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CVE-2023-52526

erofs: fix memory leak of LZMA global compressed deduplication

MEDIUM
5.5
CVSS Score
Published: March 2, 2024 at 09:52 PM UTC
Updated: June 17, 2026 at 06:42 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: fix memory leak of LZMA global compressed deduplication When stressing microLZMA EROFS images with the new global compressed deduplication feature enabled (`-Ededupe`), I found some short-lived temporary pages weren't properly released, which could slowly cause unexpected OOMs hours later. Let's fix it now (LZ4 and DEFLATE don't have this issue.)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.1 ≤ v < 6.1.576.1 ≤ v < 6.5.76.1 ≤ v < 6.66.2 ≤ v < 6.5.75c2a64252c5dc4cfe78e5b2a531c118894e3d1556.6 rc16.6 rc26.6 rc36.6 rc4
Vendor states this is fixed in 6a5a8f0a9740f865693d5aa97a42cc4504538e18 (fixed)
Vendor states this is fixed in 75a5221630fe5aa3fedba7a06be618db0f79ba1e (fixed)
Vendor states this is fixed in c955751cbf864cf2055117dd3fe7f780d2a57b56 (fixed)
Vendor states this is fixed in 6.1 (unaffected)
Vendor states this is fixed in 6.1.57 (unaffected)
Vendor states this is fixed in 6.5.7 (unaffected)
Vendor states this is fixed in 6.6 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6a5a8f0a9740f865693d5aa97a42cc4504538e18
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/75a5221630fe5aa3fedba7a06be618db0f79ba1e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c955751cbf864cf2055117dd3fe7f780d2a57b56

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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