CVE-2025-38496

一、漏洞信息
 漏洞编号：[CVE-2025-38496](https://nvd.nist.gov/vuln/detail/CVE-2025-38496)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：N/A None
  Vector：CVSS：3.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:dm-bufio: fix sched in atomic contextIf  try_verify_in_tasklet  is set for dm-verity, DM_BUFIO_CLIENT_NO_SLEEPis enabled for dm-bufio. However, when bufio tries to evict buffers, thereis a chance to trigger scheduling in spin_lock_bh, the following warningis hit:BUG: sleeping function called from invalid context at drivers/md/dm-bufio.c:2745in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 123, name: kworker/2:2preempt_count: 201, expected: 0RCU nest depth: 0, expected: 04 locks held by kworker/2:2/123: #0: ffff88800a2d1548 ((wq_completion)dm_bufio_cache){....}-{0:0}, at: process_one_work+0xe46/0x1970 #1: ffffc90000d97d20 ((work_completion)(&dm_bufio_replacement_work)){....}-{0:0}, at: process_one_work+0x763/0x1970 #2: ffffffff8555b528 (dm_bufio_clients_lock){....}-{3:3}, at: do_global_cleanup+0x1ce/0x710 #3: ffff88801d5820b8 (&c->spinlock){....}-{2:2}, at: do_global_cleanup+0x2a5/0x710Preemption disabled at:[<0000000000000000>] 0x0CPU: 2 UID: 0 PID: 123 Comm: kworker/2:2 Not tainted 6.16.0-rc3-g90548c634bd0 #305 PREEMPT(voluntary)Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014Workqueue: dm_bufio_cache do_global_cleanupCall Trace: <TASK> dump_stack_lvl+0x53/0x70 __might_resched+0x360/0x4e0 do_global_cleanup+0x2f5/0x710 process_one_work+0x7db/0x1970 worker_thread+0x518/0xea0 kthread+0x359/0x690 ret_from_fork+0xf3/0x1b0 ret_from_fork_asm+0x1a/0x30 </TASK>That can be reproduced by:  veritysetup format --data-block-size=4096 --hash-block-size=4096 /dev/vda /dev/vdb  SIZE=$(blockdev --getsz /dev/vda)  dmsetup create myverity -r --table  0 $SIZE verity 1 /dev/vda /dev/vdb 4096 4096 <data_blocks> 1 sha256 <root_hash> <salt> 1 try_verify_in_tasklet   mount /dev/dm-0 /mnt -o ro  echo 102400 > /sys/module/dm_bufio/parameters/max_cache_size_bytes  [read files in /mnt]
 漏洞公开时间：2025-07-28 20:15:31
 漏洞创建时间：2025-07-28 20:21:57
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2025-38496
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
|  | https://git.kernel.org/stable/c/3edfdb1d4ef81320dae0caa40bc24baf8c1bbb86 |  |
|  | https://git.kernel.org/stable/c/469a39a33a9934af157299bf11c58f6e6cb53f85 |  |
|  | https://git.kernel.org/stable/c/68860d1ade385eef9fcdbf6552f061283091fdb8 |  |
|  | https://git.kernel.org/stable/c/b1bf1a782fdf5c482215c0c661b5da98b8e75773 |  |
|  | https://lore.kernel.org/linux-cve-announce/2025072818-CVE-2025-38496-4301@gregkh/T/#u |  |
|  | https://security-tracker.debian.org/tracker/CVE-2025-38496 |  |
|  | https://ubuntu.com/security/CVE-2025-38496 |  |
|  | https://www.cve.org/CVERecord?id=CVE-2025-38496 |  |
|  | https://git.kernel.org/linus/b1bf1a782fdf5c482215c0c661b5da98b8e75773 |  |
|  | https://access.redhat.com/security/cve/cve-2025-38496 |  |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  七彩瞬析开源风险感知平台
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
| gregkh/linux |  | https://github.com/gregkh/linux/commit/469a39a33a9934af157299bf11c58f6e6cb53f85.patch |  | ljqc |
|  |  | https://git.kernel.org/stable/c/3edfdb1d4ef81320dae0caa40bc24baf8c1bbb86 |  | nvd |
|  |  | https://git.kernel.org/stable/c/469a39a33a9934af157299bf11c58f6e6cb53f85 |  | nvd |
|  |  | https://git.kernel.org/stable/c/68860d1ade385eef9fcdbf6552f061283091fdb8 |  | nvd |
|  |  | https://git.kernel.org/stable/c/b1bf1a782fdf5c482215c0c661b5da98b8e75773 |  | nvd |
|  |  | https://git.kernel.org/linus/b1bf1a782fdf5c482215c0c661b5da98b8e75773 |  | osv |

