CVE-2024-26962— 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io 与 reshape 并发时 dm-raid456 会出现死锁。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c467e97f079f0019870c314996fae952cc768e82< 5943a34bf6bab5801e08a55f63e1b8d5bc90dae1 |
affected |
c467e97f079f0019870c314996fae952cc768e82< a8d249d770cb357d16a2097b548d2e4c1c137304 |
affected | ||
c467e97f079f0019870c314996fae952cc768e82< 41425f96d7aa59bc865f60f5dda3d7697b555677 |
affected | ||
515d971cd26a40f710490d1566783f9c62b46d61 |
affected | ||
4ce431c297558e30baa9226243a15d818320742b |
affected | ||
6.1.68< 6.2 |
affected | ||
6.6.7< 6.7 |
affected | ||
6.7 |
affected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2024-26962 基础信息
漏洞信息
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Vulnerability Title
dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape
For raid456, if reshape is still in progress, then IO across reshape
position will wait for reshape to make progress. However, for dm-raid,
in following cases reshape will never make progress hence IO will hang:
1) the array is read-only;
2) MD_RECOVERY_WAIT is set;
3) MD_RECOVERY_FROZEN is set;
After commit c467e97f079f ("md/raid6: use valid sector values to determine
if an I/O should wait on the reshape") fix the problem that IO across
reshape position doesn't wait for reshape, the dm-raid test
shell/lvconvert-raid-reshape.sh start to hang:
[root@fedora ~]# cat /proc/979/stack
[<0>] wait_woken+0x7d/0x90
[<0>] raid5_make_request+0x929/0x1d70 [raid456]
[<0>] md_handle_request+0xc2/0x3b0 [md_mod]
[<0>] raid_map+0x2c/0x50 [dm_raid]
[<0>] __map_bio+0x251/0x380 [dm_mod]
[<0>] dm_submit_bio+0x1f0/0x760 [dm_mod]
[<0>] __submit_bio+0xc2/0x1c0
[<0>] submit_bio_noacct_nocheck+0x17f/0x450
[<0>] submit_bio_noacct+0x2bc/0x780
[<0>] submit_bio+0x70/0xc0
[<0>] mpage_readahead+0x169/0x1f0
[<0>] blkdev_readahead+0x18/0x30
[<0>] read_pages+0x7c/0x3b0
[<0>] page_cache_ra_unbounded+0x1ab/0x280
[<0>] force_page_cache_ra+0x9e/0x130
[<0>] page_cache_sync_ra+0x3b/0x110
[<0>] filemap_get_pages+0x143/0xa30
[<0>] filemap_read+0xdc/0x4b0
[<0>] blkdev_read_iter+0x75/0x200
[<0>] vfs_read+0x272/0x460
[<0>] ksys_read+0x7a/0x170
[<0>] __x64_sys_read+0x1c/0x30
[<0>] do_syscall_64+0xc6/0x230
[<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74
This is because reshape can't make progress.
For md/raid, the problem doesn't exist because register new sync_thread
doesn't rely on the IO to be done any more:
1) If array is read-only, it can switch to read-write by ioctl/sysfs;
2) md/raid never set MD_RECOVERY_WAIT;
3) If MD_RECOVERY_FROZEN is set, mddev_suspend() doesn't hold
'reconfig_mutex', hence it can be cleared and reshape can continue by
sysfs api 'sync_action'.
However, I'm not sure yet how to avoid the problem in dm-raid yet. This
patch on the one hand make sure raid_message() can't change
sync_thread() through raid_message() after presuspend(), on the other
hand detect the above 3 cases before wait for IO do be done in
dm_suspend(), and let dm-raid requeue those IO.
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io 与 reshape 并发时 dm-raid456 会出现死锁。
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-2024-26962 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-26962 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-2024-26936 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-27018 | 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 → →
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V. Comments for CVE-2024-26962
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