CVE-2026-74628— 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基金会开源的一个操作系统内核。 Linux kernel 2.6.12版本存在安全漏洞，该漏洞源于X25协议栈的套接字定时器处理不当，导致释放后重用，可能造成内存损坏或系统崩溃。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ba925a2e98ce967a0e71c5bcbcf5dbd3facaf0c8 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6b79659590f0f82a9b8efd2ffd55ec6399ebfc33 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< fdd9ac50b9b61ef2b2d52c5156aff788be91454d |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1fc9f6d2c7c9fdb341bfe8ca449c990632299ea6 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3c4919be5d910db4beebca420953858606fba7d8 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4bc522b33438fefc3272840ae5988771863a4f1f |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e92c7e2b41d1528a830bc64c5e4e46dfa8133dda |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2195424c3da2ef1829a63b807e3a900a90e57d85 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-74628 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
net/x25: fix use-after-free of the socket by its timers
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/x25: fix use-after-free of the socket by its timers
The x25 timers are armed with mod_timer() and cancelled with
timer_delete(), so a pending timer holds no reference on the socket and a
cancel does not wait for a callback already running on another CPU.
x25_heartbeat_expiry() also rearms unconditionally, so it can reinstall
sk->sk_timer after __x25_destroy_socket() has passed its cancel point.
The following __sock_put() frees the socket while the timer is still
queued, and the next expiry uses freed memory. KASAN reports a
slab-use-after-free on the kmalloc-2k object freed by close().
timer_delete_sync() cannot be used here: x25_heartbeat_expiry() and
x25_timer_expiry() both reach the cancels from inside the timer they
would wait on, through __x25_destroy_socket() and x25_disconnect().
Arm the timers with sk_reset_timer() and cancel them with sk_stop_timer()
so that an armed timer owns a reference, and release it in both expiry
handlers. Rearm the heartbeat only while sk_hashed(sk) is still true,
since __x25_destroy_socket() unlinks the socket before dropping it. Arm
the deferred destroy timer the same way and drop its reference in
x25_destroy_timer().
Reproduced on net with KASAN, with the heartbeat period shortened so the
window recurs. With this patch the reproducer no longer triggers a
report and /proc/net/x25 drains.
Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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基金会开源的一个操作系统内核。 Linux kernel 2.6.12版本存在安全漏洞，该漏洞源于X25协议栈的套接字定时器处理不当，导致释放后重用，可能造成内存损坏或系统崩溃。
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-2026-74628 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-74628 补丁与修复 (7)
CVE-2026-74628 其他参考 (1)
同批安全公告 · Linux · 2026-08-22 · 共 149 条
| CVE-2026-74705 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74612 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74616 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74662 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74727 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74611 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74597 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74723 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74730 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74608 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74591 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74669 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74688 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74617 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74588 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74587 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74586 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74712 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74665 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74615 | 8.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 149 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-74628
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