CVE-2026-53026

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: 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:

NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg

In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed.

When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown.

This problem can be reproduced by running the Git project's test suite over NFS.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
34.7%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 28, 2026

Advisory Details (3)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b81572b073441dfd32213e41857676d0dbff4665
generic

NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b48f44f36e6607b2f818560f19deb86b4a9c717b
generic

NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4584229395d0d65bd517780afe97ffea07cb2c3d

Vendor Advisories for CVE-2026-53026(1)

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

Data Freshness Timeline

(refreshed 39× 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.

  1. 2026-07-06 23:39 UTCEG score recompute
  2. 2026-07-06 23:39 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 12:17 UTCEG score recompute
  6. 2026-07-06 12:17 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 00:54 UTCEG score recompute
  10. 2026-07-06 00:54 UTCGHSA enrichment
  11. 2026-07-05 13:31 UTCEG score recompute
  12. 2026-07-05 13:31 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-05 02:08 UTCEG score recompute
  16. 2026-07-05 02:08 UTCGHSA enrichment
  17. 2026-07-04 14:46 UTCEG score recompute
  18. 2026-07-04 14:46 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 03:23 UTCEG score recompute
  21. 2026-07-04 03:23 UTCGHSA enrichment
  22. 2026-07-03 15:58 UTCEG score recompute
  23. 2026-07-03 15:58 UTCGHSA enrichment
  24. 2026-07-03 04:34 UTCEG score recompute
  25. 2026-07-03 04:34 UTCGHSA enrichment
Show 26 more
  1. 2026-07-02 17:11 UTCEG score recompute
  2. 2026-07-02 17:11 UTCGHSA enrichment
  3. 2026-07-02 05:46 UTCEG score recompute
  4. 2026-07-02 05:46 UTCGHSA enrichment
  5. 2026-07-01 18:24 UTCEG score recompute
  6. 2026-07-01 18:24 UTCGHSA enrichment
  7. 2026-07-01 15:07 UTCEPSS rescore
  8. 2026-07-01 07:03 UTCEG score recompute
  9. 2026-07-01 07:03 UTCGHSA enrichment
  10. 2026-06-30 23:22 UTCEPSS rescore
  11. 2026-06-30 19:40 UTCEG score recompute
  12. 2026-06-30 19:40 UTCGHSA enrichment
  13. 2026-06-30 08:17 UTCEG score recompute▲ 7.50
  14. 2026-06-30 08:17 UTCGHSA enrichment
  15. 2026-06-29 14:06 UTCEPSS rescore
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-27 13:19 UTCEG score recompute
  22. 2026-06-27 13:19 UTCGHSA enrichment
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 18:20 UTCEG score recompute
  26. 2026-06-24 18:02 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-53026?
CVE-2026-53026 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: NFSD: fix nfs4file access extra count in nfsd4addrdaccessto_wrdeleg In nfsd4addrdaccesstowrdeleg, if fp->fifds[ORDONLY] is already set by another thread, nfs4fileget_access should not be called to increment the nfs4_file access…
When was CVE-2026-53026 disclosed?
CVE-2026-53026 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53026 actively exploited?
CVE-2026-53026 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53026?
CVE-2026-53026 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-53026?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53026, 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-2026-53026

Explore →

Is Your Infrastructure Affected by CVE-2026-53026?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs