DEBIAN-CVE-2026-66032
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-66032
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-66032.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-66032
- Upstream
- Published
- 2026-07-24T17:17:35Z
- Modified
- 2026-09-12T10:00:29Z
- Severity
-
- 8.7 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / libssh2
Package
- Name
- libssh2
- Purl
- pkg:deb/debian/libssh2?arch=source&distro=bookworm
Debian:13 / libssh2
Package
- Name
- libssh2
- Purl
- pkg:deb/debian/libssh2?arch=source&distro=trixie
Debian:14 / libssh2
Package
- Name
- libssh2
- Purl
- pkg:deb/debian/libssh2?arch=source&distro=forky