CVE-2026-74485— 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基金会开源的一个操作系统内核。 Linux kernel 2.6.12版本存在安全漏洞，该漏洞源于fs/binfmt_misc.c中binfmt_misc注册字符串的字段分隔符为标志字符时验证不当，导致标志扫描越界读取，可能造成信息泄露或系统崩溃。
可能的 ATT&CK 技术 1 AI
T1115 · Clipboard Data影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 96bd5d4fea2970b9b08265293ca7a10b9b27c0fd |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9970e094e5d60f0d66914bf9a97d1ef19107ebf5 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b29e3c1f375c1296362d219ff38bceddf2d2a88a |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1819f82dee766c58295ecaacdac02cdf6837d7a4 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1853e95c9bfe69ef1dd862b3f551e68f4a1b76cc |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 840bb9c49c3e75fb32b593d67ab32f6b77122262 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9a2d87db3898b5993b64fd258d0334e0eba9ee0d |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8e85d50ba1117fd446bf9a250bd8a97d48384bdc |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-74485 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
binfmt_misc: reject a flag character as the field delimiter
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
binfmt_misc: reject a flag character as the field delimiter
The registration string starts with a user chosen delimiter that
separates the individual fields. So that the field parsers terminate
even on a truncated string create_entry() pads the buffer with that
same delimiter:
memset(buf + count, del, 8);
Most fields are scanned for the delimiter with strchr()/scanarg() and
happily stop on the padding. The flags field is different: instead of
scanning for the delimiter check_special_flags() consumes the flag
characters 'P', 'O', 'C' and 'F' and stops at the first byte that is
none of them, relying on the trailing delimiter to end the scan.
If the delimiter is itself a flag character the padding no longer acts
as a terminator. The scan swallows all eight padding bytes and keeps
reading past the end of the allocation until it hits a byte that is
not a flag character. For example registering
PaPEPPxPPiP
with 'P' as the delimiter (name "a", type extension, magic "x",
interpreter "i", empty flags) leaves the flag scan running off the end
of the buffer. The registration is rejected in the end because the
parser does not stop exactly at buf + count, but only after the out of
bounds read has already happened. With an unlucky allocation layout the
scan can walk into an unmapped page; under KASAN it is reported as a
slab out of bounds read. binfmt_misc mounts are available to
unprivileged users in a user namespace so the read is reachable without
privileges.
Reject a delimiter that is one of the flag characters up front. Such a
registration was always rejected anyway, only after the out of bounds
read, so no valid registration string changes meaning.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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基金会开源的一个操作系统内核。 Linux kernel 2.6.12版本存在安全漏洞，该漏洞源于fs/binfmt_misc.c中binfmt_misc注册字符串的字段分隔符为标志字符时验证不当，导致标志扫描越界读取，可能造成信息泄露或系统崩溃。
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-2026-74485 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-74485 补丁与修复 (7)
同批安全公告 · Linux · 2026-08-15 · 共 845 条
| CVE-2026-74280 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74279 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74475 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72421 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72408 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72407 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72221 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72466 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72323 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72463 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72069 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72339 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72065 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72064 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74255 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74376 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72234 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72041 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 845 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-74485
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