CVE-2026-78408

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 8.9% of scored records. A rank, not a probability.

NVD base score

7.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-21.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-02 15:05Z1 MO AGO

Last updated

2026-10-21 17:51Z7 DAYS AGO

Reserved

2026-08-24

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.9)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H

Weaknesses

• CWE-775Missing Release of File Descriptor or Handle after Effective LifetimeVariant

Data version

5.2

Document digest

7f6ef320740548330101198e0f654cf4d8bee85792942438c07a7a0368389759

• access.redhat.comRHSA-2026:63162https://access.redhat.com/errata/RHSA-2026:63162vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-78408vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2522497https://bugzilla.redhat.com/show_bug.cgi?id=2522497issue-trackingx_refsource_REDHAT
• github.comhttps://github.com/util-linux/util-linux/security/advisories/GHSA-55fx-f4gg-cfhj
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/09/05/2