CVE-2025-39792— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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存在安全漏洞，该漏洞源于未正确处理写入BIOs到分区设备的限制，可能导致死锁或无效写入扇区值。
可能的 ATT&CK 技术 1 AI
T1496 · Resource Hijacking影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | f211268ed1f9bdf48f06a3ead5f5d88437450579< d10bf66d9f9335ffc7521b3029b114f50604cabe |
affected |
f211268ed1f9bdf48f06a3ead5f5d88437450579< f5dd256333c08ab44b5aec4a8118cb04c0f20c54 |
affected | ||
f211268ed1f9bdf48f06a3ead5f5d88437450579< 4e9fef1cf0243d665d75c371cc80be6156cd30a2 |
affected | ||
f211268ed1f9bdf48f06a3ead5f5d88437450579< 2df7168717b7d2d32bcf017c68be16e4aae9dd13 |
affected | ||
6.10 |
affected | ||
< 6.10 |
unaffected | ||
6.12.43≤ 6.12.* |
unaffected | ||
6.15.11≤ 6.15.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2025-39792 基础信息
漏洞信息
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Vulnerability Title
dm: Always split write BIOs to zoned device limits
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
dm: Always split write BIOs to zoned device limits
Any zoned DM target that requires zone append emulation will use the
block layer zone write plugging. In such case, DM target drivers must
not split BIOs using dm_accept_partial_bio() as doing so can potentially
lead to deadlocks with queue freeze operations. Regular write operations
used to emulate zone append operations also cannot be split by the
target driver as that would result in an invalid writen sector value
return using the BIO sector.
In order for zoned DM target drivers to avoid such incorrect BIO
splitting, we must ensure that large BIOs are split before being passed
to the map() function of the target, thus guaranteeing that the
limits for the mapped device are not exceeded.
dm-crypt and dm-flakey are the only target drivers supporting zoned
devices and using dm_accept_partial_bio().
In the case of dm-crypt, this function is used to split BIOs to the
internal max_write_size limit (which will be suppressed in a different
patch). However, since crypt_alloc_buffer() uses a bioset allowing only
up to BIO_MAX_VECS (256) vectors in a BIO. The dm-crypt device
max_segments limit, which is not set and so default to BLK_MAX_SEGMENTS
(128), must thus be respected and write BIOs split accordingly.
In the case of dm-flakey, since zone append emulation is not required,
the block layer zone write plugging is not used and no splitting of BIOs
required.
Modify the function dm_zone_bio_needs_split() to use the block layer
helper function bio_needs_zone_write_plugging() to force a call to
bio_split_to_limits() in dm_split_and_process_bio(). This allows DM
target drivers to avoid using dm_accept_partial_bio() for write
operations on zoned DM devices.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability 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存在安全漏洞，该漏洞源于未正确处理写入BIOs到分区设备的限制，可能导致死锁或无效写入扇区值。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2025-39792 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-09-12 · 共 7 条
| CVE-2025-39793 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39798 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39794 | Linux kernel 安全漏洞 | |
| CVE-2025-39795 | Linux kernel 安全漏洞 | |
| CVE-2025-39796 | Linux kernel 安全漏洞 | |
| CVE-2025-39797 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-39792
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