CVE-2023-2235

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-07-06. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.

The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.

We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
15th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

May 1, 2023

Last Modified

August 7, 2026

Advisory Details (2)

Auto-updated Aug 7, 2026
Patch available.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20230609-0002/
generic

perf: Fix check before add_event_to_groups() in perf_group_detach() - kernel/git/torvalds/linux.git - Linux kernel source tree

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2

Vendor Advisories for CVE-2023-2235(10)

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

Patch Availability(15)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.79.76) @ jammy2026-05-25ubuntu
ubuntulinux-buildinfo-6.2.0-1007-gcp (6.2.0-1007.7) @ lunar2026-05-25ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1045.41) @ jammy2026-05-25ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1043.50~20.04.1.22) @ focal2026-05-25ubuntu
ubuntulinux-tools-gkeop-5.15 (5.15.0.1025.24) @ jammy2026-05-25ubuntu
ubuntulinux-tools-oem-22.04b (6.0.0.1021.21) @ jammy2026-05-25ubuntu
ubuntulinux-cloud-tools-6.2.0-23 (6.2.0-23.23) @ lunar2026-05-25ubuntu
redhatkernel-0:4.18.0-372.75.1.el8_62023-10-10redhat
redhatkernel-0:4.18.0-477.21.1.el8_82023-08-08redhat
redhatkernel-rt-0:4.18.0-477.21.1.rt7.284.el8_82023-08-08redhat
redhatkernel-0:5.14.0-70.64.1.el9_02023-07-18redhat
redhatkernel-rt-0:5.14.0-70.64.1.rt21.135.el9_02023-07-18redhat
redhatkernel-0:5.14.0-284.18.1.el9_22023-06-21redhat
redhatkernel-rt-0:5.14.0-284.18.1.rt14.303.el9_22023-06-21redhat
redhatkpatch-patch2023-06-21redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.1.25-1: fixed in 6.1.25-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.1.25-1: fixed in 6.1.25-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.1.25-1: fixed in 6.1.25-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(7)

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 7× in last 7d / 26× 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 193 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2023-2235?
CVE-2023-2235 is a high vulnerability published on May 1, 2023. A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perfgroupdetach function did not check the event's siblings' attachstate before calling addeventtogroups(), but removeonexec made it possible to call…
When was CVE-2023-2235 disclosed?
CVE-2023-2235 was first published on May 1, 2023, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-2235 actively exploited?
CVE-2023-2235 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-2235?
CVE-2023-2235 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-2235?
A fix for CVE-2023-2235 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-2235 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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