CVE-2026-52924— 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 4.15版本存在安全漏洞，该漏洞源于SCTP在处理Stale Cookie时未正确清理输出队列和无效化调度器缓存指针，可能导致释放后重用。
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 | 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< 84b7a319105db2f917ccdcf502bdc866082b1285 |
affected |
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< f46e1d1a758878f0d22c4fbbd1bf42bb7165d1e8 |
affected | ||
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< 3c0741a441a7df7099d7ca6a64a6a0de09c677c8 |
affected | ||
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< 2afc9e684dc7fecf73db1edc937ebbc47b4b68dc |
affected | ||
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< 1d4652f677906a64487c13f9ace54b0eb263b5d0 |
affected | ||
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< a6207349e703cfc04756a4d16dec9176135813a5 |
affected | ||
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< 83ade59e5da365f4bf8bce72c5a38774202b442f |
affected | ||
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51< e374b22e9b07b72a25909621464ff74096151bfb |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-52924 基础信息
漏洞信息
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Vulnerability Title
sctp: purge outqueue on stale COOKIE-ECHO handling
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: purge outqueue on stale COOKIE-ECHO handling
sctp_stream_update() is only invoked when the association is moved into
COOKIE_WAIT during association setup/reconfiguration. In this path, the
outbound stream scheduler state (stream->out_curr) is expected to be
clean, since no user data should have been transmitted yet unless the
state machine has already partially progressed.
However, a corner case exists in sctp_sf_do_5_2_6_stale(): when a
Stale Cookie ERROR is received, the association is rolled back from
COOKIE_ECHOED to COOKIE_WAIT. In this scenario, user data may already
have been queued and even bundled with the COOKIE-ECHO chunk.
During the rollback, sctp_stream_update() frees the old stream table
and installs a new one, but it does not invalidate stream->out_curr.
As a result, out_curr may still point to a freed sctp_stream_out
entry from the previous stream state.
Later, SCTP scheduler dequeue paths (FCFS, RR, PRIO, etc.) rely on
stream->out_curr->ext, which can lead to use-after-free once the old
stream state has been released via sctp_stream_free().
This results in crashes such as (reported by Yuqi):
BUG: KASAN: slab-use-after-free in sctp_sched_fcfs_dequeue+0x13a/0x140
Read of size 8 at addr ff1100004d4d3208 by task mini_poc/9312
CPU: 1 UID: 1001 PID: 9312 Comm: mini_poc Not tainted
7.1.0-rc1-00305-gbd3a4795d574 #5 PREEMPT(full)
sctp_sched_fcfs_dequeue+0x13a/0x140
sctp_outq_flush+0x1603/0x33e0
sctp_do_sm+0x31c9/0x5d30
sctp_assoc_bh_rcv+0x392/0x6f0
sctp_inq_push+0x1db/0x270
sctp_rcv+0x138d/0x3c10
Fix this by fully purging the association outqueue when handling the
Stale Cookie case. This ensures all pending transmit and retransmit
state is dropped, and any scheduler cached pointers are invalidated,
making it safe to rebuild stream state during COOKIE_WAIT restart.
Updating only stream->out_curr would be insufficient, since queued
and retransmittable data would still reference the old stream state and
trigger later use-after-free in dequeue paths.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 4.15版本存在安全漏洞，该漏洞源于SCTP在处理Stale Cookie时未正确清理输出队列和无效化调度器缓存指针，可能导致释放后重用。
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-2026-52924 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2026-52924 补丁与修复 (8)
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-2026-53086 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53045 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53006 | 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-2026-52931 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53055 | 9.8 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 |
| CVE-2026-52999 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52968 | 8.8 HIGH | 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-2026-52924
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