</details>
 
二、漏洞分析结构反馈
 影响性分析说明：
  
 openEuler评分：
   
 受影响版本排查(受影响/不受影响)：
  1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):

修复是否涉及abi变化(是/否)：
  1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):

原因说明：
  1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):

@yangyingliang ,@jiaoff ,@guohaocs2c ,@hanjun-guo ,@woqidaideshi ,@newbeats ,@zhangyi089 ,@colyli ,@thundertown ,@htforge ,@chiqijun ,@lengchao ,@zhujianwei001 ,@kylin-mayukun ,@wangxiongfeng ,@wkfxxx ,@SuperSix173 ,@jentlestea ,@gasonchen ,@kailiu42 
**issue处理注意事项:** 
**1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;**
**2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;**
**3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否), 原因说明)不能省略,省略后cve-manager将无法正常解析填写内容.**
************************************************************************
影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响): 
1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):

原因说明：
1.master(6.12.33):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):
8.openEuler-24.03-LTS-SP2(6.6.0):

issue处理具体操作请参考: 
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

<table><tr><th white-space: nowrap;>参考网址</th> <th white-space: nowrap;>关联pr</th> <th white-space: nowrap;>状态</th> <th white-space: nowrap;>补丁链接</th></tr><tr><td rowspan="1">https://nvd.nist.gov/vuln/detail/CVE-2025-38496</td><td>None</td><td>None</td><td><a href=https://git.kernel.org/stable/c/469a39a33a9934af157299bf11c58f6e6cb53f85>https://git.kernel.org/stable/c/469a39a33a9934af157299bf11c58f6e6cb53f85</a><br /><a href=https://git.kernel.org/stable/c/68860d1ade385eef9fcdbf6552f061283091fdb8>https://git.kernel.org/stable/c/68860d1ade385eef9fcdbf6552f061283091fdb8</a><br /><a href=https://git.kernel.org/stable/c/3edfdb1d4ef81320dae0caa40bc24baf8c1bbb86>https://git.kernel.org/stable/c/3edfdb1d4ef81320dae0caa40bc24baf8c1bbb86</a><br /><a href=https://git.kernel.org/stable/c/b1bf1a782fdf5c482215c0c661b5da98b8e75773>https://git.kernel.org/stable/c/b1bf1a782fdf5c482215c0c661b5da98b8e75773</a></td></tr><tr><td rowspan="1">https://www.opencve.io/cve/CVE-2025-38496</td><td>None</td><td>None</td><td><a href=https://git.kernel.org/stable/c/469a39a33a9934af157299bf11c58f6e6cb53f85>https://git.kernel.org/stable/c/469a39a33a9934af157299bf11c58f6e6cb53f85</a><br /><a href=https://git.kernel.org/stable/c/68860d1ade385eef9fcdbf6552f061283091fdb8>https://git.kernel.org/stable/c/68860d1ade385eef9fcdbf6552f061283091fdb8</a><br /><a href=https://git.kernel.org/stable/c/3edfdb1d4ef81320dae0caa40bc24baf8c1bbb86>https://git.kernel.org/stable/c/3edfdb1d4ef81320dae0caa40bc24baf8c1bbb86</a><br /><a href=https://git.kernel.org/stable/c/b1bf1a782fdf5c482215c0c661b5da98b8e75773>https://git.kernel.org/stable/c/b1bf1a782fdf5c482215c0c661b5da98b8e75773</a></td></tr><tr><td>https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2025-38496</td><td></td><td></td><td></td></tr><tr><td>https://security-tracker.debian.org/tracker/CVE-2025-38496</td><td></td><td></td><td></td></tr><tr><td>http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2025-38496</td><td></td><td></td><td></td></tr></table>

> 说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用[CVE补丁工具](https://gitee.com/openeuler/cve-manager/blob/master/cve-agency-manager/cve_tracking/README.md)。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址 补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

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CVE-2025-38496

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