uev (aka libuev) before 2.4.1 has a buffer overflow in epoll_wait if maxevents is a large number.

published 2024-01-12 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-51315

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

Patch / fix

fixed in 1 distros 2 links 1

troglobit libeuv 2.4.1

debian opensuse

libuev Debian 12 2.4.0-1.1+deb12u1
libuev Debian 14, Debian 13 2.4.1-1

debian advisories DEBIAN-CVE-2022-48620

libuev Package Hub 15 SP5, openSUSE Leap 15.5 2.4.1-bp155.3.3.1

opensuse advisories openSUSE-SU-2024:0023-1

github.com/troglobit/libuev@2d9f1c9 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-48620 updated 2025-11-21

libuev: buffer overflow in epoll_wait() if maxevents is a large number

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 18 mo ago (2025-05-09)

Exploit prediction

1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

Sources

CVE List CVE-2022-48620
NVD CVE-2022-48620

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary