CVE-2026-53211

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH 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
Trending — 4 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: 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_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(high)
EPSS
2.6%
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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 31× 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. 2026-07-07 05:35 UTCEG score recompute
  2. 2026-07-07 05:35 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 05:14 UTCEG score recompute
  6. 2026-07-06 05:14 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 04:50 UTCEG score recompute
  10. 2026-07-05 04:50 UTCGHSA enrichment
  11. 2026-07-05 02:31 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-04 04:15 UTCEG score recompute▲ 5.50
  16. 2026-07-04 04:14 UTCGHSA enrichment
  17. 2026-07-02 22:05 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 06:11 UTCGHSA enrichment
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 08:08 UTCEG score recompute
  25. 2026-06-28 08:07 UTCGHSA enrichment
Show 6 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-25 10:07 UTCEG score recompute
  6. 2026-06-25 10:07 UTCGHSA enrichment

Related CVEs(same CWE)

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 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53211?
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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