CVE-2025-38338— Linux kernel 安全漏洞
可能的 ATT&CK 技术 1AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 000dbe0bec058cbf2ca9e156e4a5584f5158b0f9< 14f5549ad163be2c018abc1bb38370fff617a243 | affected |
000dbe0bec058cbf2ca9e156e4a5584f5158b0f9< 5bf0b9eeb0174686f22c2e5b8fb9f47ad25da6f5 | affected | ||
000dbe0bec058cbf2ca9e156e4a5584f5158b0f9< 1e93b61d3eaa14bfebcc2716ac09d43f3845d420 | affected | ||
000dbe0bec058cbf2ca9e156e4a5584f5158b0f9< 4c10fa44bc5f700e2ea21de2fbae520ba21f19d9 | affected | ||
6.4 | affected | ||
< 6.4 | unaffected | ||
6.6.95≤ 6.6.* | unaffected | ||
6.12.35≤ 6.12.* | unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2025-38338 基础信息
漏洞信息
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Vulnerability Title
fs/nfs/read: fix double-unlock bug in nfs_return_empty_folio()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/nfs/read: fix double-unlock bug in nfs_return_empty_folio() Sometimes, when a file was read while it was being truncated by another NFS client, the kernel could deadlock because folio_unlock() was called twice, and the second call would XOR back the `PG_locked` flag. Most of the time (depending on the timing of the truncation), nobody notices the problem because folio_unlock() gets called three times, which flips `PG_locked` back off: 1. vfs_read, nfs_read_folio, ... nfs_read_add_folio, nfs_return_empty_folio 2. vfs_read, nfs_read_folio, ... netfs_read_collection, netfs_unlock_abandoned_read_pages 3. vfs_read, ... nfs_do_read_folio, nfs_read_add_folio, nfs_return_empty_folio The problem is that nfs_read_add_folio() is not supposed to unlock the folio if fscache is enabled, and a nfs_netfs_folio_unlock() check is missing in nfs_return_empty_folio(). Rarely this leads to a warning in netfs_read_collection(): ------------[ cut here ]------------ R=0000031c: folio 10 is not locked WARNING: CPU: 0 PID: 29 at fs/netfs/read_collect.c:133 netfs_read_collection+0x7c0/0xf00 [...] Workqueue: events_unbound netfs_read_collection_worker RIP: 0010:netfs_read_collection+0x7c0/0xf00 [...] Call Trace: <TASK> netfs_read_collection_worker+0x67/0x80 process_one_work+0x12e/0x2c0 worker_thread+0x295/0x3a0 Most of the time, however, processes just get stuck forever in folio_wait_bit_common(), waiting for `PG_locked` to disappear, which never happens because nobody is really holding the folio lock.
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nfs/read中双重解锁问题，可能导致死锁。
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-2025-38338 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 · 2025-07-10 · 共 84 条
| CVE-2025-38318 | Linux kernel 安全漏洞 | |
| CVE-2025-38327 | Linux kernel 安全漏洞 | |
| CVE-2025-38314 | Linux kernel 安全漏洞 | |
| CVE-2025-38316 | Linux kernel 安全漏洞 | |
| CVE-2025-38312 | Linux kernel 安全漏洞 | |
| CVE-2025-38310 | Linux kernel 安全漏洞 | |
| CVE-2025-38309 | Linux kernel 安全漏洞 | |
| CVE-2025-38308 | Linux kernel 安全漏洞 | |
| CVE-2025-38306 | Linux kernel 安全漏洞 | |
| CVE-2025-38311 | Linux kernel 安全漏洞 | |
| CVE-2025-38315 | Linux kernel 安全漏洞 | |
| CVE-2025-38317 | Linux kernel 安全漏洞 | |
| CVE-2025-38319 | Linux kernel 安全漏洞 | |
| CVE-2025-38320 | Linux kernel 安全漏洞 | |
| CVE-2025-38321 | Linux kernel 安全漏洞 | |
| CVE-2025-38322 | Linux kernel 安全漏洞 | |
| CVE-2025-38323 | Linux kernel 安全漏洞 | |
| CVE-2025-38324 | Linux kernel 安全漏洞 | |
| CVE-2025-38325 | Linux kernel 安全漏洞 | |
| CVE-2025-38326 | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2025-38338
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