CVE-2026-23356— 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drbd_al_begin_io_nonblock中逻辑错误，可能导致竞争条件和内核崩溃。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< 933d161baa3794547adee621c0bf52cbf2c1b3cd |
affected |
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< cf01aa6288e1190f89865e765056e2a9d8190639 |
affected | ||
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< 7752569fc78e89794ce28946529850282233f99d |
affected | ||
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< e91d8d6565b7819d13dab21d4dbed5b45efba59b |
affected | ||
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< eef1390125b660b8b61f9f227a03bb9c5e6d36a5 |
affected | ||
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< d1ef3aed4df2ef1fe46befd8f2da9a6ec5445508 |
affected | ||
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< f558e5404a72054b525dced1a0c66aa95a144153 |
affected | ||
08a1ddab6df7d3c7b6341774cb1cf4b21b96a214< ab140365fb62c0bdab22b2f516aff563b2559e3b |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-23356 基础信息
漏洞信息
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Vulnerability Title
drbd: fix "LOGIC BUG" in drbd_al_begin_io_nonblock()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
drbd: fix "LOGIC BUG" in drbd_al_begin_io_nonblock()
Even though we check that we "should" be able to do lc_get_cumulative()
while holding the device->al_lock spinlock, it may still fail,
if some other code path decided to do lc_try_lock() with bad timing.
If that happened, we logged "LOGIC BUG for enr=...",
but still did not return an error.
The rest of the code now assumed that this request has references
for the relevant activity log extents.
The implcations are that during an active resync, mutual exclusivity of
resync versus application IO is not guaranteed. And a potential crash
at this point may not realizs that these extents could have been target
of in-flight IO and would need to be resynced just in case.
Also, once the request completes, it will give up activity log references it
does not even hold, which will trigger a BUG_ON(refcnt == 0) in lc_put().
Fix:
Do not crash the kernel for a condition that is harmless during normal
operation: also catch "e->refcnt == 0", not only "e == NULL"
when being noisy about "al_complete_io() called on inactive extent %u\n".
And do not try to be smart and "guess" whether something will work, then
be surprised when it does not.
Deal with the fact that it may or may not work. If it does not, remember a
possible "partially in activity log" state (only possible for requests that
cross extent boundaries), and return an error code from
drbd_al_begin_io_nonblock().
A latter call for the same request will then resume from where we left off.
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drbd_al_begin_io_nonblock中逻辑错误，可能导致竞争条件和内核崩溃。
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-2026-23356 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-23356 补丁与修复 (6)
同批安全公告 · Linux · 2026-03-25 · 共 116 条
| CVE-2026-23395 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31788 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23340 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23336 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23350 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23351 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23317 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23306 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23372 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23378 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23383 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23391 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23392 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23393 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23280 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23288 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23364 | 7.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23294 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23354 | Linux kernel 安全漏洞 | |
| CVE-2026-23355 | Linux kernel 安全漏洞 |
显示前 20 条，共 116 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-23356
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