CVE-2024-26987— 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，该漏洞源于启用hugetlb_optimize_vmemmap时出现死锁问题。
影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | a6b40850c442bf996e729e1d441d3dbc37cea171< 5ef7ba2799a3b5ed292b8f6407376e2c25ef002e |
affected |
a6b40850c442bf996e729e1d441d3dbc37cea171< 882e1180c83f5b75bae03d0ccc31ccedfe5159de |
affected | ||
a6b40850c442bf996e729e1d441d3dbc37cea171< 49955b24002dc16a0ae2e83a57a2a6c863a1845c |
affected | ||
a6b40850c442bf996e729e1d441d3dbc37cea171< 1983184c22dd84a4d95a71e5c6775c2638557dc7 |
affected | ||
5.18 |
affected | ||
< 5.18 |
unaffected | ||
6.1.88≤ 6.1.* |
unaffected | ||
6.6.29≤ 6.6.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2024-26987 基础信息
漏洞信息
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Vulnerability Title
mm/memory-failure: fix deadlock when hugetlb_optimize_vmemmap is enabled
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mm/memory-failure: fix deadlock when hugetlb_optimize_vmemmap is enabled
When I did hard offline test with hugetlb pages, below deadlock occurs:
======================================================
WARNING: possible circular locking dependency detected
6.8.0-11409-gf6cef5f8c37f #1 Not tainted
------------------------------------------------------
bash/46904 is trying to acquire lock:
ffffffffabe68910 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_slow_dec+0x16/0x60
but task is already holding lock:
ffffffffabf92ea8 (pcp_batch_high_lock){+.+.}-{3:3}, at: zone_pcp_disable+0x16/0x40
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (pcp_batch_high_lock){+.+.}-{3:3}:
__mutex_lock+0x6c/0x770
page_alloc_cpu_online+0x3c/0x70
cpuhp_invoke_callback+0x397/0x5f0
__cpuhp_invoke_callback_range+0x71/0xe0
_cpu_up+0xeb/0x210
cpu_up+0x91/0xe0
cpuhp_bringup_mask+0x49/0xb0
bringup_nonboot_cpus+0xb7/0xe0
smp_init+0x25/0xa0
kernel_init_freeable+0x15f/0x3e0
kernel_init+0x15/0x1b0
ret_from_fork+0x2f/0x50
ret_from_fork_asm+0x1a/0x30
-> #0 (cpu_hotplug_lock){++++}-{0:0}:
__lock_acquire+0x1298/0x1cd0
lock_acquire+0xc0/0x2b0
cpus_read_lock+0x2a/0xc0
static_key_slow_dec+0x16/0x60
__hugetlb_vmemmap_restore_folio+0x1b9/0x200
dissolve_free_huge_page+0x211/0x260
__page_handle_poison+0x45/0xc0
memory_failure+0x65e/0xc70
hard_offline_page_store+0x55/0xa0
kernfs_fop_write_iter+0x12c/0x1d0
vfs_write+0x387/0x550
ksys_write+0x64/0xe0
do_syscall_64+0xca/0x1e0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(pcp_batch_high_lock);
lock(cpu_hotplug_lock);
lock(pcp_batch_high_lock);
rlock(cpu_hotplug_lock);
*** DEADLOCK ***
5 locks held by bash/46904:
#0: ffff98f6c3bb23f0 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x64/0xe0
#1: ffff98f6c328e488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0xf8/0x1d0
#2: ffff98ef83b31890 (kn->active#113){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x100/0x1d0
#3: ffffffffabf9db48 (mf_mutex){+.+.}-{3:3}, at: memory_failure+0x44/0xc70
#4: ffffffffabf92ea8 (pcp_batch_high_lock){+.+.}-{3:3}, at: zone_pcp_disable+0x16/0x40
stack backtrace:
CPU: 10 PID: 46904 Comm: bash Kdump: loaded Not tainted 6.8.0-11409-gf6cef5f8c37f #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x68/0xa0
check_noncircular+0x129/0x140
__lock_acquire+0x1298/0x1cd0
lock_acquire+0xc0/0x2b0
cpus_read_lock+0x2a/0xc0
static_key_slow_dec+0x16/0x60
__hugetlb_vmemmap_restore_folio+0x1b9/0x200
dissolve_free_huge_page+0x211/0x260
__page_handle_poison+0x45/0xc0
memory_failure+0x65e/0xc70
hard_offline_page_store+0x55/0xa0
kernfs_fop_write_iter+0x12c/0x1d0
vfs_write+0x387/0x550
ksys_write+0x64/0xe0
do_syscall_64+0xca/0x1e0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc862314887
Code: 10 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:00007fff19311268 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007fc862314887
RDX: 000000000000000c RSI: 000056405645fe10 RDI: 0000000000000001
RBP: 000056405645fe10 R08: 00007fc8623d1460 R09: 000000007fffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000c
R13: 00007fc86241b780 R14: 00007fc862417600 R15: 00007fc862416a00
In short, below scene breaks the
---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，该漏洞源于启用hugetlb_optimize_vmemmap时出现死锁问题。
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-2024-26987 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-26987 补丁与修复 (1)
CVE-2024-26987 邮件列表归档 (3)
CVE-2024-26987 其他参考 (3)
同批安全公告 · Linux · 2024-05-01 · 共 159 条
| CVE-2024-27388 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-26953 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-26931 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26990 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27053 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26952 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27018 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26936 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26980 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26954 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26994 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26966 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26974 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26976 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27062 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27061 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26983 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27058 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27056 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27017 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 159 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-26987
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