CVE-2026-46169— 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hfsplus未验证目录记录大小，可能导致未初始化值问题。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3003dbf62d151d47a6b90f71655292a51a05f244 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8be69532e399eec9d9d990f6958b4ff2383b19b3 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3bc337697c66db2e2a4a94f0509c282c1a014b86 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 61a790974ff7e533acbceca06c7d02f22bf96d4d |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c91bbd6193c70a02c50c22e0fb1f60c3c5bd053a |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a420904450962a562ad053a41a53a27755021b48 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 93e8d613f1a01b6637f387cc93f184cf7fb881d6 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b6b592275aeff184aa82fcf6abccd833fb71b393 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-46169 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
hfsplus: fix uninit-value by validating catalog record size
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
hfsplus: fix uninit-value by validating catalog record size
Syzbot reported a KMSAN uninit-value issue in hfsplus_strcasecmp(). The
root cause is that hfs_brec_read() doesn't validate that the on-disk
record size matches the expected size for the record type being read.
When mounting a corrupted filesystem, hfs_brec_read() may read less data
than expected. For example, when reading a catalog thread record, the
debug output showed:
HFSPLUS_BREC_READ: rec_len=520, fd->entrylength=26
HFSPLUS_BREC_READ: WARNING - entrylength (26) < rec_len (520) - PARTIAL READ!
hfs_brec_read() only validates that entrylength is not greater than the
buffer size, but doesn't check if it's less than expected. It successfully
reads 26 bytes into a 520-byte structure and returns success, leaving 494
bytes uninitialized.
This uninitialized data in tmp.thread.nodeName then gets copied by
hfsplus_cat_build_key_uni() and used by hfsplus_strcasecmp(), triggering
the KMSAN warning when the uninitialized bytes are used as array indices
in case_fold().
Fix by introducing hfsplus_brec_read_cat() wrapper that:
1. Calls hfs_brec_read() to read the data
2. Validates the record size based on the type field:
- Fixed size for folder and file records
- Variable size for thread records (depends on string length)
3. Returns -EIO if size doesn't match expected
For thread records, check against HFSPLUS_MIN_THREAD_SZ before reading
nodeName.length to avoid reading uninitialized data at call sites that
don't zero-initialize the entry structure.
Also initialize the tmp variable in hfsplus_find_cat() as defensive
programming to ensure no uninitialized data even if validation is
bypassed.
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hfsplus未验证目录记录大小，可能导致未初始化值问题。
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-2026-46169 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-46169 补丁与修复 (7)
同批安全公告 · Linux · 2026-05-28 · 共 135 条
| CVE-2026-46195 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46135 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46137 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46115 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46155 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46185 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46119 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46238 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46174 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46125 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46198 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46166 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46113 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46212 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46152 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46138 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46232 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46215 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46176 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46157 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 135 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-46169
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