CVE-2026-80792

UNRATEDCVSS · not yet scoredTrending — Patch released this week
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

September 4, 2026

Last Modified

September 4, 2026

References (9)

Vendor Advisories for CVE-2026-80792(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-427.154.1.el9_42026-10-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1
  • every version up to 6.12.107-1~deb12u1: fixed in 6.12.107-1~deb12u1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (34 versions)
  • every version up to 6.12.107-1: fixed in 6.12.107-1
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (170 versions)
  • every version up to 7.1.12-1: fixed in 7.1.12-1
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Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-08 03:47 UTCVendor advisory
  4. 2026-10-08 03:47 UTCGHSA enrichment
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-06 15:18 UTCEPSS rescore
  7. 2026-10-05 17:43 UTCEPSS rescore
  8. 2026-10-05 03:42 UTCVendor advisory
  9. 2026-10-05 03:42 UTCGHSA enrichment
  10. 2026-10-04 23:22 UTCEPSS rescore
  11. 2026-10-03 14:26 UTCEPSS rescore
  12. 2026-10-02 17:57 UTCEPSS rescore
  13. 2026-10-02 03:38 UTCVendor advisory
  14. 2026-10-02 03:38 UTCGHSA enrichment
  15. 2026-10-01 19:50 UTCEPSS rescore
  16. 2026-09-30 15:04 UTCEPSS rescore
  17. 2026-09-29 02:31 UTCEG score recompute
  18. 2026-09-29 02:31 UTCVendor advisory
  19. 2026-09-29 02:31 UTCGHSA enrichment
  20. 2026-09-28 13:52 UTCEPSS rescore
  21. 2026-09-27 13:48 UTCEPSS rescore
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-26 02:26 UTCVendor advisory
  24. 2026-09-26 02:26 UTCGHSA enrichment
  25. 2026-09-26 00:28 UTCEPSS rescore
Show 30 more
  1. 2026-09-24 14:04 UTCEPSS rescore
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-22 18:38 UTCVendor advisory
  4. 2026-09-22 18:38 UTCGHSA enrichment
  5. 2026-09-22 16:01 UTCEPSS rescore
  6. 2026-09-21 21:09 UTCEPSS rescore
  7. 2026-09-20 20:16 UTCEPSS rescore
  8. 2026-09-19 18:33 UTCVendor advisory
  9. 2026-09-19 18:33 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-16 18:28 UTCVendor advisory
  12. 2026-09-16 18:28 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-13 16:41 UTCVendor advisory
  18. 2026-09-13 16:41 UTCGHSA enrichment
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-10 16:36 UTCGHSA enrichment
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-07 16:31 UTCEG score recompute
  24. 2026-09-07 16:31 UTCVendor advisory
  25. 2026-09-07 16:31 UTCGHSA enrichment
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-05 15:31 UTCEPSS rescore
  28. 2026-09-04 16:22 UTCNVD update
  29. 2026-09-04 15:29 UTCEG score recompute
  30. 2026-09-04 15:29 UTCMITRE cvelistV5first tracked

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redhat:RHSA-2026:77218

Frequently asked(4)

What is CVE-2026-80792?
CVE-2026-80792 is a publicly disclosed vulnerability published on September 4, 2026. In the Linux kernel, the following vulnerability has been resolved: ipv6: fix use-after-free in ip6finishoutput2() ip6finishoutput2() caches a pointer to the IPv6 destination address (daddr) before invoking lwtunnel_xmit(). The LWT-BPF transmit path or other encapsulation operations within…
When was CVE-2026-80792 disclosed?
CVE-2026-80792 was first published on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80792 actively exploited?
CVE-2026-80792 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-80792?
A fix for CVE-2026-80792 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-80792 are linked in the Vendor Advisories panel on this page.

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