CVE-2026-52977— 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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于futex requeue-PI在信号或超时唤醒时存在竞争条件，可能导致高优先级任务和低优先级任务之间的锁获取问题，从而造成系统锁死。
可能的 ATT&CK 技术 1 AI
T1053 · Scheduled Task/Job影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 07d91ef510fb16a2e0ca7453222105835b7ba3b8< e5dbae3572757cecc3d3ec7cf96cbcc9cd9f016c |
affected |
07d91ef510fb16a2e0ca7453222105835b7ba3b8< 4e0ed44e51727d56244a822ab941efe507c47966 |
affected | ||
07d91ef510fb16a2e0ca7453222105835b7ba3b8< e3f95b1ba242e37093305812df7fdbe7288a43ac |
affected | ||
07d91ef510fb16a2e0ca7453222105835b7ba3b8< 0aacb6d18f76552e3e0ee25d9f40d21b3486f4cf |
affected | ||
07d91ef510fb16a2e0ca7453222105835b7ba3b8< 69a7cfc66405aeaa2483147653d031b3592ffc9c |
affected | ||
07d91ef510fb16a2e0ca7453222105835b7ba3b8< 0304d60abb9dcc02bc7fe6d1850f4ca206e8f1a0 |
affected | ||
07d91ef510fb16a2e0ca7453222105835b7ba3b8< bc7304f3ae20972d11db6e0b1b541c63feda5f05 |
affected | ||
5.15 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2026-52977 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
futex: Prevent lockup in requeue-PI during signal/ timeout wakeup
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
futex: Prevent lockup in requeue-PI during signal/ timeout wakeup
During wait-requeue-pi (task A) and requeue-PI (task B) the following
race can happen:
Task A Task B
futex_wait_requeue_pi()
futex_setup_timer()
futex_do_wait()
futex_requeue()
CLASS(hb, hb1)(&key1);
CLASS(hb, hb2)(&key2);
*timeout*
futex_requeue_pi_wakeup_sync()
requeue_state = Q_REQUEUE_PI_IGNORE
*blocks on hb->lock*
futex_proxy_trylock_atomic()
futex_requeue_pi_prepare()
Q_REQUEUE_PI_IGNORE => -EAGAIN
double_unlock_hb(hb1, hb2)
*retry*
Task B acquires both hb locks and attempts to acquire the PI-lock of the
top most waiter (task B). Task A is leaving early due to a signal/
timeout and started removing itself from the queue. It updates its
requeue_state but can not remove it from the list because this requires
the hb lock which is owned by task B.
Usually task A is able to swoop the lock after task B unlocked it.
However if task B is of higher priority then task A may not be able to
wake up in time and acquire the lock before task B gets it again.
Especially on a UP system where A is never scheduled.
As a result task A blocks on the lock and task B busy loops, trying to
make progress but live locks the system instead. Tragic.
This can be fixed by removing the top most waiter from the list in this
case. This allows task B to grab the next top waiter (if any) in the
next iteration and make progress.
Remove the top most waiter if futex_requeue_pi_prepare() fails.
Let the waiter conditionally remove itself from the list in
handle_early_requeue_pi_wakeup().
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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于futex requeue-PI在信号或超时唤醒时存在竞争条件，可能导致高优先级任务和低优先级任务之间的锁获取问题，从而造成系统锁死。
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-2026-52977 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2026-52977 补丁与修复 (7)
同批安全公告 · Linux · 2026-06-24 · 共 219 条
| CVE-2026-53049 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52993 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52989 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52986 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52982 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53002 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53006 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53045 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53086 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53046 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52955 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53010 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53088 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52914 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53055 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52924 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52931 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52999 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53043 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52958 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 219 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-52977
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