CVE-2024-36938— 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 bpf,skmsg 模块 sk_psock_skb_ingress_enqueue 中的空指针取消引用。
影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 604326b41a6fb9b4a78b6179335decee0365cd8c< c0809c128dad4c3413818384eb06a341633db973 |
affected |
604326b41a6fb9b4a78b6179335decee0365cd8c< 5965bc7535fb87510b724e5465ccc1a1cf00916d |
affected | ||
604326b41a6fb9b4a78b6179335decee0365cd8c< 39dc9e1442385d6e9be0b6491ee488dddd55ae27 |
affected | ||
604326b41a6fb9b4a78b6179335decee0365cd8c< b397a0ab8582c533ec0c6b732392f141fc364f87 |
affected | ||
604326b41a6fb9b4a78b6179335decee0365cd8c< 772d5729b5ff0df0d37b32db600ce635b2172f80 |
affected | ||
604326b41a6fb9b4a78b6179335decee0365cd8c< 6648e613226e18897231ab5e42ffc29e63fa3365 |
affected | ||
4.20 |
affected | ||
< 4.20 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2024-36938 基础信息
漏洞信息
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Vulnerability Title
bpf, skmsg: Fix NULL pointer dereference in sk_psock_skb_ingress_enqueue
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
bpf, skmsg: Fix NULL pointer dereference in sk_psock_skb_ingress_enqueue
Fix NULL pointer data-races in sk_psock_skb_ingress_enqueue() which
syzbot reported [1].
[1]
BUG: KCSAN: data-race in sk_psock_drop / sk_psock_skb_ingress_enqueue
write to 0xffff88814b3278b8 of 8 bytes by task 10724 on cpu 1:
sk_psock_stop_verdict net/core/skmsg.c:1257 [inline]
sk_psock_drop+0x13e/0x1f0 net/core/skmsg.c:843
sk_psock_put include/linux/skmsg.h:459 [inline]
sock_map_close+0x1a7/0x260 net/core/sock_map.c:1648
unix_release+0x4b/0x80 net/unix/af_unix.c:1048
__sock_release net/socket.c:659 [inline]
sock_close+0x68/0x150 net/socket.c:1421
__fput+0x2c1/0x660 fs/file_table.c:422
__fput_sync+0x44/0x60 fs/file_table.c:507
__do_sys_close fs/open.c:1556 [inline]
__se_sys_close+0x101/0x1b0 fs/open.c:1541
__x64_sys_close+0x1f/0x30 fs/open.c:1541
do_syscall_64+0xd3/0x1d0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
read to 0xffff88814b3278b8 of 8 bytes by task 10713 on cpu 0:
sk_psock_data_ready include/linux/skmsg.h:464 [inline]
sk_psock_skb_ingress_enqueue+0x32d/0x390 net/core/skmsg.c:555
sk_psock_skb_ingress_self+0x185/0x1e0 net/core/skmsg.c:606
sk_psock_verdict_apply net/core/skmsg.c:1008 [inline]
sk_psock_verdict_recv+0x3e4/0x4a0 net/core/skmsg.c:1202
unix_read_skb net/unix/af_unix.c:2546 [inline]
unix_stream_read_skb+0x9e/0xf0 net/unix/af_unix.c:2682
sk_psock_verdict_data_ready+0x77/0x220 net/core/skmsg.c:1223
unix_stream_sendmsg+0x527/0x860 net/unix/af_unix.c:2339
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x140/0x180 net/socket.c:745
____sys_sendmsg+0x312/0x410 net/socket.c:2584
___sys_sendmsg net/socket.c:2638 [inline]
__sys_sendmsg+0x1e9/0x280 net/socket.c:2667
__do_sys_sendmsg net/socket.c:2676 [inline]
__se_sys_sendmsg net/socket.c:2674 [inline]
__x64_sys_sendmsg+0x46/0x50 net/socket.c:2674
do_syscall_64+0xd3/0x1d0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
value changed: 0xffffffff83d7feb0 -> 0x0000000000000000
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10713 Comm: syz-executor.4 Tainted: G W 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Prior to this, commit 4cd12c6065df ("bpf, sockmap: Fix NULL pointer
dereference in sk_psock_verdict_data_ready()") fixed one NULL pointer
similarly due to no protection of saved_data_ready. Here is another
different caller causing the same issue because of the same reason. So
we should protect it with sk_callback_lock read lock because the writer
side in the sk_psock_drop() uses "write_lock_bh(&sk->sk_callback_lock);".
To avoid errors that could happen in future, I move those two pairs of
lock into the sk_psock_data_ready(), which is suggested by John Fastabend.
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 bpf,skmsg 模块 sk_psock_skb_ingress_enqueue 中的空指针取消引用。
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-2024-36938 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-36938 其他参考 (6)
同批安全公告 · Linux · 2024-05-30 · 共 93 条
| CVE-2024-36958 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36886 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36911 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36912 | 9.6 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36913 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36909 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36922 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36921 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36910 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36032 | 8.1 HIGH | Linux kernel安全漏洞 |
| CVE-2024-36933 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36904 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36914 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36918 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36018 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36894 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36890 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36940 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36928 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36884 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 93 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-36938
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