How severe is CVE-2023-24626?

CVE-2023-24626 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-24626 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-24626?

CVE-2023-24626 affects Gnu Screen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-24626?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-24626 published?

CVE-2023-24626 was published on 2023-04-08 and last updated on 2026-06-17.

CVE-2023-24626

CVE-2023-24626 is a medium-severity vulnerability in Gnu Screen with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Gnu Screen
Published: 2023-04-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-24626?: 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.
How severe is CVE-2023-24626?: CVE-2023-24626 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-24626 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-24626?: CVE-2023-24626 affects Gnu Screen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-24626?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-24626 published?: CVE-2023-24626 was published on 2023-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gnu:screen:*:*:*:*:*:*:*:*

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