CVE-2026-80792: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80792DEBIAN-CVE-2026-80792
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80792 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 6 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:11773-1RHSA-2026:76739RHSA-2026:77218RHSA-2026:77219RHSA-2026:83707

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: ipv6: fix use-after-free in ip6_finish_output2() ip6_finish_output2() caches a pointer to the IPv6 destination address (daddr) before invoking lwtunnel_xmit(). The LWT-BPF transmit path or other encapsulation operations within lwtunnel_xmit() can reallocate the skb head, freeing the memory that daddr points to. When lwtunnel_xmit() returns LWTUNNEL_XMIT_CONTINUE, the function continues to use the stale daddr pointer to compute the nexthop and to look up or create the neighbour entry. This results in a use-after-free read, which can leak sensitive kernel data, pollute the neighbour table with arbitrary values, misdirect traffic, or crash the system. Fix this by re-fetching the IPv6 header and the destination address pointer after lwtunnel_xmit() returns LWTUNNEL_XMIT_CONTINUE, ensuring that the subsequent nexthop computation and neighbour lookup operate on valid memory.

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

Ubuntu165 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 | < 6.12.107-1 | < 7.1.12-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 4132c4ad00ddbf3a175ea0d2c775b662a32f4c85, < 75e0a544ebe9af663ef53ca21e9e9185c51fb54a | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < c95f01b78266828a57060d754fcbfc92123a98ed | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < d960881b9312e781a3429aabceb223ce6b7c882f | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < 087ee0d914aaae929f1660c9ca878e367655ba1a | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < 3c770ac4e6f07af7c7b40c474a3efc61ffed7862 | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < 3dc98e5fe82d069dd29b124ffbdb679331dfea43 | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < 99219c82804f266189388e8bf1cf5135d10d5515 | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < 73a187384a8c8b983c7fea046d716b6752a1e7a3 | ≥ e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2, < d0d48d999b0eee6bb176ef4e39d9be868fa80f7e | 1598154fd28ffa4a55beae1970475fd6776554b6 | ≥ 5.10.233, < 5.10.267 | ≥ 5.4.289, < 5.5 | 5.15

3 vendors · 168 products

References

14 links
Show all 14 references