Answer in brief
CVE-2026-98241 records a Unknown severity vulnerability in ipv6: xfrm: use full sockets in local error paths. 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.
A CVSS score is not reported in the current record. 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 | >=dd767856a36e00b631d65ebc4bb81b19915532d6 <b1a88633c36d2cbc3831382f3846754d344276fd || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <904a0e827d0d7189271a3a2eb648293809f25efc || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <675919e08ce266b8cac11fd9af29170e762a480f || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <60459c670329d586a58db5d8f811fa5accfe4862 || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <ca3d68c3213475b53db6647e159dc73bd1af5ab1 || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <4c030a0400ebfd2318361c923a88103b2c67c49f || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8 || >=dd767856a36e00b631d65ebc4bb81b19915532d6 <6973a21ee73c5567f883813c8ef414774b45892f | b1a88633c36d2cbc3831382f3846754d344276fd, 904a0e827d0d7189271a3a2eb648293809f25efc, 675919e08ce266b8cac11fd9af29170e762a480f, 60459c670329d586a58db5d8f811fa5accfe4862, ca3d68c3213475b53db6647e159dc73bd1af5ab1, 4c030a0400ebfd2318361c923a88103b2c67c49f, c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8, 6973a21ee73c5567f883813c8ef414774b45892f |
| Linux/Linuxgeneric | 3.2 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
In the Linux kernel, the following vulnerability has been resolved: ipv6: xfrm: use full sockets in local error paths xfrm6_local_rxpmtu() and xfrm6_local_error() dereference skb->sk as if it always pointed at a full IPv6 socket. That is not guaranteed. TCP SYN-ACK skbs can be owned by a TCP_NEW_SYN_RECV request_sock while the output path itself is driven by the full listener. If rerouting selects an IPv6 XFRM tunnel route with a lower MTU, the local PMTU/error handling path can reach these callbacks with that mini-socket still attached to the skb. The callbacks then miscast the request socket as a full inet/IPv6 socket and can read beyond the request_sock allocation when they access inet_sock or ipv6_pinfo state. Resolve the owner with skb_to_full_sk() in both callbacks and bail out when no full socket is attached. This matches the surrounding XFRM IPv6 PMTU/error logic, which already reasons about full sockets with skb_to_full_sk().
Quoted source text, attributed separately from HOL analysis.