CVE-2026-53212

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nft_tunnel: fix use-after-free on object destroy

nft_tunnel_obj_destroy() calls metadata_dst_free() which directly kfree()s the metadata_dst, ignoring the dst_entry refcount. Packets that took a reference via dst_hold() in nft_tunnel_obj_eval() and are still queued (e.g. in a netem qdisc) are left with a dangling pointer. When these packets are eventually dequeued, dst_release() operates on freed memory.

Replace metadata_dst_free() with dst_release() so the metadata_dst is freed only after all references are dropped. The dst subsystem already handles metadata_dst cleanup in dst_destroy() when DST_METADATA is set.

CVSS v3
7.8
EG Score
7.8(high)
EPSS
2.6%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 2, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef
generic

netfilter: nft_tunnel: fix use-after-free on object destroy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05

Vendor Advisories for CVE-2026-53212(2)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 48× in last 7d / 68× 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. 2026-07-06 22:19 UTCEG score recompute
  2. 2026-07-06 22:19 UTCVendor advisory
  3. 2026-07-06 22:19 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 10:25 UTCEG score recompute
  7. 2026-07-06 10:25 UTCVendor advisory
  8. 2026-07-06 10:25 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 22:31 UTCEG score recompute
  12. 2026-07-05 22:31 UTCVendor advisory
  13. 2026-07-05 22:31 UTCGHSA enrichment
  14. 2026-07-05 10:37 UTCEG score recompute
  15. 2026-07-05 10:37 UTCVendor advisory
  16. 2026-07-05 10:37 UTCGHSA enrichment
  17. 2026-07-04 22:41 UTCEG score recompute
  18. 2026-07-04 22:41 UTCVendor advisory
  19. 2026-07-04 22:41 UTCGHSA enrichment
  20. 2026-07-04 10:46 UTCEG score recompute
  21. 2026-07-04 10:46 UTCVendor advisory
  22. 2026-07-04 10:46 UTCGHSA enrichment
  23. 2026-07-03 22:44 UTCEG score recompute
  24. 2026-07-03 22:44 UTCVendor advisory
  25. 2026-07-03 22:44 UTCGHSA enrichment
Show 43 more
  1. 2026-07-03 10:50 UTCEG score recompute
  2. 2026-07-03 10:50 UTCVendor advisory
  3. 2026-07-03 10:50 UTCGHSA enrichment
  4. 2026-07-02 22:54 UTCEG score recompute
  5. 2026-07-02 22:54 UTCVendor advisory
  6. 2026-07-02 22:54 UTCGHSA enrichment
  7. 2026-07-02 11:00 UTCEG score recompute
  8. 2026-07-02 11:00 UTCVendor advisory
  9. 2026-07-02 11:00 UTCGHSA enrichment
  10. 2026-07-01 23:01 UTCEG score recompute
  11. 2026-07-01 23:01 UTCVendor advisory
  12. 2026-07-01 23:01 UTCGHSA enrichment
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-07-01 11:07 UTCEG score recompute
  15. 2026-07-01 11:07 UTCVendor advisory
  16. 2026-07-01 11:07 UTCGHSA enrichment
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 23:13 UTCEG score recompute
  19. 2026-06-30 23:13 UTCVendor advisory
  20. 2026-06-30 23:13 UTCGHSA enrichment
  21. 2026-06-30 11:19 UTCEG score recompute
  22. 2026-06-30 11:19 UTCVendor advisory
  23. 2026-06-30 11:19 UTCGHSA enrichment
  24. 2026-06-29 23:16 UTCEG score recompute
  25. 2026-06-29 23:16 UTCVendor advisory
  26. 2026-06-29 23:16 UTCGHSA enrichment
  27. 2026-06-29 14:06 UTCEPSS rescore
  28. 2026-06-29 14:06 UTCEPSS rescore
  29. 2026-06-29 11:23 UTCEG score recompute
  30. 2026-06-29 11:23 UTCVendor advisory
  31. 2026-06-29 11:23 UTCGHSA enrichment
  32. 2026-06-28 23:29 UTCEG score recompute
  33. 2026-06-28 23:29 UTCGHSA enrichment
  34. 2026-06-28 14:07 UTCEPSS rescore
  35. 2026-06-28 11:34 UTCEG score recompute▲ 7.80
  36. 2026-06-28 11:34 UTCGHSA enrichment
  37. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  38. 2026-06-28 04:56 UTCEPSS rescore
  39. 2026-06-28 04:56 UTCEPSS rescore
  40. 2026-06-27 03:08 UTCEPSS rescore
  41. 2026-06-25 13:49 UTCEPSS rescore
  42. 2026-06-25 10:07 UTCEG score recompute
  43. 2026-06-25 10:07 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-53212?
CVE-2026-53212 is a high vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix use-after-free on object destroy nfttunnelobjdestroy() calls metadatadst_free() which directly kfree()s the metadatadst, ignoring the dstentry refcount. Packets that took a reference via dsthold() in…
When was CVE-2026-53212 disclosed?
CVE-2026-53212 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53212 actively exploited?
CVE-2026-53212 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53212?
CVE-2026-53212 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-53212?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53212, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-53212

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