CVE-2026-53075

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: 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:

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls

/dev/ppp open is currently authorized against file->f_cred->user_ns, while unattached administrative ioctls operate on current->nsproxy->net_ns.

As a result, a local unprivileged user can create a new user namespace with CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace, and still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against an inherited network namespace.

Require CAP_NET_ADMIN in the user namespace that owns the target network namespace before handling unattached PPP administrative ioctls.

This preserves normal pppd operation in the network namespace it is actually privileged in, while rejecting the userns-only inherited-netns case.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
7.9%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 28, 2026

Advisory Details (8)

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

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c9edd90c57ae23692fff6b049fdfa4572a9fd532
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/954745d0223e7caec917c0b2d1a889ff56fa6e54
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67e901e28d177ac9a9bed76d69ce3471e704a89e
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5080e188c914110034bbc569d5cfa2f06204681d
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5013be175c7ffd8b39efbc3c9c4db5b10b85fea8
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3b2c2157dc2afc5c17cd7238afefca92f1ef330e
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2bb6379416fd19f44c3423a00bfd8626259f6067
generic

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1a8a51ce85075a56a743b6f142606dd2696a391c

Vendor Advisories for CVE-2026-53075(2)

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 33× in last 7d / 45× 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 19:50 UTCEG score recompute
  2. 2026-07-06 19:50 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 07:15 UTCEG score recompute
  6. 2026-07-06 07:15 UTCGHSA enrichment
  7. 2026-07-05 18:55 UTCEG score recompute
  8. 2026-07-05 18:55 UTCGHSA enrichment
  9. 2026-07-05 06:45 UTCEG score recompute
  10. 2026-07-05 06:45 UTCGHSA enrichment
  11. 2026-07-05 02:31 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 18:33 UTCEG score recompute
  14. 2026-07-04 18:33 UTCGHSA enrichment
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-04 06:21 UTCEG score recompute
  17. 2026-07-04 06:21 UTCGHSA enrichment
  18. 2026-07-03 18:08 UTCEG score recompute
  19. 2026-07-03 18:08 UTCGHSA enrichment
  20. 2026-07-03 05:53 UTCEG score recompute
  21. 2026-07-03 05:53 UTCGHSA enrichment
  22. 2026-07-02 17:40 UTCEG score recompute
  23. 2026-07-02 17:40 UTCGHSA enrichment
  24. 2026-07-02 05:25 UTCEG score recompute
  25. 2026-07-02 05:24 UTCGHSA enrichment
Show 20 more
  1. 2026-07-01 17:14 UTCEG score recompute
  2. 2026-07-01 17:14 UTCGHSA enrichment
  3. 2026-07-01 15:07 UTCEPSS rescore
  4. 2026-07-01 05:04 UTCEG score recompute
  5. 2026-07-01 05:03 UTCGHSA enrichment
  6. 2026-06-30 23:22 UTCEPSS rescore
  7. 2026-06-30 16:52 UTCEG score recompute▲ 8.80
  8. 2026-06-30 16:51 UTCGHSA enrichment
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 17:34 UTCEG score recompute
  16. 2026-06-27 17:33 UTCGHSA enrichment
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-24 18:14 UTCEG score recompute
  20. 2026-06-24 18:03 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-53075?
CVE-2026-53075 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: ppp: require CAPNETADMIN in target netns for unattached ioctls /dev/ppp open is currently authorized against file->fcred->userns, while unattached administrative ioctls operate on current->nsproxy->net_ns. As a result, a local…
When was CVE-2026-53075 disclosed?
CVE-2026-53075 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-2026-53075 actively exploited?
CVE-2026-53075 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53075?
CVE-2026-53075 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-53075?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53075, 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-2026-53075

Explore →

Is Your Infrastructure Affected by CVE-2026-53075?

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

Start Free Scan →Browse All CVEs