CVE-2026-29111
systemd: Local unprivileged user can trigger an assert
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.
INFO
Published Date :
March 23, 2026, 10:16 p.m.
Last Modified :
March 23, 2026, 10:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-29111
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update systemd to a patched version.
- Apply vendor-provided patches for systemd.
- Restart systemd after applying updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-29111.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-29111 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-29111
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-29111 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-29111 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Mar. 23, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-269 Added Reference https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a Added Reference https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6 Added Reference https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412 Added Reference https://github.com/systemd/systemd/commit/3cee294fe8cf4fa0eff933ab21416d099942cabd Added Reference https://github.com/systemd/systemd/commit/42aee39107fbdd7db1ccd402a2151822b2805e9f Added Reference https://github.com/systemd/systemd/commit/54588d2dedff54bfb6036670820650e4ea74628f Added Reference https://github.com/systemd/systemd/commit/7ac3220213690e8a8d6d2a6e81e43bd1dce01d69 Added Reference https://github.com/systemd/systemd/commit/80acea4ef80a4bb78560ed970c34952299b890d6 Added Reference https://github.com/systemd/systemd/commit/b5fd14693057e5f2c9b4a49603be64ec3608ff6c Added Reference https://github.com/systemd/systemd/commit/efa6ba2ab625aaa160ac435a09e6482fc63bdbe8 Added Reference https://github.com/systemd/systemd/security/advisories/GHSA-gx6q-6f99-m764