libinput: Improper Neutralization of CRLF Sequences
CVE-2026-50292 is a critical-severity improper neutralization of CRLF sequences vulnerability in libinput from Freedesktop, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 1.30.4, 1.31.3 as the first without the flaw, so updating libinput to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.31% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update libinput to 1.30.4 or 1.31.3, whichever matches your release line, or a later version.
- Read the advisory on gitlab.freedesktop.org for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Freedesktop | libinput | before 1.30.4; 1.31.0 up to, but not including, 1.31.3 | 1.30.4, 1.31.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.4 | High | CNA (mitre.org) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
In libinput before 1.30.4 and 1.31.x before 1.31.3, libinput-device-group unescaped phys output can inject udev properties leading to arbitrary root code execution
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of CRLF Sequences
The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
How developers prevent this class of flaw
- Appropriately filter or quote CRLF sequences in user-controlled input.
More Improper Neutralization of CRLF Sequences vulnerabilities (CWE-93)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- gitlab.freedesktop.org/libinput/libinput/-/commit/76f0d8a7f57e2868882864b4611281f12f704b55
- openwall.com/lists/oss-security/2026/06/04/5Mailing List, Third Party Advisory
Other vulnerabilities in libinput
- 8.8 High severity
Recent Improper Neutralization of CRLF Sequences vulnerabilities
- 7.5 High severity
- 9.9 Critical severity
- 7.5 High severity
- 7.5 High severity
- 7.3 High severity
- 8.2 High severity
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