CVE-2015-8709

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: None knownExposed: 0

A fix is available — apply it.

kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity70% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

February 8, 2016

Last Modified

June 17, 2026

References (50)

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-extra-3.16.0-57-generic (3.16.0-57.77~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-4.2.0-22-powerpc64-smp (4.2.0-22.27) @ wily2026-05-22ubuntu
ubuntulinux-image-extra-3.19.0-42-generic (3.19.0-42.48~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-extra-3.13.0-74-generic (3.13.0-74.118) @ trusty2026-05-22ubuntu
ubuntulinux-image-3.13.0-74-generic-lpae (3.13.0-74.118~precise1) @ precise2026-05-22ubuntu
ubuntulinux-image-4.2.0-1017-raspi2 (4.2.0-1017.24) @ wily2026-05-22ubuntu
ubuntulinux-image-extra-4.2.0-22-generic (4.2.0-22.27~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-3.19.0-42-powerpc64-smp (3.19.0-42.48) @ vivid2026-05-22ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—4.3.3-3—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—4.3.3-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—4.3.3-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—4.3.3-3—

Weakness Classification(1)

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

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 22× 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 147 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2015-8709?
CVE-2015-8709 is a high vulnerability published on February 8, 2016. kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor…
When was CVE-2015-8709 disclosed?
CVE-2015-8709 was first published in the National Vulnerability Database on February 8, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-8709 actively exploited?
CVE-2015-8709 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 66.2% of all scored CVEs.
What is the CVSS score of CVE-2015-8709?
CVE-2015-8709 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2015-8709?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8709, 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.

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