CVE-2023-31439

5.3 mediumEPSS 0.3%

Medium (5.3) in systemd project systemd. EPSS 0.3% chance of exploitation in the next 30 days.

An issue was discovered in systemd 253. An attacker can modify the contents of past events in a sealed log file and then adjust the file such that checking the integrity shows no error, despite modifications. NOTE: the vendor reportedly sent "a reply denying that any of the finding was a security vulnerability."

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-31)
CWE: CWE-354
Published: 2023-06-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

systemd_project:systemd

References

https://github.com/kastel-security/Journald
https://github.com/kastel-security/Journald/blob/main/journald-publication.pdf
https://github.com/systemd/systemd/pull/28885
https://github.com/systemd/systemd/releases
https://github.com/kastel-security/Journald

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