CVE-2026-23355— 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，该漏洞源于清除deferred_qc后未取消待处理工作，可能导致警告触发。
可能的 ATT&CK 技术 2 AI
T1499 · Endpoint Denial of Service T1499.004 · Application or System Exploitation影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ce22aaed011206fed9cbd8c9c2d44718607f31ee< 0d12453818c35e1ded84633152c6b05002ae48b9 |
affected |
888cd7e40adb2ef4af1b4d3b6e2e83ad409ae8c2< 6c5e8f16b5e8e614e829aaf38619bdd79107bb0a |
affected | ||
5d61a38a60e62750526d94663b69b7ac5c7f07a5< 58e658763ba2aa9168d8516b98a6314d7461a53e |
affected | ||
0ea84089dbf62a92dc7889c79e6b18fc89260808< aac9b27f7c1f2b2cf7f50a9ca633ecbbcaf22af9 |
affected | ||
33abac5b5a5303ba2c66d89e063a806033be07fc |
affected | ||
21e0d7a15a789e99be89231dae25cb6ffc482a7c |
affected | ||
6.18.14< 6.18.18 |
affected | ||
6.19.4< 6.19.7 |
affected |
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一、 漏洞 CVE-2026-23355 基础信息
漏洞信息
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Vulnerability Title
ata: libata: cancel pending work after clearing deferred_qc
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ata: libata: cancel pending work after clearing deferred_qc
Syzbot reported a WARN_ON() in ata_scsi_deferred_qc_work(), caused by
ap->ops->qc_defer() returning non-zero before issuing the deferred qc.
ata_scsi_schedule_deferred_qc() is called during each command completion.
This function will check if there is a deferred QC, and if
ap->ops->qc_defer() returns zero, meaning that it is possible to queue the
deferred qc at this time (without being deferred), then it will queue the
work which will issue the deferred qc.
Once the work get to run, which can potentially be a very long time after
the work was scheduled, there is a WARN_ON() if ap->ops->qc_defer() returns
non-zero.
While we hold the ap->lock both when assigning and clearing deferred_qc,
and the work itself holds the ap->lock, the code currently does not cancel
the work after clearing the deferred qc.
This means that the following scenario can happen:
1) One or several NCQ commands are queued.
2) A non-NCQ command is queued, gets stored in ap->deferred_qc.
3) Last NCQ command gets completed, work is queued to issue the deferred
qc.
4) Timeout or error happens, ap->deferred_qc is cleared. The queued work is
currently NOT canceled.
5) Port is reset.
6) One or several NCQ commands are queued.
7) A non-NCQ command is queued, gets stored in ap->deferred_qc.
8) Work is finally run. Yet at this time, there is still NCQ commands in
flight.
The work in 8) really belongs to the non-NCQ command in 2), not to the
non-NCQ command in 7). The reason why the work is executed when it is not
supposed to, is because it was never canceled when ap->deferred_qc was
cleared in 4). Thus, ensure that we always cancel the work after clearing
ap->deferred_qc.
Another potential fix would have been to let ata_scsi_deferred_qc_work() do
nothing if ap->ops->qc_defer() returns non-zero. However, canceling the
work when clearing ap->deferred_qc seems slightly more logical, as we hold
the ap->lock when clearing ap->deferred_qc, so we know that the work cannot
be holding the lock. (The function could be waiting for the lock, but that
is okay since it will do nothing if ap->deferred_qc is not set.)
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，该漏洞源于清除deferred_qc后未取消待处理工作，可能导致警告触发。
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-2026-23355 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-23355 补丁与修复 (4)
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-2026-23356 | 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-2026-23355
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