CVE-2026-10645— Zephyr Project Zephyr 缓冲区错误漏洞
一分钟漏洞结论
影响对象
zephyrproject zephyr
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。
zephyrproject-rtos Zephyr是zephyrproject-rtos的实时操作系统。 Zephyr Project Zephyr 4.4版本及之前版本存在缓冲区错误漏洞，该漏洞源于ext2目录项解析器未完全验证磁盘目录项结构，可能导致特制ext2镜像引发越界读取或无限循环，导致拒绝服务。
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| zephyrproject | zephyr | 3.5.0< 4.5.0 |
affected |
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一、 漏洞 CVE-2026-10645 基础信息
漏洞信息
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Vulnerability Title
Out-of-bounds read in Zephyr ext2 directory entry traversal from a crafted filesystem image
来源: CVE Program / CVE List V5
Vulnerability Description
The Zephyr ext2 filesystem driver (subsys/fs/ext2) trusted the on-disk directory entry fields de_rec_len and de_name_len when walking a directory block. ext2_fetch_direntry() guarded only with de_name_len > EXT2_MAX_FILE_NAME, but de_name_len is a uint8_t and EXT2_MAX_FILE_NAME is 255, so the check is always false; the function then memcpy'd up to 255 name bytes and the lookup/readdir paths advanced traversal by an unvalidated de_rec_len. Each directory block is read into a block_size-sized slab buffer, and block_off can be driven near the block end by preceding entries' rec_len, so the 8-byte header read and the subsequent name memcpy can read up to ~263 bytes past the end of the block buffer into adjacent heap/slab memory. On the readdir path those bytes are returned to the caller in fs_dirent.name, leaking adjacent kernel heap memory; a de_rec_len of 0 also causes a zero-progress infinite loop (denial of service), and the unlink path's memmove(de, next, next_reclen) over unvalidated records is an additional OOB read/write source. The defect is reached by any path-based operation (open, stat, unlink, rename, mkdir) or directory listing on a mounted ext2 volume, so a crafted or corrupted ext2 image on attacker-supplied storage (SD card, USB mass storage, or otherwise mounted image) triggers it. Affected: Zephyr ext2 from its introduction in v3.5.0 through v4.4.0. The fix validates rec_len and name_len in the parser and rejects entries whose header does not fit the remaining block or whose rec_len crosses the block boundary in every traversal caller.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
来源: CVE Program / CVE List V5
Vulnerability Title
Zephyr Project Zephyr 缓冲区错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
zephyrproject-rtos Zephyr是zephyrproject-rtos的实时操作系统。 Zephyr Project Zephyr 4.4版本及之前版本存在缓冲区错误漏洞，该漏洞源于ext2目录项解析器未完全验证磁盘目录项结构，可能导致特制ext2镜像引发越界读取或无限循环，导致拒绝服务。
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
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| zephyrproject | zephyr | 3.5.0 ~ 4.5.0 | - |
|
二、漏洞 CVE-2026-10645 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-10645 补丁与修复 (1)
CVE-2026-10645 厂商安全公告 (1)
同批安全公告 · zephyrproject · 2026-06-22 · 共 3 条
| CVE-2026-10651 | 7.1 HIGH | Zephyr Project Zephyr 输入验证错误漏洞 |
| CVE-2026-10658 | 7.1 HIGH | Zephyr Project Zephyr 缓冲区错误漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-10645
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