DEBIAN-CVE-2026-63090

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Source
https://security-tracker.debian.org/tracker/CVE-2026-63090
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63090.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-63090
Upstream
Published
2026-07-20T15:16:45Z
Modified
2026-09-14T17:03:11Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/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

ProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privilege attackers to achieve arbitrary code execution by sending crafted SFTP packet fragments exceeding the 16 KB reassembly buffer in the fxp.c component. Attackers can supply oversized fragments to trigger an incorrectly conditioned reallocation, corrupt pool freelist metadata, overwrite the root_fs BSS global pointer to reference a fake filesystem struct, and redirect pr_fsio_stat() to system() via a crafted RENAME request.

References

Affected packages

Debian:12 / proftpd-dfsg

Package

Name
proftpd-dfsg
Purl
pkg:deb/debian/proftpd-dfsg?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.3.8+dfsg-4
1.3.8+dfsg-4+deb12u1
1.3.8+dfsg-4+deb12u2
1.3.8+dfsg-4+deb12u3
1.3.8+dfsg-4+deb12u4
1.3.8+dfsg-4+deb12u5
1.3.8+dfsg-5
1.3.8+dfsg-6
1.3.8+dfsg-7
1.3.8+dfsg-8
1.3.8.a+dfsg-1
1.3.8.b+dfsg-1
1.3.8.b+dfsg-2
1.3.8.b+dfsg-3
1.3.8.b+dfsg-4
1.3.8.c+dfsg-1
1.3.8.c+dfsg-2
1.3.8.c+dfsg-3
1.3.8.c+dfsg-4
1.3.9~dfsg-1
1.3.9~dfsg-2
1.3.9~dfsg-3
1.3.9~dfsg-4
1.3.9~dfsg-5
1.3.9a~dfsg-1
1.3.9b~dfsg-1
1.3.9c~dfsg-1
1.3.9d~dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63090.json"

Debian:13 / proftpd-dfsg

Package

Name
proftpd-dfsg
Purl
pkg:deb/debian/proftpd-dfsg?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.3.8.c+dfsg-4+deb13u3

Affected versions

1.*
1.3.8.c+dfsg-4
1.3.8.c+dfsg-4+deb13u1
1.3.8.c+dfsg-4+deb13u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63090.json"

Debian:14 / proftpd-dfsg

Package

Name
proftpd-dfsg
Purl
pkg:deb/debian/proftpd-dfsg?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.3.9c~dfsg-1

Affected versions

1.*
1.3.8.c+dfsg-4
1.3.9~dfsg-1
1.3.9~dfsg-2
1.3.9~dfsg-3
1.3.9~dfsg-4
1.3.9~dfsg-5
1.3.9a~dfsg-1
1.3.9b~dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63090.json"