In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.18.0, <= 1.22.2CPE matchmatch criteria | cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* | ||
>= 1.18, < 1.22.3CPE match | cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Kerberos vulnerabilities
Jul 22, 2026krb5: MIT Kerberos 5 (krb5): Denial of Service via integer underflow and out-of-bounds read
Apr 28, 2026In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message.
Apr 14, 2026