Skip to content
Noroxi
CVE-2026-80792· NVD / CVE Program· CNA Linux

ipv6: fix use-after-free in ip6_finish_output2()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 087ee0d914aaae929f1660c9ca878e367655ba1a, 3c770ac4e6f07af7c7b40c474a3efc61ffed7862, 3dc98e5fe82d069dd29b124ffbdb679331dfea43; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 087ee0d914aaae929f1660c9ca878e367655ba1a, 3c770ac4e6f07af7c7b40c474a3efc61ffed7862, 3dc98e5fe82d069dd29b124ffbdb679331dfea43; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-80792

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 1598154fd28ffa4a55beae1970475fd6776554b6, 5.15affected
    • 4132c4ad00ddbf3a175ea0d2c775b662a32f4c85 and later · before 75e0a544ebe9af663ef53ca21e9e9185c51fb54aaffected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before c95f01b78266828a57060d754fcbfc92123a98edaffected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before d960881b9312e781a3429aabceb223ce6b7c882faffected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before 087ee0d914aaae929f1660c9ca878e367655ba1aaffected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before 3c770ac4e6f07af7c7b40c474a3efc61ffed7862affected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before 3dc98e5fe82d069dd29b124ffbdb679331dfea43affected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before 99219c82804f266189388e8bf1cf5135d10d5515affected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before 73a187384a8c8b983c7fea046d716b6752a1e7a3affected · git
    • e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 and later · before d0d48d999b0eee6bb176ef4e39d9be868fa80f7eaffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.107-16.12.107-1
Debian:14linuxbefore 7.1.12-17.1.12-1
Red Hat:enterprise_linux_eus:10.0kernelbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64kbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-corebefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debugbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-corebefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-debuginfobefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-develbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-devel-matchedbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-modulesbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-modules-corebefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-modules-extrabefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debuginfobefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-develbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-devel-matchedbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-modulesbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-modules-corebefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-modules-extrabefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-abi-stablelistsbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-corebefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-debugbefore 0:6.12.0-55.111.1.el10_00:6.12.0-55.111.1.el10_0

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-80790Sep 4, 2026 · nvmet-fc: fix invalid free in LS IOD error path
    0Monitor
  • ← EarlierCVE-2026-80791Sep 4, 2026 · nvmet-auth: zero the AUTH_RECEIVE response buffer
    0Monitor
  • Later →CVE-2026-80793Sep 4, 2026 · ipv4: reject undersized MTUs in ip_do_fragment()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux087ee0d914aaae929f1660c9ca878e367655ba1aVendor (CNA)
Linux Linux3c770ac4e6f07af7c7b40c474a3efc61ffed7862Vendor (CNA)
Linux Linux3dc98e5fe82d069dd29b124ffbdb679331dfea43Vendor (CNA)
Linux Linux5.10.267Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux73a187384a8c8b983c7fea046d716b6752a1e7a3Vendor (CNA)
Linux Linux75e0a544ebe9af663ef53ca21e9e9185c51fb54aVendor (CNA)
Linux Linux99219c82804f266189388e8bf1cf5135d10d5515Vendor (CNA)
Linux Linuxc95f01b78266828a57060d754fcbfc92123a98edVendor (CNA)
Linux Linuxd0d48d999b0eee6bb176ef4e39d9be868fa80f7eVendor (CNA)
Linux Linuxd960881b9312e781a3429aabceb223ce6b7c882fVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.3.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-427.154.1.el9_4 · Red Hat:rhel_e4s:9.4::appstreamPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records