CVE catalog
CVE-2023-6779
glibc: CVE-2023-6779
- Severity
- High · CVSS 8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.15% · Oct 25, 2026
An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | glibc | sid | 2.43-7 | fixed |
| Debian | glibc | forky | 2.43-7 | fixed |
| Debian | glibc | trixie | 2.41-12+deb13u4 | fixed |
| Debian | glibc | bookworm | 2.36-9+deb12u14 | fixed |
| Debian | glibc | bookworm-security | 2.36-9+deb12u7 | fixed |
| Ubuntu | glibc | 24.04 | 2.38-1ubuntu6 | vulnerable |
| Ubuntu | glibc | 24.04 | 2.38-3ubuntu1 | vulnerable |
| Ubuntu | glibc | 24.04 | 2.39-0ubuntu1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | glibc | source | sid | 2.37-15 | not yet assigned | Not reported | Not reported |
| Debian | glibc | source | forky | 2.37-15 | not yet assigned | Not reported | Not reported |
| Debian | glibc | source | trixie | 2.37-15 | not yet assigned | Not reported | Not reported |
| Debian | glibc | source | bookworm | 2.36-9+deb12u4 | not yet assigned | Not reported | Not reported |
| Ubuntu | glibc | deb | 24.04 | 2.39-0ubuntu1 | Not reported | UBUNTU-CVE-2023-6779 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-082556.json]
- [https://ftp.suse.com/pub/projects/security/]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-6779]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-6779]
- [https://security-tracker.debian.org/tracker/CVE-2023-6779]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-6779.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0246.json]
[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]