CVE-2026-80846: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80846DEBIAN-CVE-2026-80846
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80846 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.7% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 10
MGASA-2026-0506OPENSUSE-SU-2026:11773-1OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1

Timeline

  1. 04-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: drop ESP-in-TCP packets with no ingress device ESP-in-TCP receives records through the TCP strparser. handle_esp() restores skb->dev from the saved skb_iif before passing the packet into the XFRM input path. Queued TCP data can be processed after the original ingress device has been removed, for example during veth or net namespace teardown. In that case dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input paths both expect skb->dev to be valid while building the route lookup, so queued ESP-in-TCP data can dereference a NULL device. Drop the packet if the saved ingress device can no longer be resolved. Such a packet can no longer be routed through the normal XFRM receive path, and this preserves the existing behaviour for packets whose ingress device still exists.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

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

Ubuntu157 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)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.111-1 | < 7.1.13-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 239d0f71af09dc2029fd4d730cb24b8c83aaa43a | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < f00235f9d12301183d61f75fbe4105506f3e5140 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 6af5cdb03819a5ce6e945992635c6c5e91045367 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 2dd1609cadff46c4b20ce53b91ab9cce1380456a | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < c296d25efbc840be24de83f56d43bc47e714ace9 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 328e40aa774b446969c69b654c52a051a95af8a1 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 7911e0236616487b89db6bd3ba3f408abd10eb23 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 943d95233b8b4a88994e244fcf466f8c403d63f1 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < e1d7c5ac1c246ce5775f604515de0a59fbf2116e | 5.6

3 vendors · 160 products

References

13 links
Show all 13 references