CVE-2026-53212

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

June 25, 2026

Last Modified

August 5, 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.

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1076 (5.15.0-1076.80) @ jammy2026-09-18ubuntu
ubuntulinux-virtual-6.17 (6.17.0-42.42) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-29.29) @ resolute2026-09-18ubuntu
ubuntulinux-tools-kvm-5.4 (5.4.0.1149.145) @ focal2026-09-18ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1034.35) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1059.62) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1110.106) @ jammy2026-09-18ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1080 (5.4.0-1080.84) @ focal2026-09-18ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1054.56) @ jammy2026-09-18ubuntu
ubuntulinux-tools-aws-edge (7.0.0-1010.10~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1118.127~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-29.29~24.04.2) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1059.62~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1020.20) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-138.138~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-gke-hwe-26.04 (7.0.0-1005.6) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1062.65~22.04.2) @ jammy2026-09-18ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1114.111) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1031.31) @ noble2026-09-18ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.190.157) @ jammy2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2051.53) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-edge (5.4.0.1167.173~18.04.1) @ bionic2026-09-18ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1110.109) @ jammy2026-09-18ubuntu
ubuntulinux-tools-gcp-fips-5.4 (5.4.0.1165.107) @ focal2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1114.124~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1161.171~18.04.1) @ bionic2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1010.10) @ resolute2026-09-18ubuntu

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

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 7× in last 7d / 54× 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.

Showing the most recent 100 of 312 total refreshes for this CVE.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 07:31 UTCEG score recompute
  4. 2026-09-18 07:31 UTCVendor advisory
  5. 2026-09-18 07:30 UTCGHSA enrichment
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-14 01:24 UTCEG score recompute
  9. 2026-09-14 01:24 UTCVendor advisory
  10. 2026-09-14 01:24 UTCGHSA enrichment
  11. 2026-09-13 16:47 UTCEPSS rescore
  12. 2026-09-13 09:42 UTCVendor advisory
  13. 2026-09-13 09:41 UTCGHSA enrichment
  14. 2026-09-12 15:57 UTCEG score recompute
  15. 2026-09-12 15:57 UTCVendor advisory
  16. 2026-09-12 15:57 UTCGHSA enrichment
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-10 09:35 UTCEPSS rescore
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-06 13:47 UTCEPSS rescore
  22. 2026-09-04 05:06 UTCEPSS rescore
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 04:40 UTCEPSS rescore
Show 75 more
  1. 2026-08-30 19:39 UTCEG score recompute
  2. 2026-08-30 19:39 UTCVendor advisory
  3. 2026-08-30 19:38 UTCGHSA enrichment
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-28 21:41 UTCEPSS rescore
  7. 2026-08-27 23:59 UTCEG score recompute
  8. 2026-08-27 23:59 UTCVendor advisory
  9. 2026-08-27 23:59 UTCGHSA enrichment
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-25 01:08 UTCEG score recompute
  14. 2026-08-25 01:08 UTCVendor advisory
  15. 2026-08-25 01:07 UTCGHSA enrichment
  16. 2026-08-24 13:13 UTCEG score recompute
  17. 2026-08-24 13:13 UTCVendor advisory
  18. 2026-08-24 13:13 UTCGHSA enrichment
  19. 2026-08-23 22:30 UTCVendor advisory
  20. 2026-08-23 22:30 UTCGHSA enrichment
  21. 2026-08-23 10:36 UTCEG score recompute
  22. 2026-08-23 10:36 UTCVendor advisory
  23. 2026-08-23 10:35 UTCGHSA enrichment
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 22:38 UTCVendor advisory
  26. 2026-08-22 22:38 UTCGHSA enrichment
  27. 2026-08-22 10:42 UTCEG score recompute
  28. 2026-08-22 10:42 UTCVendor advisory
  29. 2026-08-22 10:42 UTCGHSA enrichment
  30. 2026-08-21 23:49 UTCEPSS rescore
  31. 2026-08-21 19:09 UTCVendor advisory
  32. 2026-08-21 19:08 UTCGHSA enrichment
  33. 2026-08-21 07:14 UTCEG score recompute
  34. 2026-08-21 07:14 UTCVendor advisory
  35. 2026-08-21 07:14 UTCGHSA enrichment
  36. 2026-08-20 22:55 UTCEPSS rescore
  37. 2026-08-20 19:03 UTCVendor advisory
  38. 2026-08-20 19:03 UTCGHSA enrichment
  39. 2026-08-20 07:09 UTCEG score recompute
  40. 2026-08-20 07:09 UTCVendor advisory
  41. 2026-08-20 07:08 UTCGHSA enrichment
  42. 2026-08-19 17:04 UTCEPSS rescore
  43. 2026-08-19 13:30 UTCVendor advisory
  44. 2026-08-19 13:30 UTCGHSA enrichment
  45. 2026-08-19 01:33 UTCEG score recompute
  46. 2026-08-19 01:33 UTCVendor advisory
  47. 2026-08-19 01:32 UTCGHSA enrichment
  48. 2026-08-18 13:48 UTCEPSS rescore
  49. 2026-08-17 13:47 UTCEPSS rescore
  50. 2026-08-17 11:22 UTCVendor advisory
  51. 2026-08-17 11:22 UTCGHSA enrichment
  52. 2026-08-16 23:28 UTCEG score recompute
  53. 2026-08-16 23:28 UTCVendor advisory
  54. 2026-08-16 23:28 UTCGHSA enrichment
  55. 2026-08-16 14:56 UTCEPSS rescore
  56. 2026-08-16 11:33 UTCEG score recompute
  57. 2026-08-16 11:33 UTCVendor advisory
  58. 2026-08-16 11:33 UTCGHSA enrichment
  59. 2026-08-16 02:14 UTCEPSS rescore
  60. 2026-08-15 23:40 UTCVendor advisory
  61. 2026-08-15 23:40 UTCGHSA enrichment
  62. 2026-08-15 11:46 UTCEG score recompute
  63. 2026-08-15 11:46 UTCVendor advisory
  64. 2026-08-15 11:46 UTCGHSA enrichment
  65. 2026-08-15 01:30 UTCEPSS rescore
  66. 2026-08-14 23:52 UTCVendor advisory
  67. 2026-08-14 23:52 UTCGHSA enrichment
  68. 2026-08-14 11:58 UTCVendor advisory
  69. 2026-08-14 11:58 UTCGHSA enrichment
  70. 2026-08-14 00:04 UTCEG score recompute
  71. 2026-08-14 00:04 UTCVendor advisory
  72. 2026-08-14 00:04 UTCGHSA enrichment
  73. 2026-08-13 22:00 UTCEPSS rescore
  74. 2026-08-13 12:09 UTCVendor advisory
  75. 2026-08-13 12:09 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 August 5, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 95.4% of all scored CVEs.
What is the CVSS score of CVE-2026-53212?
CVE-2026-53212 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53212

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