synced 8 MIN AGO
01 Record

CVE-2023-1252

A use-after-free flaw was found in the Linux kernel’s Ext4 File System in how a user triggers several file operations simultaneously with the overlay FS usage. This flaw allows a local user to crash

HighPUBLISHEDCNA: redhat
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

A use-after-free flaw was found in the Linux kernel’s Ext4 File System in how a user triggers several file operations simultaneously with the overlay FS usage. This flaw allows a local user to crash

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.22% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 12.8% of scored records. A rank, not a probability.
NVD base score
7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-03-23 00:00Z3 YR AGO
Last updated
2025-04-23 16:23Z1 YR AGO
Reserved
2023-03-07
Assigning CNA
redhat
Record state
PUBLISHED
Severity
High (CVSS 7.8)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
Data version
5.1
Document digest
8835bd499307f55f97e5574d1fd42ae92f9b2b8b2be979c54a04e8a676b7d718

05 Affected products

VendorProductVersionsPlatforms
n/aKernelLinux kernel 5.16-rc1—

06 References

07 Fixed in

AlmaLinux 8

  • bpftool
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-abi-stablelists
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-cross-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-doc
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • perf
    Fixed in 4.18.0-513.5.1.el8_9
  • python3-perf
    Fixed in 4.18.0-513.5.1.el8_9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • bpftool
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-abi-stablelists
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-cross-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-doc
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • perf
    Fixed in 4.18.0-513.5.1.el8_9
  • python3-perf
    Fixed in 4.18.0-513.5.1.el8_9

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • linux
    Fixed in 5.15.3-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • linux
    Fixed in 5.15.3-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • linux
    Fixed in 5.15.3-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • linux-hwe-edge
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • linux-aws-5.0
    No fix yet
  • linux-aws-5.3
    No fix yet
  • linux-azure
    No fix yet
  • linux-azure-5.3
    No fix yet
  • linux-azure-edge
    No fix yet
  • linux-gcp
    No fix yet
  • linux-gcp-5.3
    No fix yet
  • linux-gke-4.15
    No fix yet
  • linux-gke-5.4
    No fix yet
  • linux-gkeop-5.4
    No fix yet
  • linux-hwe
    No fix yet
  • linux-hwe-edge
    No fix yet
  • linux-oem
    No fix yet
  • linux-oracle-5.0
    No fix yet
  • linux-oracle-5.3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • linux-aws-5.11
    No fix yet
  • linux-aws-5.13
    No fix yet
  • linux-aws-5.8
    No fix yet
  • linux-azure-5.11
    No fix yet
  • linux-azure-5.13
    No fix yet
  • linux-azure-5.8
    No fix yet
  • linux-gcp-5.11
    No fix yet
  • linux-gcp-5.13
    No fix yet
  • linux-gcp-5.8
    No fix yet
  • linux-hwe-5.11
    No fix yet
  • linux-hwe-5.13
    No fix yet
  • linux-hwe-5.8
    No fix yet
  • linux-intel-5.13
    No fix yet
  • linux-oem-5.10
    No fix yet
  • linux-oem-5.13
    No fix yet
  • linux-oem-5.14
    Fixed in 5.14.0-1013.13
  • linux-oem-5.6
    No fix yet
  • linux-oracle-5.11
    No fix yet
  • linux-oracle-5.13
    No fix yet
  • linux-oracle-5.8
    No fix yet
  • linux-raspi2
    No fix yet
  • linux-riscv
    No fix yet
  • linux-riscv-5.11
    No fix yet
  • linux-riscv-5.8
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • linux-riscv
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.