CVE-2023-3389

Use after free in io_uring in the Linux Kernel

Published Jun 28, 2023 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.

Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.

We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-3623-1 linux-5.10 security update
Debian DSA Debian DSA DSA-5480-1 linux security update
EUVD EUVD EUVD-2023-44056 A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).
Ubuntu USN Ubuntu USN USN-6246-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6248-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6249-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6250-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6255-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6260-1 Linux kernel vulnerabilities
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00018}

epss

{'score': 0.00021}

Type Values Removed Values Added
Metrics epss

{'score': 0.00019}

epss

{'score': 0.00018}

Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable). A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).
Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Oct 14, 2026, 8:51 PM
Reserved
Jun 23, 2023, 1:43 PM
Status
Modified
Published
Jun 28, 2023, 8:15 PM
Modified
Oct 14, 2026, 9:17 PM
Severity
Moderate
Public date
Jun 16, 2023, 12:00 AM