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CVE-2026-43323— 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sched/fair中zero_vruntime跟踪修复问题，可能导致任务调度异常。

AI 预测 3.3 利用难度: 理论可行 EPSS 0.16% · P5

可能的 ATT&CK 技术 1 AI

T1499 · Endpoint Denial of Service

影响版本矩阵 7

厂商产品 版本范围状态
Linux Linux d2fc2dcfce47a56ffd414783003cc966c742c8a9< c089147074ed96ff4330739a0559394c19a3dfc8 affected
99673934a89febe664e704550216638dcb2336a8< 87573883c30f1a8555ff720836bb6ea231058539 affected
978d4fe59665c13db692ba96839f9c52d69f13f3< fb61ffb3fb30a161eb5404c27fc7635e275beafd affected
b3d99f43c72b56cf7a104a364e7fb34b0702828b< 1319ea57529e131822bab56bf417c8edc2db9ae8 affected
6.12.78< 6.12.81 affected
6.18.17< 6.18.22 affected
6.19.7< 6.19.12 affected
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一、 漏洞 CVE-2026-43323 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
sched/fair: Fix zero_vruntime tracking fix
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sched/fair: Fix zero_vruntime tracking fix John reported that stress-ng-yield could make his machine unhappy and managed to bisect it to commit b3d99f43c72b ("sched/fair: Fix zero_vruntime tracking"). The combination of yield and that commit was specific enough to hypothesize the following scenario: Suppose we have 2 runnable tasks, both doing yield. Then one will be eligible and one will not be, because the average position must be in between these two entities. Therefore, the runnable task will be eligible, and be promoted a full slice (all the tasks do is yield after all). This causes it to jump over the other task and now the other task is eligible and current is no longer. So we schedule. Since we are runnable, there is no {de,en}queue. All we have is the __{en,de}queue_entity() from {put_prev,set_next}_task(). But per the fingered commit, those two no longer move zero_vruntime. All that moves zero_vruntime are tick and full {de,en}queue. This means, that if the two tasks playing leapfrog can reach the critical speed to reach the overflow point inside one tick's worth of time, we're up a creek. Additionally, when multiple cgroups are involved, there is no guarantee the tick will in fact hit every cgroup in a timely manner. Statistically speaking it will, but that same statistics does not rule out the possibility of one cgroup not getting a tick for a significant amount of time -- however unlikely. Therefore, just like with the yield() case, force an update at the end of every slice. This ensures the update is never more than a single slice behind and the whole thing is within 2 lag bounds as per the comment on entity_key().
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sched/fair中zero_vruntime跟踪修复问题，可能导致任务调度异常。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux d2fc2dcfce47a56ffd414783003cc966c742c8a9 ~ c089147074ed96ff4330739a0559394c19a3dfc8 -
Linux Linux 6.12.78 ~ 6.12.81 -

二、漏洞 CVE-2026-43323 的公开POC

# POC 描述 源链接 神龙链接
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三、漏洞 CVE-2026-43323 的情报信息

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CVE-2026-43323 补丁与修复 (4)

同批安全公告 · Linux · 2026-05-08 · 共 197 条

CVE-2026-43341 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43402 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43414 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43384 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43304 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43379 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43376 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43465 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43378 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43383 9.4 CRITICAL Linux kernel 安全漏洞
CVE-2026-43406 9.1 CRITICAL Linux kernel 安全漏洞
CVE-2026-43407 9.1 CRITICAL Linux kernel 安全漏洞
CVE-2026-43284 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-43334 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-43322 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-43403 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-43391 8.8 HIGH Linux kernel 安全漏洞
CVE-2026-43291 8.3 HIGH Linux kernel 安全漏洞
CVE-2026-43365 8.2 HIGH Linux kernel 安全漏洞
CVE-2026-43466 8.2 HIGH Linux kernel 安全漏洞

显示前 20 条，共 197 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43323

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