CVE-2022-48734— 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 btrfs 模块配额禁用和 qgroup 重新扫描工作器之间的死锁。
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 | 967ef5131e42d6e3bb216c44161d893048a49957< 26b3901d20bf9da2c6a00cb1fb48932166f80a45 |
affected |
967ef5131e42d6e3bb216c44161d893048a49957< 32747e01436aac8ef93fe85b5b523b4f3b52f040 |
affected | ||
967ef5131e42d6e3bb216c44161d893048a49957< 89d4cca583fc9594ee7d1a0bc986886d6fb587e6 |
affected | ||
967ef5131e42d6e3bb216c44161d893048a49957< 31198e58c09e21d4f65c49d2361f76b87aca4c3f |
affected | ||
967ef5131e42d6e3bb216c44161d893048a49957< e804861bd4e69cc5fe1053eedcb024982dde8e48 |
affected | ||
4.4 |
affected | ||
< 4.4 |
unaffected | ||
5.4.178≤ 5.4.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2022-48734 基础信息
漏洞信息
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Vulnerability Title
btrfs: fix deadlock between quota disable and qgroup rescan worker
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix deadlock between quota disable and qgroup rescan worker
Quota disable ioctl starts a transaction before waiting for the qgroup
rescan worker completes. However, this wait can be infinite and results
in deadlock because of circular dependency among the quota disable
ioctl, the qgroup rescan worker and the other task with transaction such
as block group relocation task.
The deadlock happens with the steps following:
1) Task A calls ioctl to disable quota. It starts a transaction and
waits for qgroup rescan worker completes.
2) Task B such as block group relocation task starts a transaction and
joins to the transaction that task A started. Then task B commits to
the transaction. In this commit, task B waits for a commit by task A.
3) Task C as the qgroup rescan worker starts its job and starts a
transaction. In this transaction start, task C waits for completion
of the transaction that task A started and task B committed.
This deadlock was found with fstests test case btrfs/115 and a zoned
null_blk device. The test case enables and disables quota, and the
block group reclaim was triggered during the quota disable by chance.
The deadlock was also observed by running quota enable and disable in
parallel with 'btrfs balance' command on regular null_blk devices.
An example report of the deadlock:
[372.469894] INFO: task kworker/u16:6:103 blocked for more than 122 seconds.
[372.479944] Not tainted 5.16.0-rc8 #7
[372.485067] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[372.493898] task:kworker/u16:6 state:D stack: 0 pid: 103 ppid: 2 flags:0x00004000
[372.503285] Workqueue: btrfs-qgroup-rescan btrfs_work_helper [btrfs]
[372.510782] Call Trace:
[372.514092] <TASK>
[372.521684] __schedule+0xb56/0x4850
[372.530104] ? io_schedule_timeout+0x190/0x190
[372.538842] ? lockdep_hardirqs_on+0x7e/0x100
[372.547092] ? _raw_spin_unlock_irqrestore+0x3e/0x60
[372.555591] schedule+0xe0/0x270
[372.561894] btrfs_commit_transaction+0x18bb/0x2610 [btrfs]
[372.570506] ? btrfs_apply_pending_changes+0x50/0x50 [btrfs]
[372.578875] ? free_unref_page+0x3f2/0x650
[372.585484] ? finish_wait+0x270/0x270
[372.591594] ? release_extent_buffer+0x224/0x420 [btrfs]
[372.599264] btrfs_qgroup_rescan_worker+0xc13/0x10c0 [btrfs]
[372.607157] ? lock_release+0x3a9/0x6d0
[372.613054] ? btrfs_qgroup_account_extent+0xda0/0xda0 [btrfs]
[372.620960] ? do_raw_spin_lock+0x11e/0x250
[372.627137] ? rwlock_bug.part.0+0x90/0x90
[372.633215] ? lock_is_held_type+0xe4/0x140
[372.639404] btrfs_work_helper+0x1ae/0xa90 [btrfs]
[372.646268] process_one_work+0x7e9/0x1320
[372.652321] ? lock_release+0x6d0/0x6d0
[372.658081] ? pwq_dec_nr_in_flight+0x230/0x230
[372.664513] ? rwlock_bug.part.0+0x90/0x90
[372.670529] worker_thread+0x59e/0xf90
[372.676172] ? process_one_work+0x1320/0x1320
[372.682440] kthread+0x3b9/0x490
[372.687550] ? _raw_spin_unlock_irq+0x24/0x50
[372.693811] ? set_kthread_struct+0x100/0x100
[372.700052] ret_from_fork+0x22/0x30
[372.705517] </TASK>
[372.709747] INFO: task btrfs-transacti:2347 blocked for more than 123 seconds.
[372.729827] Not tainted 5.16.0-rc8 #7
[372.745907] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[372.767106] task:btrfs-transacti state:D stack: 0 pid: 2347 ppid: 2 flags:0x00004000
[372.787776] Call Trace:
[372.801652] <TASK>
[372.812961] __schedule+0xb56/0x4850
[372.830011] ? io_schedule_timeout+0x190/0x190
[372.852547] ? lockdep_hardirqs_on+0x7e/0x100
[372.871761] ? _raw_spin_unlock_irqrestore+0x3e/0x60
[372.886792] schedule+0xe0/0x270
[372.901685] wait_current_trans+0x22c/0x310 [btrfs]
[372.919743] ? btrfs_put_transaction+0x3d0/0x3d0 [btrfs]
[372.938923] ? finish_wait+0x270/0x270
[372.959085] ? join_transaction+0xc7
---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 btrfs 模块配额禁用和 qgroup 重新扫描工作器之间的死锁。
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-2022-48734 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48734 其他参考 (5)
同批安全公告 · Linux · 2024-06-20 · 共 67 条
| CVE-2022-48711 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-38620 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47620 | 8.1 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48743 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48720 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48716 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48771 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48751 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48742 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48754 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48733 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48721 | 7.8 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48762 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48726 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48735 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48729 | 7.8 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48759 | 7.8 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48744 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48727 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48739 | 7.1 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 67 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-48734
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