cnvd - cnvd-2025-02550

cnvd-2025-02550

Vulnerability from cnvd

Title: Linux kernel缓冲区溢出漏洞（CNVD-2025-02550）

Description:

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。

Linux kernel存在缓冲区溢出漏洞，攻击者可利用该漏洞导致EROFS数据损坏。

Severity: 中

Patch Name: Linux kernel缓冲区溢出漏洞（CNVD-2025-02550）的补丁

Patch Description:

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。

Linux kernel存在缓冲区溢出漏洞，攻击者可利用该漏洞导致EROFS数据损坏。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

厂商已发布了漏洞修复程序，请及时关注更新： https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

Reference: https://nvd.nist.gov/vuln/detail/CVE-2023-52497

Impacted products

Name
['Linux Linux kernel >=6.7，<6.7.3', 'Linux Linux kernel >=6.2，<6.6.15', 'Linux Linux kernel >=5.11，<5.15.150', 'Linux Linux kernel >=5.3，<5.4.285', 'Linux Linux kernel >=5.16，<6.1.76', 'Linux Linux kernel >=5.5，<5.10.211']

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  "serverity": "\u4e2d",
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}

CVE-2023-52497 (GCVE-0-2023-52497)

Vulnerability from cvelistv5

Published

2024-02-29 15:52

Modified

2025-05-04 07:38

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: erofs: fix lz4 inplace decompression Currently EROFS can map another compressed buffer for inplace decompression, that was used to handle the cases that some pages of compressed data are actually not in-place I/O. However, like most simple LZ77 algorithms, LZ4 expects the compressed data is arranged at the end of the decompressed buffer and it explicitly uses memmove() to handle overlapping: __________________________________________________________ |_ direction of decompression --> ____ |_ compressed data _| Although EROFS arranges compressed data like this, it typically maps two individual virtual buffers so the relative order is uncertain. Previously, it was hardly observed since LZ4 only uses memmove() for short overlapped literals and x86/arm64 memmove implementations seem to completely cover it up and they don't have this issue. Juhyung reported that EROFS data corruption can be found on a new Intel x86 processor. After some analysis, it seems that recent x86 processors with the new FSRM feature expose this issue with "rep movsb". Let's strictly use the decompressed buffer for lz4 inplace decompression for now. Later, as an useful improvement, we could try to tie up these two buffers together in the correct order.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/9ff2d260b25df6fe1341a79113d88fecf6bd553e
	https://git.kernel.org/stable/c/a0180e940cf1aefa7d516e20b259ad34f7a8b379
	https://git.kernel.org/stable/c/77cbc04a1a8610e303a0e0d74f2676667876a184
	https://git.kernel.org/stable/c/33bf23c9940dbd3a22aad7f0cda4c84ed5701847
	https://git.kernel.org/stable/c/f36d200a80a3ca025532ed60dd1ac21b620e14ae
	https://git.kernel.org/stable/c/bffc4cc334c5bb31ded54bc3cfd651735a3cb79e
	https://git.kernel.org/stable/c/3c12466b6b7bf1e56f9b32c366a3d83d87afb4de

Impacted products

Vendor

Product

Version

▼

Linux

Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9
Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9
Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9
Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9
Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9
Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9
Version: 0ffd71bcc3a03ebb3551661a36052488369c4de9

Linux

Version: 5.3

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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