CVE-2025-21861— 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，该漏洞源于在迁移设备时将待释放的页面添加到LRU，可能导致内存损坏。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 61fa824e304ed162fe965f64999068e6fcff2059 |
affected |
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 64397b0cb7c09e3ef3f9f5c7c17299c4eebd3875 |
affected | ||
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 4f52f7c50f5b6f5eeb06823e21fe546d90f9c595 |
affected | ||
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 20fb6fc51863fbff7868de8b5f6d249d2094df1f |
affected | ||
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 78f579cb7d825134e071a1714d8d0c4fd0ffe459 |
affected | ||
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 3f9240d59e9a95d19f06120bfd1d0e681c6c0ac7 |
affected | ||
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 069dd21ea8262204f94737878389c2815a054a9e |
affected | ||
8763cb45ab967a92a5ee49e9c544c0f0ea90e2d6< 41cddf83d8b00f29fd105e7a0777366edc69a5cf |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-21861 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
If migration succeeded, we called
folio_migrate_flags()->mem_cgroup_migrate() to migrate the memcg from the
old to the new folio. This will set memcg_data of the old folio to 0.
Similarly, if migration failed, memcg_data of the dst folio is left unset.
If we call folio_putback_lru() on such folios (memcg_data == 0), we will
add the folio to be freed to the LRU, making memcg code unhappy. Running
the hmm selftests:
# ./hmm-tests
...
# RUN hmm.hmm_device_private.migrate ...
[ 102.078007][T14893] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff27d200 pfn:0x13cc00
[ 102.079974][T14893] anon flags: 0x17ff00000020018(uptodate|dirty|swapbacked|node=0|zone=2|lastcpupid=0x7ff)
[ 102.082037][T14893] raw: 017ff00000020018 dead000000000100 dead000000000122 ffff8881353896c9
[ 102.083687][T14893] raw: 00000007ff27d200 0000000000000000 00000001ffffffff 0000000000000000
[ 102.085331][T14893] page dumped because: VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled())
[ 102.087230][T14893] ------------[ cut here ]------------
[ 102.088279][T14893] WARNING: CPU: 0 PID: 14893 at ./include/linux/memcontrol.h:726 folio_lruvec_lock_irqsave+0x10e/0x170
[ 102.090478][T14893] Modules linked in:
[ 102.091244][T14893] CPU: 0 UID: 0 PID: 14893 Comm: hmm-tests Not tainted 6.13.0-09623-g6c216bc522fd #151
[ 102.093089][T14893] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014
[ 102.094848][T14893] RIP: 0010:folio_lruvec_lock_irqsave+0x10e/0x170
[ 102.096104][T14893] Code: ...
[ 102.099908][T14893] RSP: 0018:ffffc900236c37b0 EFLAGS: 00010293
[ 102.101152][T14893] RAX: 0000000000000000 RBX: ffffea0004f30000 RCX: ffffffff8183f426
[ 102.102684][T14893] RDX: ffff8881063cb880 RSI: ffffffff81b8117f RDI: ffff8881063cb880
[ 102.104227][T14893] RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
[ 102.105757][T14893] R10: 0000000000000001 R11: 0000000000000002 R12: ffffc900236c37d8
[ 102.107296][T14893] R13: ffff888277a2bcb0 R14: 000000000000001f R15: 0000000000000000
[ 102.108830][T14893] FS: 00007ff27dbdd740(0000) GS:ffff888277a00000(0000) knlGS:0000000000000000
[ 102.110643][T14893] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 102.111924][T14893] CR2: 00007ff27d400000 CR3: 000000010866e000 CR4: 0000000000750ef0
[ 102.113478][T14893] PKRU: 55555554
[ 102.114172][T14893] Call Trace:
[ 102.114805][T14893] <TASK>
[ 102.115397][T14893] ? folio_lruvec_lock_irqsave+0x10e/0x170
[ 102.116547][T14893] ? __warn.cold+0x110/0x210
[ 102.117461][T14893] ? folio_lruvec_lock_irqsave+0x10e/0x170
[ 102.118667][T14893] ? report_bug+0x1b9/0x320
[ 102.119571][T14893] ? handle_bug+0x54/0x90
[ 102.120494][T14893] ? exc_invalid_op+0x17/0x50
[ 102.121433][T14893] ? asm_exc_invalid_op+0x1a/0x20
[ 102.122435][T14893] ? __wake_up_klogd.part.0+0x76/0xd0
[ 102.123506][T14893] ? dump_page+0x4f/0x60
[ 102.124352][T14893] ? folio_lruvec_lock_irqsave+0x10e/0x170
[ 102.125500][T14893] folio_batch_move_lru+0xd4/0x200
[ 102.126577][T14893] ? __pfx_lru_add+0x10/0x10
[ 102.127505][T14893] __folio_batch_add_and_move+0x391/0x720
[ 102.128633][T14893] ? __pfx_lru_add+0x10/0x10
[ 102.129550][T14893] folio_putback_lru+0x16/0x80
[ 102.130564][T14893] migrate_device_finalize+0x9b/0x530
[ 102.131640][T14893] dmirror_migrate_to_device.constprop.0+0x7c5/0xad0
[ 102.133047][T14893] dmirror_fops_unlocked_ioctl+0x89b/0xc80
Likely, nothing else goes wrong: putting the last folio reference will
remove the folio from the LRU again. So besides memcg complaining, adding
the folio to be freed to the LRU is just an unnecessary step.
The new flow resembles what we have in migrate_folio_move(): add the dst
to the lru, rem
---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，该漏洞源于在迁移设备时将待释放的页面添加到LRU，可能导致内存损坏。
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-2025-21861 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-21861 补丁与修复 (6)
CVE-2025-21861 其他参考 (2)
同批安全公告 · Linux · 2025-03-12 · 共 26 条
| CVE-2024-58087 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21850 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21855 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21864 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-58089 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21858 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21851 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21844 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21853 | Linux kernel 安全漏洞 | |
| CVE-2024-58088 | Linux kernel 安全漏洞 | |
| CVE-2025-21845 | Linux kernel 安全漏洞 | |
| CVE-2025-21846 | Linux kernel 安全漏洞 | |
| CVE-2025-21848 | Linux kernel 安全漏洞 | |
| CVE-2025-21847 | Linux kernel 安全漏洞 | |
| CVE-2025-21849 | Linux kernel 安全漏洞 | |
| CVE-2025-21852 | Linux kernel 安全漏洞 | |
| CVE-2025-21866 | Linux kernel 安全漏洞 | |
| CVE-2025-21854 | Linux kernel 安全漏洞 | |
| CVE-2025-21856 | Linux kernel 安全漏洞 | |
| CVE-2025-21857 | Linux kernel 安全漏洞 |
显示前 20 条，共 26 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21861
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