CVE-2025-38488— 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crypt_message函数中使用释放后重用。
影响版本矩阵 22
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8f14a476abba13144df5434871a7225fd29af633< 5d047b12f86cc3b9fde1171c02d9bccf4dba0632 |
affected |
ef51c0d544b1518b35364480317ab6d3468f205d< 6550b2bef095d0dd2d2c8390d2ea4c3837028833 |
affected | ||
bce966530fd5542bbb422cb45ecb775f7a1a6bc3< 9a1d3e8d40f151c2d5a5f40c410e6e433f62f438 |
affected | ||
0809fb86ad13b29e1d6d491364fc7ea4fb545995< 15a0a5de49507062bc3be4014a403d8cea5533de |
affected | ||
b0abcd65ec545701b8793e12bc27dc98042b151a< 2a76bc2b24ed889a689fb1c9015307bf16aafb5b |
affected | ||
b0abcd65ec545701b8793e12bc27dc98042b151a< 8ac90f6824fc44d2e55a82503ddfc95defb19ae0 |
affected | ||
b0abcd65ec545701b8793e12bc27dc98042b151a< b220bed63330c0e1733dc06ea8e75d5b9962b6b6 |
affected | ||
538c26d9bf70c90edc460d18c81008a4e555925a |
affected | ||
| … +14 条更多 | |||
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一、 漏洞 CVE-2025-38488 基础信息
漏洞信息
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Vulnerability Title
smb: client: fix use-after-free in crypt_message when using async crypto
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix use-after-free in crypt_message when using async crypto
The CVE-2024-50047 fix removed asynchronous crypto handling from
crypt_message(), assuming all crypto operations are synchronous.
However, when hardware crypto accelerators are used, this can cause
use-after-free crashes:
crypt_message()
// Allocate the creq buffer containing the req
creq = smb2_get_aead_req(..., &req);
// Async encryption returns -EINPROGRESS immediately
rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
// Free creq while async operation is still in progress
kvfree_sensitive(creq, ...);
Hardware crypto modules often implement async AEAD operations for
performance. When crypto_aead_encrypt/decrypt() returns -EINPROGRESS,
the operation completes asynchronously. Without crypto_wait_req(),
the function immediately frees the request buffer, leading to crashes
when the driver later accesses the freed memory.
This results in a use-after-free condition when the hardware crypto
driver later accesses the freed request structure, leading to kernel
crashes with NULL pointer dereferences.
The issue occurs because crypto_alloc_aead() with mask=0 doesn't
guarantee synchronous operation. Even without CRYPTO_ALG_ASYNC in
the mask, async implementations can be selected.
Fix by restoring the async crypto handling:
- DECLARE_CRYPTO_WAIT(wait) for completion tracking
- aead_request_set_callback() for async completion notification
- crypto_wait_req() to wait for operation completion
This ensures the request buffer isn't freed until the crypto operation
completes, whether synchronous or asynchronous, while preserving the
CVE-2024-50047 fix.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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crypt_message函数中使用释放后重用。
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-2025-38488 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 · 2025-07-28 · 共 29 条
| CVE-2025-38490 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38471 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38472 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38476 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38495 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38491 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38477 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38485 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38486 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38484 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38494 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38478 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38475 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38470 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38493 | Linux kernel 安全漏洞 | |
| CVE-2025-38492 | Linux kernel 安全漏洞 | |
| CVE-2025-38483 | Linux kernel 安全漏洞 | |
| CVE-2025-38496 | Linux kernel 多款产品安全漏洞 | |
| CVE-2025-38497 | Linux kernel 安全漏洞 | |
| CVE-2025-38489 | Linux kernel 安全漏洞 |
显示前 20 条，共 29 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38488
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