CVE-2024-26923— 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，该漏洞源于垃圾收集器与connect函数之前存在竞争。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< a36ae0ec2353015f0f6762e59f4c2dbc0c906423 |
affected |
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< 343c5372d5e17b306db5f8f3c895539b06e3177f |
affected | ||
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< 2e2a03787f4f0abc0072350654ab0ef3324d9db3 |
affected | ||
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< e76c2678228f6aec74b305ae30c9374cc2f28a51 |
affected | ||
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< b75722be422c276b699200de90527d01c602ea7c |
affected | ||
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< 507cc232ffe53a352847893f8177d276c3b532a9 |
affected | ||
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< dbdf7bec5c920200077d693193f989cb1513f009 |
affected | ||
1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9< 47d8ac011fe1c9251070e1bd64cb10b48193ec51 |
affected | ||
| … +10 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2024-26923 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！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
af_unix: Fix garbage collector racing against connect()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
af_unix: Fix garbage collector racing against connect()
Garbage collector does not take into account the risk of embryo getting
enqueued during the garbage collection. If such embryo has a peer that
carries SCM_RIGHTS, two consecutive passes of scan_children() may see a
different set of children. Leading to an incorrectly elevated inflight
count, and then a dangling pointer within the gc_inflight_list.
sockets are AF_UNIX/SOCK_STREAM
S is an unconnected socket
L is a listening in-flight socket bound to addr, not in fdtable
V's fd will be passed via sendmsg(), gets inflight count bumped
connect(S, addr) sendmsg(S, [V]); close(V) __unix_gc()
---------------- ------------------------- -----------
NS = unix_create1()
skb1 = sock_wmalloc(NS)
L = unix_find_other(addr)
unix_state_lock(L)
unix_peer(S) = NS
// V count=1 inflight=0
NS = unix_peer(S)
skb2 = sock_alloc()
skb_queue_tail(NS, skb2[V])
// V became in-flight
// V count=2 inflight=1
close(V)
// V count=1 inflight=1
// GC candidate condition met
for u in gc_inflight_list:
if (total_refs == inflight_refs)
add u to gc_candidates
// gc_candidates={L, V}
for u in gc_candidates:
scan_children(u, dec_inflight)
// embryo (skb1) was not
// reachable from L yet, so V's
// inflight remains unchanged
__skb_queue_tail(L, skb1)
unix_state_unlock(L)
for u in gc_candidates:
if (u.inflight)
scan_children(u, inc_inflight_move_tail)
// V count=1 inflight=2 (!)
If there is a GC-candidate listening socket, lock/unlock its state. This
makes GC wait until the end of any ongoing connect() to that socket. After
flipping the lock, a possibly SCM-laden embryo is already enqueued. And if
there is another embryo coming, it can not possibly carry SCM_RIGHTS. At
this point, unix_inflight() can not happen because unix_gc_lock is already
taken. Inflight graph remains unaffected.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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，该漏洞源于垃圾收集器与connect函数之前存在竞争。
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-2024-26923 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2024-26923 的情报信息
请登录查看更多情报信息。
CVE-2024-26923 邮件列表归档 (2)
CVE-2024-26923 其他参考 (7)
同批安全公告 · Linux · 2024-04-24 · 共 4 条
| CVE-2024-26926 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26925 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26924 | 7.8 HIGH | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2024-26923
暂无评论