MediumFix available
screen — security advisory
socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.
- Products
- screen
- Affected versions
- 4.9.0-4, 4.9.1-1, 4.9.1-1+hurd.1, 4.9.1-1+hurd.2, 4.9.1-2, 4.9.1-3, 4.9.1-3.1, 5.0.1-1, 5.0.1-1.1, 5.0.1-1.1+be, 5.0.1-2, 5.0.1-3, 5.0.2-1
- Fixed versions
- 4.9.1-1
- CVEs
- CVE-2023-24626
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:26 UTC · Revision 1
Source evidence
socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.
osv:DEBIAN-CVE-2023-24626
screen
Fixed versions: Not specified
screen
Fixed versions: 4.9.1-1
screen
Fixed versions: 4.9.1-1
Complete source record
{
"id": "a25596e6d58b554166d788b1968125b7f5ab0e0c5b7d831252de6d894ded26f9",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-24626",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-24626",
"summary": "socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.",
"evidence": "osv:DEBIAN-CVE-2023-24626",
"products": [
{
"name": {
"value": "screen",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.9.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.1-1+hurd.1",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.1-1+hurd.2",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.1-3.1",
"evidence": "/affected/0/versions"
},
{
"value": "5.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.0.1-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "5.0.1-1.1+be",
"evidence": "/affected/0/versions"
},
{
"value": "5.0.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.0.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "5.0.2-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "screen",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.9.1-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "screen",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.9.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2023-24626",
"aliases": [
"DEBIAN-CVE-2023-24626"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "screen",
"purl": "pkg:deb/debian/screen?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.9.0-4",
"4.9.1-1",
"4.9.1-1+hurd.1",
"4.9.1-1+hurd.2",
"4.9.1-2",
"4.9.1-3",
"4.9.1-3.1",
"5.0.1-1",
"5.0.1-1.1",
"5.0.1-1.1+be",
"5.0.1-2",
"5.0.1-3",
"5.0.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-24626.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.9.1-1"
}
]
}
],
"package": {
"name": "screen",
"purl": "pkg:deb/debian/screen?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-24626.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.9.1-1"
}
]
}
],
"package": {
"name": "screen",
"purl": "pkg:deb/debian/screen?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-24626.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-26T18:00:35.925479611Z",
"provider": "osv",
"upstream": [
"CVE-2023-24626"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-24626"
]
},
"related_cves": [
{
"value": "CVE-2023-24626",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 455084,
"published_at": "2023-04-08T05:15:07.063+00:00"
}