CVE-2024-26805— 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 netlink skb_datagram_iter 中存在安全问题。
影响版本矩阵 28
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1853c949646005b5959c483becde86608f548f24< ec343a55b687a452f5e87f3b52bf9f155864df65 |
affected |
1853c949646005b5959c483becde86608f548f24< 9ae51361da43270f4ba0eb924427a07e87e48777 |
affected | ||
1853c949646005b5959c483becde86608f548f24< f19d1f98e60e68b11fc60839105dd02a30ec0d77 |
affected | ||
1853c949646005b5959c483becde86608f548f24< c71ed29d15b1a1ed6c464f8c3536996963046285 |
affected | ||
1853c949646005b5959c483becde86608f548f24< 0b27bf4c494d61e5663baa34c3edd7ccebf0ea44 |
affected | ||
1853c949646005b5959c483becde86608f548f24< d3ada42e534a83b618bbc1e490d23bf0fdae4736 |
affected | ||
1853c949646005b5959c483becde86608f548f24< 59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d |
affected | ||
1853c949646005b5959c483becde86608f548f24< 661779e1fcafe1b74b3f3fe8e980c1e207fea1fd |
affected | ||
| … +20 条更多 | |||
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一、 漏洞 CVE-2024-26805 基础信息
漏洞信息
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Vulnerability Title
netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
syzbot reported the following uninit-value access issue [1]:
netlink_to_full_skb() creates a new `skb` and puts the `skb->data`
passed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data
size is specified as `len` and passed to skb_put_data(). This `len`
is based on `skb->end` that is not data offset but buffer offset. The
`skb->end` contains data and tailroom. Since the tailroom is not
initialized when the new `skb` created, KMSAN detects uninitialized
memory area when copying the data.
This patch resolved this issue by correct the len from `skb->end` to
`skb->len`, which is the actual data offset.
BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]
BUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline]
BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline]
BUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186
instrument_copy_to_user include/linux/instrumented.h:114 [inline]
copy_to_user_iter lib/iov_iter.c:24 [inline]
iterate_ubuf include/linux/iov_iter.h:29 [inline]
iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
iterate_and_advance include/linux/iov_iter.h:271 [inline]
_copy_to_iter+0x364/0x2520 lib/iov_iter.c:186
copy_to_iter include/linux/uio.h:197 [inline]
simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532
__skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420
skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546
skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]
packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482
sock_recvmsg_nosec net/socket.c:1044 [inline]
sock_recvmsg net/socket.c:1066 [inline]
sock_read_iter+0x467/0x580 net/socket.c:1136
call_read_iter include/linux/fs.h:2014 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x8f6/0xe00 fs/read_write.c:470
ksys_read+0x20f/0x4c0 fs/read_write.c:613
__do_sys_read fs/read_write.c:623 [inline]
__se_sys_read fs/read_write.c:621 [inline]
__x64_sys_read+0x93/0xd0 fs/read_write.c:621
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Uninit was stored to memory at:
skb_put_data include/linux/skbuff.h:2622 [inline]
netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]
__netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]
__netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325
netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]
netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]
netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368
netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638
__sys_sendmsg net/socket.c:2667 [inline]
__do_sys_sendmsg net/socket.c:2676 [inline]
__se_sys_sendmsg net/socket.c:2674 [inline]
__x64_sys_sendmsg+0x307/0x490 net/socket.c:2674
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Uninit was created at:
free_pages_prepare mm/page_alloc.c:1087 [inline]
free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347
free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533
release_pages+0x23d3/0x2410 mm/swap.c:1042
free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316
tlb_batch_pages
---truncated---
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 netlink skb_datagram_iter 中存在安全问题。
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-2024-26805 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-26805 邮件列表归档 (2)
CVE-2024-26805 其他参考 (8)
同批安全公告 · Linux · 2024-04-04 · 共 32 条
| CVE-2024-26782 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-26800 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-26801 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26792 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26809 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26808 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26807 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26804 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26802 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26797 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26795 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26793 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26789 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26786 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26799 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26746 | Linux kernel 安全漏洞 | |
| CVE-2024-26750 | Linux kernel 安全漏洞 | |
| CVE-2024-26780 | Linux kernel 安全漏洞 | |
| CVE-2024-26806 | Linux kernel 安全漏洞 | |
| CVE-2024-26781 | Linux kernel 安全漏洞 |
显示前 20 条，共 32 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-26805
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