CVE-2023-24626: gnu screen
CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2023-24626MGASA-2024-0057UBUNTU-CVE-2023-24626USN-6198-1DEBIAN-CVE-2023-24626openSUSE-SU-2024:13285-1
Published 08-04-2023Last modified 09-05-2025
Vulnerability summary
CVE-2023-24626 is a medium (CVSS 6.5) vulnerability in gnu screen. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.54%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 08-04-2023PublishedVulnerability first disclosed.
- 09-05-2025Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 5 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:HSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
0.54%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
0.00 pp
From 0.54% on 20-09-2026
20-09-202620-10-2026
EPSS score0.54%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundGNU screen v4.9.0 - Privilege Escalation
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- screen< 4.8.0-r6 | < 4.9.0-r1 | < 4.9.0-r3
Debian1 product
- screenAll versions (No fix recorded) | < 4.9.1-1
Gnu1 product
- screen≤ 4.9.0
Mageia1 product
- screen< 4.9.0-4.1.mga9
Opensuse1 product
- screen&distro=openSUSE Tumbleweed< 4.9.1-1.1
Ubuntu1 product
- screenAll versions (No fix recorded) | < 4.9.0-1ubuntu0.1 | < 4.1.0~20120320gitdb59704-9ubuntu0.1~esm3 | < 4.3.1-2ubuntu0.1+esm1 | < 4.6.2-1ubuntu1.1+esm1
6 vendors · 6 products
