7.8

CVE-2026-98241: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-98241DEBIAN-CVE-2026-98241
Published 06-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-98241 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 2.9% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:12131-1

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

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().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

06-10-202621-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.113-1 | < 7.2.8-1
Linux1 product
  • linux≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < b1a88633c36d2cbc3831382f3846754d344276fd | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < 904a0e827d0d7189271a3a2eb648293809f25efc | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < 675919e08ce266b8cac11fd9af29170e762a480f | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < 60459c670329d586a58db5d8f811fa5accfe4862 | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < ca3d68c3213475b53db6647e159dc73bd1af5ab1 | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < 4c030a0400ebfd2318361c923a88103b2c67c49f | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8 | ≥ dd767856a36e00b631d65ebc4bb81b19915532d6, < 6973a21ee73c5567f883813c8ef414774b45892f | 3.2

3 vendors · 171 products

References

12 links
Show all 12 references