CVE-2026-53075

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — Patch released this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 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(3)

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-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-18ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-18ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-18ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-09-18ubuntu
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-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-18ubuntu
redhatkernel-0:4.18.0-553.164.1.el8_102026-09-17redhat
redhatkernel-rt-0:4.18.0-553.164.1.rt7.505.el8_102026-09-17redhat
redhatkernel-0:6.12.0-211.52.1.el10_22026-09-08redhat

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 (140 versions)7.0.10-1—

Additional Vendor Advisories

(23)

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 15× in last 7d / 62× 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 291 total refreshes for this CVE.

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

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 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-2026-53075 actively exploited?
CVE-2026-53075 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 83.2% of all scored CVEs.
What is the CVSS score of CVE-2026-53075?
CVE-2026-53075 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
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

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