CVE-2024-50126— 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net模块中，taprio_dump函数中可能的悬空指针使用，通过添加RCU读取侧临界区来修复，该问题在arm64系统上被发现。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 18cdd2f0998a4967b1fff4c43ed9aef049e42c39< b911fa9e92ee586e36479ad57b88f20471acaca1 |
affected |
18cdd2f0998a4967b1fff4c43ed9aef049e42c39< 5d282467245f267c0b9ada3f7f309ff838521536 |
affected | ||
18cdd2f0998a4967b1fff4c43ed9aef049e42c39< e4369cb6acf6b895ac2453cc1cdf2f4326122c6d |
affected | ||
18cdd2f0998a4967b1fff4c43ed9aef049e42c39< b22db8b8befe90b61c98626ca1a2fbb0505e9fe3 |
affected | ||
6.1 |
affected | ||
< 6.1 |
unaffected | ||
6.1.117≤ 6.1.* |
unaffected | ||
6.6.59≤ 6.6.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2024-50126 基础信息
漏洞信息
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Vulnerability Title
net: sched: use RCU read-side critical section in taprio_dump()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: sched: use RCU read-side critical section in taprio_dump()
Fix possible use-after-free in 'taprio_dump()' by adding RCU
read-side critical section there. Never seen on x86 but
found on a KASAN-enabled arm64 system when investigating
https://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa:
[T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0
[T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862
[T15862]
[T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2
[T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024
[T15862] Call trace:
[T15862] dump_backtrace+0x20c/0x220
[T15862] show_stack+0x2c/0x40
[T15862] dump_stack_lvl+0xf8/0x174
[T15862] print_report+0x170/0x4d8
[T15862] kasan_report+0xb8/0x1d4
[T15862] __asan_report_load4_noabort+0x20/0x2c
[T15862] taprio_dump+0xa0c/0xbb0
[T15862] tc_fill_qdisc+0x540/0x1020
[T15862] qdisc_notify.isra.0+0x330/0x3a0
[T15862] tc_modify_qdisc+0x7b8/0x1838
[T15862] rtnetlink_rcv_msg+0x3c8/0xc20
[T15862] netlink_rcv_skb+0x1f8/0x3d4
[T15862] rtnetlink_rcv+0x28/0x40
[T15862] netlink_unicast+0x51c/0x790
[T15862] netlink_sendmsg+0x79c/0xc20
[T15862] __sock_sendmsg+0xe0/0x1a0
[T15862] ____sys_sendmsg+0x6c0/0x840
[T15862] ___sys_sendmsg+0x1ac/0x1f0
[T15862] __sys_sendmsg+0x110/0x1d0
[T15862] __arm64_sys_sendmsg+0x74/0xb0
[T15862] invoke_syscall+0x88/0x2e0
[T15862] el0_svc_common.constprop.0+0xe4/0x2a0
[T15862] do_el0_svc+0x44/0x60
[T15862] el0_svc+0x50/0x184
[T15862] el0t_64_sync_handler+0x120/0x12c
[T15862] el0t_64_sync+0x190/0x194
[T15862]
[T15862] Allocated by task 15857:
[T15862] kasan_save_stack+0x3c/0x70
[T15862] kasan_save_track+0x20/0x3c
[T15862] kasan_save_alloc_info+0x40/0x60
[T15862] __kasan_kmalloc+0xd4/0xe0
[T15862] __kmalloc_cache_noprof+0x194/0x334
[T15862] taprio_change+0x45c/0x2fe0
[T15862] tc_modify_qdisc+0x6a8/0x1838
[T15862] rtnetlink_rcv_msg+0x3c8/0xc20
[T15862] netlink_rcv_skb+0x1f8/0x3d4
[T15862] rtnetlink_rcv+0x28/0x40
[T15862] netlink_unicast+0x51c/0x790
[T15862] netlink_sendmsg+0x79c/0xc20
[T15862] __sock_sendmsg+0xe0/0x1a0
[T15862] ____sys_sendmsg+0x6c0/0x840
[T15862] ___sys_sendmsg+0x1ac/0x1f0
[T15862] __sys_sendmsg+0x110/0x1d0
[T15862] __arm64_sys_sendmsg+0x74/0xb0
[T15862] invoke_syscall+0x88/0x2e0
[T15862] el0_svc_common.constprop.0+0xe4/0x2a0
[T15862] do_el0_svc+0x44/0x60
[T15862] el0_svc+0x50/0x184
[T15862] el0t_64_sync_handler+0x120/0x12c
[T15862] el0t_64_sync+0x190/0x194
[T15862]
[T15862] Freed by task 6192:
[T15862] kasan_save_stack+0x3c/0x70
[T15862] kasan_save_track+0x20/0x3c
[T15862] kasan_save_free_info+0x4c/0x80
[T15862] poison_slab_object+0x110/0x160
[T15862] __kasan_slab_free+0x3c/0x74
[T15862] kfree+0x134/0x3c0
[T15862] taprio_free_sched_cb+0x18c/0x220
[T15862] rcu_core+0x920/0x1b7c
[T15862] rcu_core_si+0x10/0x1c
[T15862] handle_softirqs+0x2e8/0xd64
[T15862] __do_softirq+0x14/0x20
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net模块中，taprio_dump函数中可能的悬空指针使用，通过添加RCU读取侧临界区来修复，该问题在arm64系统上被发现。
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-2024-50126 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-50126 补丁与修复 (3)
同批安全公告 · Linux · 2024-11-05 · 共 50 条
| CVE-2024-50106 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-50113 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50115 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50125 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50124 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50132 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52920 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50091 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50101 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50114 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50127 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50128 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50130 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50090 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50094 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50095 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50099 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50096 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50131 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50117 | 7.3 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 50 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-50126
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