CVE-2026-53211

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 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_meta_bridge: fix stale stack leak via IIFHWADDR register

NFT_META_BRI_IIFHWADDR declares its destination register with len = ETH_ALEN (6 bytes), which the register-init tracking rounds up to two 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does memcpy(dest, br_dev->dev_addr, ETH_ALEN), writing only 6 bytes and leaving the upper 2 bytes of the second register as uninitialised nft_do_chain() stack. A downstream load of that register span leaks those stale bytes to userspace.

Zero the second register before the memcpy so the full declared span is written.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 2, 2026

Advisory Details (3)

Auto-updated Jul 3, 2026
No patch confirmed yet.
generic

netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f1e81d571e375d10e50e852223593493d98c1bac
generic

netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c7d573551f9286100a055ef696cde6af54549677
generic

netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/07acb9798477535933bd658ac9fa85b6cb10d995

Vendor Advisories for CVE-2026-53211(1)

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

Affected Packages

(1 across 1 ecosystem)
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.

Data Freshness Timeline

(refreshed 5× in last 7d / 51× 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 157 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-04 05:06 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-30 19:38 UTCEG score recompute
  11. 2026-08-30 19:38 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-28 21:41 UTCEPSS rescore
  15. 2026-08-27 23:59 UTCEG score recompute
  16. 2026-08-27 23:59 UTCGHSA enrichment
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 13:14 UTCEG score recompute
  21. 2026-08-24 13:14 UTCGHSA enrichment
  22. 2026-08-23 11:04 UTCEG score recompute
  23. 2026-08-23 11:04 UTCGHSA enrichment
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 10:43 UTCEG score recompute
Show 75 more
  1. 2026-08-22 10:43 UTCGHSA enrichment
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-21 07:31 UTCEG score recompute
  4. 2026-08-21 07:31 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 07:09 UTCEG score recompute
  7. 2026-08-20 07:09 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 01:32 UTCEG score recompute
  10. 2026-08-19 01:32 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 12:40 UTCEG score recompute
  14. 2026-08-17 12:40 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 12:19 UTCEG score recompute
  17. 2026-08-16 12:19 UTCGHSA enrichment
  18. 2026-08-16 02:14 UTCEPSS rescore
  19. 2026-08-15 11:58 UTCEG score recompute
  20. 2026-08-15 11:58 UTCGHSA enrichment
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-14 11:36 UTCEG score recompute
  23. 2026-08-14 11:36 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-13 11:15 UTCEG score recompute
  26. 2026-08-13 11:15 UTCGHSA enrichment
  27. 2026-08-12 13:51 UTCEPSS rescore
  28. 2026-08-12 10:54 UTCEG score recompute
  29. 2026-08-12 10:54 UTCGHSA enrichment
  30. 2026-08-11 10:33 UTCEG score recompute
  31. 2026-08-11 10:33 UTCGHSA enrichment
  32. 2026-08-11 00:00 UTCEPSS rescore
  33. 2026-08-10 10:12 UTCGHSA enrichment
  34. 2026-08-09 09:50 UTCEG score recompute
  35. 2026-08-09 09:50 UTCGHSA enrichment
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-08 09:29 UTCEG score recompute
  38. 2026-08-08 09:29 UTCGHSA enrichment
  39. 2026-08-07 09:09 UTCEG score recompute
  40. 2026-08-07 09:08 UTCGHSA enrichment
  41. 2026-08-06 13:47 UTCEPSS rescore
  42. 2026-08-06 08:47 UTCEG score recompute
  43. 2026-08-06 08:47 UTCGHSA enrichment
  44. 2026-08-05 19:17 UTCEPSS rescore
  45. 2026-08-05 08:26 UTCEG score recompute
  46. 2026-08-05 08:26 UTCGHSA enrichment
  47. 2026-08-04 15:10 UTCEPSS rescore
  48. 2026-08-04 10:39 UTCEPSS rescore
  49. 2026-08-04 04:54 UTCEG score recompute
  50. 2026-08-04 04:54 UTCGHSA enrichment
  51. 2026-08-03 10:36 UTCEPSS rescore
  52. 2026-08-03 04:33 UTCGHSA enrichment
  53. 2026-08-02 04:12 UTCEG score recompute
  54. 2026-08-02 04:12 UTCGHSA enrichment
  55. 2026-08-02 02:27 UTCEPSS rescore
  56. 2026-08-01 04:16 UTCEPSS rescore
  57. 2026-08-01 03:50 UTCGHSA enrichment
  58. 2026-07-31 03:20 UTCEG score recompute
  59. 2026-07-31 03:20 UTCGHSA enrichment
  60. 2026-07-30 16:28 UTCEPSS rescore
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-30 01:15 UTCGHSA enrichment
  63. 2026-07-28 21:26 UTCEG score recompute
  64. 2026-07-28 21:26 UTCGHSA enrichment
  65. 2026-07-28 15:37 UTCEPSS rescore
  66. 2026-07-27 17:27 UTCEG score recompute
  67. 2026-07-27 17:27 UTCGHSA enrichment
  68. 2026-07-26 15:12 UTCEG score recompute
  69. 2026-07-26 15:12 UTCGHSA enrichment
  70. 2026-07-26 14:54 UTCEPSS rescore
  71. 2026-07-25 14:18 UTCEPSS rescore
  72. 2026-07-24 14:18 UTCEPSS rescore
  73. 2026-07-23 14:18 UTCEPSS rescore
  74. 2026-07-23 03:19 UTCEG score recompute
  75. 2026-07-22 14:08 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-53211?
CVE-2026-53211 is a medium vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nftmetabridge: fix stale stack leak via IIFHWADDR register NFTMETABRI_IIFHWADDR declares its destination register with len = ETH_ALEN (6 bytes), which the register-init tracking rounds up to two 32-bit registers (8…
When was CVE-2026-53211 disclosed?
CVE-2026-53211 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-2026-53211 actively exploited?
CVE-2026-53211 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 94.5% of all scored CVEs.
What is the CVSS score of CVE-2026-53211?
CVE-2026-53211 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53211?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53211, 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

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