medium 5.5

CVE-2023-52686 json

powerpc/powernv: Add a null pointer check in opal_event_init()

published 2024-05-17 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57310

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

In the Linux kernel, the following vulnerability has been resolved:

kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure.

Patch / fix

fixed in 1 distros 6 links 8

Linux Linux 4.19.306, 5.4.268, 5.10.209, 5.15.148, 6.1.75, 6.6.14, 6.7.2, 6.8

debian ubuntu red hat suse almalinux rocky linux

linux Debian 12 6.1.76-1
linux Debian 14, Debian 13 6.6.15-1

debian advisories DEBIAN-CVE-2023-52686

linux Ubuntu 20.04 LTS 5.4.0-176.196
linux Ubuntu 22.04 LTS 5.15.0-102.112
linux-aws Ubuntu 20.04 LTS 5.4.0-1122.132
linux-aws Ubuntu 22.04 LTS 5.15.0-1057.63
linux-gcp Ubuntu 20.04 LTS 5.4.0-1126.135
linux-gcp Ubuntu 22.04 LTS 5.15.0-1055.63
linux-gke Ubuntu 22.04 LTS 5.15.0-1054.59
linux-ibm Ubuntu 20.04 LTS 5.4.0-1069.74

ubuntu advisories UBUNTU-CVE-2023-52686

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

kernel RHEL 9 5.14.0-503.11.1.el9_5
rv RHEL 9 5.14.0-503.11.1.el9_5
perf RHEL 9 5.14.0-503.11.1.el9_5
rtla RHEL 9 5.14.0-503.11.1.el9_5
bpftool RHEL 9 7.4.0-503.11.1.el9_5
libperf RHEL 9 5.14.0-503.11.1.el9_5
kernel-rt RHEL 9 5.14.0-503.11.1.el9_5
kernel-64k RHEL 9 5.14.0-503.11.1.el9_5

red hat advisories RHSA-2025:15016 RHSA-2024:9315 RHSA-2024:4211

kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-25.1
kernel-livepatch-MICRO-6-0-RT_Update_5 Linux Micro 6.1, Linux Micro 6.0 1-1.1
kernel-rt Linux Micro 6.0 6.4.0-9.1
kernel-source-rt Linux Micro 6.0 6.4.0-9.1
kernel-source Linux Micro 6.0 6.4.0-18.1
kernel-default Linux Micro 6.0 6.4.0-18.1
kernel-kvmsmall Linux Micro 6.0 6.4.0-18.1

suse advisories SUSE-SU-2025:20166-1 SUSE-SU-2025:20249-1 SUSE-SU-2025:20028-1 SUSE-SU-2025:20008-1 SUSE-SU-2024:2973-1 SUSE-SU-2024:2948-1

kernel AlmaLinux 8 4.18.0-553.8.1.el8_10
perf AlmaLinux 8 4.18.0-553.8.1.el8_10
bpftool AlmaLinux 8 4.18.0-553.8.1.el8_10
kernel-core AlmaLinux 8 4.18.0-553.8.1.el8_10
kernel-tools AlmaLinux 8 4.18.0-553.8.1.el8_10
python3-perf AlmaLinux 8 4.18.0-553.8.1.el8_10
kernel-modules AlmaLinux 8 4.18.0-553.8.1.el8_10
kernel-zfcpdump AlmaLinux 8 4.18.0-553.8.1.el8_10

almalinux advisories ALSA-2024:4211

kernel Rocky Linux 8 4.18.0-553.8.1.el8_10

rocky linux advisories RLSA-2024:4211

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-52686 updated 2026-11-07 cvss 5.5

kernel: powerpc/powernv: Add a null pointer check in opal_event_init()

Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux 8 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +6 more
affected: no fix available
Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-s390x 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-x86_64 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-aarch64 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-ppc64le 5.14.0-503.11.1.el9_5
fixed: vendor fix RHSA-2024:9315
Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.85.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.85.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.85.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.85.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.85.1.el9_4
fixed: vendor fix RHSA-2025:15016
Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-503.11.1.el9_5, perf 5.14.0-503.11.1.el9_5, rtla 5.14.0-503.11.1.el9_5, kernel-devel-matched 5.14.0-503.11.1.el9_5, kernel-64k-devel-matched 5.14.0-503.11.1.el9_5, kernel-debug-devel-matched 5.14.0-503.11.1.el9_5, +6 more
fixed: vendor fix RHSA-2024:9315
Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.85.1.el9_4, perf 5.14.0-427.85.1.el9_4, rtla 5.14.0-427.85.1.el9_4, kernel-devel-matched 5.14.0-427.85.1.el9_4, kernel-64k-devel-matched 5.14.0-427.85.1.el9_4, kernel-debug-devel-matched 5.14.0-427.85.1.el9_4, +6 more
fixed: vendor fix RHSA-2025:15016
Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.8.1.el8_10, kernel 4.18.0-553.8.1.el8_10, bpftool 4.18.0-553.8.1.el8_10, kernel-core 4.18.0-553.8.1.el8_10, kernel-tools 4.18.0-553.8.1.el8_10, python3-perf 4.18.0-553.8.1.el8_10, +15 more
fixed: vendor fix RHSA-2024:4211
Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.4.0-503.11.1.el9_5, kernel 5.14.0-503.11.1.el9_5, kernel-64k 5.14.0-503.11.1.el9_5, kernel-core 5.14.0-503.11.1.el9_5, kernel-tools 5.14.0-503.11.1.el9_5, python3-perf 5.14.0-503.11.1.el9_5, +29 more
fixed: vendor fix RHSA-2024:9315

