PatchTheCEVCVE-2026-60109: Zeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that all
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HIGH 7.5REMOTEUPGRADE
CVE-2026-60109 is a high-severity flaw (CVSS 7.5) affecting zeek. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Zeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that allows unauthenticated remote attackers to crash the sensor by sending a crafted KRB_ERROR message with error-code 25 (KDC_ERR_PREAUTH_REQUIRED) containing a PA-DATA element with padata-type 2, 3, 11, or 19. Attackers can exploit a parser and analyzer state mismatch where proc_padata() dereferences an uninitialized pa_data_element field sele
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 40%) |
| CISA exploited list | No |
| Weakness | CWE-476 |
| Published | 2026-07-09 |
| Last modified | 2026-10-23 |
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
zeek zeek UPGRADE
Affected: < 8.0.9
Fixed in: 8.0.9
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy zeek || rpm -q zeek || zeek --version
2. UPGRADE to 8.0.9 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade zeek
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade zeek
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Exact fixes by distribution
Fedora 46 · rubygem-eventmachine · FIXED · 1.2.7-37.fc46 · FEDORA-2026-7194c202a2 · source
sudo dnf upgrade --advisory=FEDORA-2026-7194c202a2
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.