CVE-2025-49178

CVE-2025-49178 is a medium-severity vulnerability 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-667.

Key facts

Description

A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.

Frequently asked questions

What is CVE-2025-49178?
A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.
How severe is CVE-2025-49178?
CVE-2025-49178 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-2025-49178 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-49178?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-49178 have an EU (EUVD) identifier?
Yes. CVE-2025-49178 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18501.
When was CVE-2025-49178 published?
CVE-2025-49178 was published on 2025-06-17 and last updated on 2026-06-30.

References

Other CWE-667 (Improper Locking) vulnerabilities

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