cockpit · Integer Overflow
Affects cockpitSource GCVE Database
Not known to be exploited · CVSS 3.6 Low.
Data as of 7 Nov 2026, 23:24 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 3.6 |
|---|
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 18 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10cockpitpkg:deb/ubuntu/cockpit?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTScockpitpkg:deb/ubuntu/cockpit?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTScockpitpkg:deb/ubuntu/cockpit?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTScockpitpkg:deb/ubuntu/cockpit?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 20.04 LTScockpitpkg:deb/ubuntu/cockpit?arch=source&distro=focalOther threats | Affected
| Fixed in– |
Ubuntu 18.04 LTScockpitpkg:deb/ubuntu/cockpit?arch=source&distro=bionicOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
CVE-2026-91142 is an integer overflow vulnerability in the do_lastlog() function of Cockpit on ILP32 builds in Red Hat Enterprise Linux 10. A low-privileged authenticated user with a large UID can cause offset calculation wraparound, leading to unauthorized reads and writes of other users' lastlog records. This may disclose or alter sensitive login accounting information but does not allow code execution or privilege escalation. The vulnerability has a low severity with a CVSS score of 3.6.