nfsd：修复 FREE_STATEID 中可能存在的缺陷（CVE-2024-50043）
CVE编号
CVE-2024-50043利用情况
暂无补丁情况
N/A披露时间
2024-10-22漏洞描述
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix possible badness in FREE_STATEID When multiple FREE_STATEIDs are sent for the same delegation stateid, it can lead to a possible either use-after-free or counter refcount underflow errors. In nfsd4_free_stateid() under the client lock we find a delegation stateid, however the code drops the lock before calling nfs4_put_stid(), that allows another FREE_STATE to find the stateid again. The first one will proceed to then free the stateid which leads to either use-after-free or decrementing already zeroed counter.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
|
|---|---|
| https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039 | |
| https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e |
受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | linux | * | Up to (excluding) 5.10.226-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | linux | * | Up to (excluding) 6.1.112-1 | |||||
- 攻击路径 N/A
- 攻击复杂度 N/A
- 权限要求 N/A
- 影响范围 N/A
- 用户交互 N/A
- 可用性 N/A
- 保密性 N/A
- 完整性 N/A
| CWE-ID | 漏洞类型 |
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