🟠 《高危安全漏洞：CVE-2026-66032》

CVSS 评分: 高危（8.7）　　状态: Received　　发布时间: 2026-07-24

漏洞描述

libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open() function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites.

🔍 技术细节

字段 值
CVE ID CVE-2026-66032
CVSS 评分 8.7 🟠
严重程度 高危
CVSS 向量 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE 分类 CWE-415
发布时间 2026-07-24
最后更新 2026-07-24
状态 Received
数据来源 disclosure@vulncheck.com

🔗 参考链接