show 7 more

Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.85.1.el9_4, kernel 5.14.0-427.85.1.el9_4, kernel-64k 5.14.0-427.85.1.el9_4, kernel-core 5.14.0-427.85.1.el9_4, kernel-tools 5.14.0-427.85.1.el9_4, python3-perf 5.14.0-427.85.1.el9_4, +28 more
fixed: vendor fix RHSA-2025:15016
Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.8.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.8.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.8.1.el8_10
fixed: vendor fix RHSA-2024:4211
Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-503.11.1.el9_5, kernel-rt-core 5.14.0-503.11.1.el9_5, kernel-rt-modules 5.14.0-503.11.1.el9_5, kernel-rt-debug-core 5.14.0-503.11.1.el9_5, kernel-rt-modules-core 5.14.0-503.11.1.el9_5, kernel-rt-debug-modules 5.14.0-503.11.1.el9_5, +4 more
fixed: vendor fix RHSA-2024:9315
Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.85.1.el9_4, kernel-rt-core 5.14.0-427.85.1.el9_4, kernel-rt-modules 5.14.0-427.85.1.el9_4, kernel-rt-debug-core 5.14.0-427.85.1.el9_4, kernel-rt-modules-core 5.14.0-427.85.1.el9_4, kernel-rt-debug-modules 5.14.0-427.85.1.el9_4, +4 more
fixed: vendor fix RHSA-2025:15016
Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-503.11.1.el9_5, kernel-rt-kvm 5.14.0-503.11.1.el9_5, kernel-rt-core 5.14.0-503.11.1.el9_5, kernel-rt-modules 5.14.0-503.11.1.el9_5, kernel-rt-debug-kvm 5.14.0-503.11.1.el9_5, kernel-rt-debug-core 5.14.0-503.11.1.el9_5, +6 more
fixed: vendor fix RHSA-2024:9315
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.85.1.el9_4, kernel-rt-kvm 5.14.0-427.85.1.el9_4, kernel-rt-core 5.14.0-427.85.1.el9_4, kernel-rt-modules 5.14.0-427.85.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.85.1.el9_4, kernel-rt-debug-core 5.14.0-427.85.1.el9_4, +6 more
fixed: vendor fix RHSA-2025:15016
Red Hat CodeReady Linux Builder (v. 9) kernel-cross-headers 5.14.0-503.11.1.el9_5 Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux AppStream (v. 9) kernel-headers 5.14.0-503.11.1.el9_5 Red Hat Enterprise Linux BaseOS (v. 8) kernel-headers 4.18.0-553.8.1.el8_10, kernel-cross-headers 4.18.0-553.8.1.el8_10
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-10)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux Linux

Classification

Weakness

CWE-476 NULL Pointer Dereference

Technology feeds

Linux kernel rss critical rss

References

git.kernel.org /stable/c/8422d179cf46889c15ceff9ede48c5bfa4e7f0b4
mailing-list, patch
git.kernel.org /stable/c/e93d7cf4c1ddbcd846739e7ad849f955a4f18031
mailing-list, patch
git.kernel.org /stable/c/e6ad05e3ae9c84c5a71d7bb2d44dc845ae7990cf
mailing-list, patch
git.kernel.org /stable/c/c0b111ea786ddcc8be0682612830796ece9436c7
mailing-list, patch
git.kernel.org /stable/c/9a523e1da6d88c2034f946adfa4f74b236c95ca9
mailing-list, patch
git.kernel.org /stable/c/a14c55eb461d630b836f80591d8caf1f74e62877
mailing-list, patch
git.kernel.org /stable/c/e08c2e275fa1874de945b87093f925997722ee42
mailing-list, patch
git.kernel.org /stable/c/8649829a1dd25199bbf557b2621cedb4bf9b3050
mailing-list, patch
lists.debian.org /debian-lts-announce/2024/06/msg00016.html
mailing-list

Sources

CVE List CVE-2023-52686
NVD CVE-2023-52686

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary