What’s Vulnerable › Vulnerabilities

CVE-2023-52526: erofs: fix memory leak of LZMA global compressed deduplication

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-02 · updated 2026-06-17
• Weakness: CWE-401

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 products

• Linux kernel: from 6.1 before 6.1.57; from 6.2 before 6.5.7; 6.6-rc1, 6.6-rc2, 6.6-rc3, 6.6-rc4 — fixed in 6.1.57, 6.5.7

How to fix

Upgrade to a fixed version: Linux kernel 6.1.57, 6.5.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6a5a8f0a9740f865693d5aa97a42cc4504538e18
• https://git.kernel.org/stable/c/75a5221630fe5aa3fedba7a06be618db0f79ba1e
• https://git.kernel.org/stable/c/c955751cbf864cf2055117dd3fe7f780d2a57b56
• https://git.kernel.org/stable/c/6a5a8f0a9740f865693d5aa97a42cc4504538e18
• https://git.kernel.org/stable/c/75a5221630fe5aa3fedba7a06be618db0f79ba1e
• https://git.kernel.org/stable/c/c955751cbf864cf2055117dd3fe7f780d2a57b56

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