CVE-2025-68774— 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__hfs_bnode_create()中缺少hfs_bnode_get()调用，可能导致节点引用计数错误。
影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3b0fc7af50b896d0f3d104e70787ba1973bc0b56 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 39e149d58ef4d7883cbf87448d39d51292fd342d |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b68dc4134b18a3922cd33439ec614aad4172bc86 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b9d1c6bb5f19460074ce9862cb80be86b5fb0a50 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 457f795e7abd7770de10216d7f9994a3f12a56d6 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5882e7c8cdbb5e254a69628b780acff89c78071e |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 152af114287851583cf7e0abc10129941f19466a |
affected | ||
2.6.12 |
affected | ||
| … +8 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2025-68774 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！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
hfsplus: fix missing hfs_bnode_get() in __hfs_bnode_create
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
hfsplus: fix missing hfs_bnode_get() in __hfs_bnode_create
When sync() and link() are called concurrently, both threads may
enter hfs_bnode_find() without finding the node in the hash table
and proceed to create it.
Thread A:
hfsplus_write_inode()
-> hfsplus_write_system_inode()
-> hfs_btree_write()
-> hfs_bnode_find(tree, 0)
-> __hfs_bnode_create(tree, 0)
Thread B:
hfsplus_create_cat()
-> hfs_brec_insert()
-> hfs_bnode_split()
-> hfs_bmap_alloc()
-> hfs_bnode_find(tree, 0)
-> __hfs_bnode_create(tree, 0)
In this case, thread A creates the bnode, sets refcnt=1, and hashes it.
Thread B also tries to create the same bnode, notices it has already
been inserted, drops its own instance, and uses the hashed one without
getting the node.
```
node2 = hfs_bnode_findhash(tree, cnid);
if (!node2) { <- Thread A
hash = hfs_bnode_hash(cnid);
node->next_hash = tree->node_hash[hash];
tree->node_hash[hash] = node;
tree->node_hash_cnt++;
} else { <- Thread B
spin_unlock(&tree->hash_lock);
kfree(node);
wait_event(node2->lock_wq,
!test_bit(HFS_BNODE_NEW, &node2->flags));
return node2;
}
```
However, hfs_bnode_find() requires each call to take a reference.
Here both threads end up setting refcnt=1. When they later put the node,
this triggers:
BUG_ON(!atomic_read(&node->refcnt))
In this scenario, Thread B in fact finds the node in the hash table
rather than creating a new one, and thus must take a reference.
Fix this by calling hfs_bnode_get() when reusing a bnode newly created by
another thread to ensure the refcount is updated correctly.
A similar bug was fixed in HFS long ago in commit
a9dc087fd3c4 ("fix missing hfs_bnode_get() in __hfs_bnode_create")
but the same issue remained in HFS+ until now.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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__hfs_bnode_create()中缺少hfs_bnode_get()调用，可能导致节点引用计数错误。
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-2025-68774 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2025-68774 的情报信息
请登录查看更多情报信息。
同批安全公告 · Linux · 2026-01-13 · 共 93 条
| CVE-2025-68811 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68794 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71068 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68775 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68817 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68809 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71095 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71093 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68818 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71072 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68799 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68803 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71078 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68793 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68808 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68810 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71082 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68819 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68795 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71074 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 93 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-68774
暂无评论