Description
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.

Published: 2023-05-01
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2023-33745 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.
Ubuntu USN Ubuntu USN USN-6175-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6186-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6300-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6311-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6332-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-6347-1 Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6385-1 Linux kernel (OEM) vulnerabilities
History

Wed, 05 Mar 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 22 Nov 2024 12:00:00 +0000

Type Values Removed Values Added
References

Subscriptions

Linux Linux Kernel
Redhat Enterprise Linux Rhel Eus Rhev Hypervisor
cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published:

Updated: 2025-03-05T19:03:27.818Z

Reserved: 2023-04-21T17:43:15.944Z

Link: CVE-2023-2235

cve-icon Vulnrichment

Updated: 2024-08-02T06:19:13.580Z

cve-icon NVD

Status : Modified

Published: 2023-05-01T13:15:44.713

Modified: 2024-11-21T07:58:12.630

Link: CVE-2023-2235

cve-icon Redhat

Severity : Important

Publid Date: 2023-03-15T00:00:00Z

Links: CVE-2023-2235 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses