CVE-2026-58099— Memory safety bugs in kqueue copy-on-fork implementation
一分钟漏洞结论
影响对象
FreeBSD FreeBSD
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。
When copying knotes from a parent kqueue to a child, the copy code did not correctly exclude marker knotes (used internally to track list traversal position) before marking them as in-flux and releasing the kqueue lock. If another thread freed a marker while t
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一、 漏洞 CVE-2026-58099 基础信息
漏洞信息
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Vulnerability Title
Memory safety bugs in kqueue copy-on-fork implementation
来源: CVE Program / CVE List V5
Vulnerability Description
When copying knotes from a parent kqueue to a child, the copy code did not correctly exclude marker knotes (used internally to track list traversal position) before marking them as in-flux and releasing the kqueue lock. If another thread freed a marker while the lock was dropped, the subsequent in-flux decrement operated on freed memory.
An unprivileged local user may be able to exploit these races to escalate privileges.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-58099 的公开POC
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CVE-2026-58099 其他参考 (1)
同批安全公告 · FreeBSD · 2026-10-15 · 共 13 条
| CVE-2026-58098 | Heap out-of-bounds access in semop(2) | |
| CVE-2026-58100 | Memory safety bugs in kqueue copy-on-fork implementation | |
| CVE-2026-101302 | Remote DoS via receive-side kernel TLS | |
| CVE-2026-101306 | Multiple jail filesystem root escapes | |
| CVE-2026-101305 | Multiple jail filesystem root escapes | |
| CVE-2026-101304 | Multiple jail filesystem root escapes | |
| CVE-2026-101303 | IPv6 UDP sendto(2) bypasses jail loopback restriction | |
| CVE-2026-101307 | Remotely triggerable buffer overflow in tcp_rack | |
| CVE-2026-101308 | TOCTOU race between sound(4) buffer resizing and mmap | |
| CVE-2026-101311 | Multiple vulnerabilities in bhyve device models | |
| CVE-2026-101309 | Multiple vulnerabilities in bhyve device models | |
| CVE-2026-101310 | Multiple vulnerabilities in bhyve device models |
IV. Related Vulnerabilities
Same product: FreeBSD
-
CVE-2026-101311
Multiple vulnerabilities in bhyve device models -
CVE-2026-101310
Multiple vulnerabilities in bhyve device models -
CVE-2026-101309
Multiple vulnerabilities in bhyve device models -
CVE-2026-101308
TOCTOU race between sound(4) buffer resizing and mmap -
CVE-2026-101307
Remotely triggerable buffer overflow in tcp_rack
Same vendor: FreeBSD
-
CVE-2026-101311
Multiple vulnerabilities in bhyve device models -
CVE-2026-101310
Multiple vulnerabilities in bhyve device models -
CVE-2026-101309
Multiple vulnerabilities in bhyve device models -
CVE-2026-101308
TOCTOU race between sound(4) buffer resizing and mmap -
CVE-2026-101307
Remotely triggerable buffer overflow in tcp_rack
Same weakness: CWE-362
-
CVE-2026-101311
Multiple vulnerabilities in bhyve device models -
CVE-2026-101309
Multiple vulnerabilities in bhyve device models -
CVE-2026-58100
Memory safety bugs in kqueue copy-on-fork implementation -
CVE-2026-86562
Dpdk: dpdk: control-queue descriptor double-fetch overflows -
CVE-2026-100394
Nezha Monitoring: Whole-instance DoS in Nezha dashboard: a m
V. Comments for CVE-2026-58099
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