CVE-2025-68299— 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，该漏洞源于匿名密钥分配延迟，可能导致空指针取消引用。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 4
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fa4ccdccf1489a6dac4369a8c69f11b455b3355c< bd18d2cbc9377c6b270c0b7ea44b0e6ed1d99c07 |
affected |
7e33b15d5a6578a99ebf189cea34983270ae92dd< 5613bde937dfac6725e9c3fc766b9d6b8481e55b |
affected | ||
330e2c514823008b22e6afd2055715bc46dd8d55< d27c71257825dced46104eefe42e4d9964bd032e |
affected | ||
6.17.9< 6.17.11 |
affected |
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一、 漏洞 CVE-2025-68299 基础信息
漏洞信息
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Vulnerability Title
afs: Fix delayed allocation of a cell's anonymous key
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
afs: Fix delayed allocation of a cell's anonymous key
The allocation of a cell's anonymous key is done in a background thread
along with other cell setup such as doing a DNS upcall. In the reported
bug, this is triggered by afs_parse_source() parsing the device name given
to mount() and calling afs_lookup_cell() with the name of the cell.
The normal key lookup then tries to use the key description on the
anonymous authentication key as the reference for request_key() - but it
may not yet be set and so an oops can happen.
This has been made more likely to happen by the fix for dynamic lookup
failure.
Fix this by firstly allocating a reference name and attaching it to the
afs_cell record when the record is created. It can share the memory
allocation with the cell name (unfortunately it can't just overlap the cell
name by prepending it with "afs@" as the cell name already has a '.'
prepended for other purposes). This reference name is then passed to
request_key().
Secondly, the anon key is now allocated on demand at the point a key is
requested in afs_request_key() if it is not already allocated. A mutex is
used to prevent multiple allocation for a cell.
Thirdly, make afs_request_key_rcu() return NULL if the anonymous key isn't
yet allocated (if we need it) and then the caller can return -ECHILD to
drop out of RCU-mode and afs_request_key() can be called.
Note that the anonymous key is kind of necessary to make the key lookup
cache work as that doesn't currently cache a negative lookup, but it's
probably worth some investigation to see if NULL can be used instead.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于匿名密钥分配延迟，可能导致空指针取消引用。
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-2025-68299 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-68299 补丁与修复 (1)
CVE-2025-68299 其他参考 (2)
同批安全公告 · Linux · 2025-12-16 · 共 156 条
| CVE-2025-68192 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68301 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40350 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68284 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68285 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68263 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68315 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68226 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68304 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68255 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68256 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40362 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68314 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68250 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68175 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68171 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68179 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68260 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68303 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68234 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 156 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-68299
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