f27941f5081e0a <b6a91f68ebfed9c38e0e9150f58a9b85da07181c | c161ad9157f5a0429b5ff94d9770faf3bf48d273, 870d59e2cf218e7418491e26bad768cb16654582, 689bbf48c1f45130086ae1c46ab83ea4c753c601, d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce, b6a91f68ebfed9c38e0e9150f58a9b85da07181c |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jun 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 2, 2026
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.
Quoted source text, attributed separately from HOL analysis.