How severe is CVE-2026-29111?

CVE-2026-29111 has a CVSS 3.x base score of 5.5, 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-2026-29111 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29111?

CVE-2026-29111 affects Systemd Project Systemd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29111?

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

Does CVE-2026-29111 have an EU (EUVD) identifier?

Yes. CVE-2026-29111 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14562.

When was CVE-2026-29111 published?

CVE-2026-29111 was published on 2026-03-23 and last updated on 2026-06-17.

CVE-2026-29111

CVE-2026-29111 is a medium-severity vulnerability in Systemd Project Systemd with a CVSS 3.x base score of 5.5. 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-269.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14562
Weakness: CWE-269
Affected product: Systemd Project Systemd
Published: 2026-03-23
Last modified: 2026-06-17

Description

systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.

Frequently asked questions

What is CVE-2026-29111?: systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.
How severe is CVE-2026-29111?: CVE-2026-29111 has a CVSS 3.x base score of 5.5, 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-2026-29111 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29111?: CVE-2026-29111 affects Systemd Project Systemd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29111?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-29111 have an EU (EUVD) identifier?: Yes. CVE-2026-29111 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14562.
When was CVE-2026-29111 published?: CVE-2026-29111 was published on 2026-03-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*

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