Is CVE-2023-53266 in the CISA KEV catalog?

No. CVE-2023-53266 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-53266?

CVE-2023-53266 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2023-53266?

CVE-2023-53266 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-53266?

Upgrade linux on debian 13 to 6.3.7-1 or later. Fixes are available for 69 affected products.

CVE & CISA-KEV Catalog

CVE-2023-53266

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC version and conduit checks fail and -EOPNOTSUPP is returned without freeing the allocated memory. Fix the same by moving the allocation after the SMCCC version and conduit checks.

CWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available

linuxDebian

Fixed in:6.3.7-1CVE-2023-53266

bpftoolRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

bpftoolRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

bpftool-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

bpftool-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernelRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernelRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-abi-stablelistsRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-abi-stablelistsRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-coreRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-coreRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debugRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debugRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-coreRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-coreRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-develRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-develRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-modulesRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-modulesRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-modules-extraRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debug-modules-extraRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-aarch64Rocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-aarch64Red Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-ppc64leRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-ppc64leRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-s390xRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-s390xRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-x86_64Rocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-debuginfo-common-x86_64Red Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-develRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-develRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-docRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-docRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-modulesRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-modulesRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-modules-extraRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-modules-extraRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-toolsRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-toolsRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-tools-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-tools-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-tools-libsRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-tools-libsRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-tools-libs-develRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-tools-libs-develRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdumpRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdumpRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-coreRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-coreRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-develRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-develRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-modulesRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-modulesRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-modules-extraRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

kernel-zfcpdump-modules-extraRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

perfRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

perfRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

perf-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

perf-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

python3-perfRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

python3-perfRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

python3-perf-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

python3-perf-debuginfoRocky

Fixed in:0:4.18.0-553.el8_10RHSA-2024:3138

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Patch2

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13934	High	7.5	64%	-	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	21%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-14.