DEBIAN-CVE-2026-58050

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Source
https://security-tracker.debian.org/tracker/CVE-2026-58050
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58050.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-58050
Upstream
Published
2026-06-28T02:16:32Z
Modified
2026-09-12T10:00:26Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client.

References

Affected packages

Debian:12 / libssh2

Package

Name
libssh2
Purl
pkg:deb/debian/libssh2?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.10.0-3+deb12u1

Affected versions

1.*
1.10.0-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58050.json"

Debian:13 / libssh2

Package

Name
libssh2
Purl
pkg:deb/debian/libssh2?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.11.1-1+deb13u2

Affected versions

1.*
1.11.1-1
1.11.1-1+deb13u1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58050.json"

Debian:14 / libssh2

Package

Name
libssh2
Purl
pkg:deb/debian/libssh2?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.11.1-6

Affected versions

1.*
1.11.1-1
1.11.1-2
1.11.1-3
1.11.1-4
1.11.1-5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58050.json"