CVE-2026-5450

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total 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

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 41.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-14.

Red Hat severity

Moderate. 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

2026-04-20 20:55Z4 MO AGO

Last updated

2026-07-14 12:45Z1 MO AGO

Reserved

2026-04-02

Assigning CNA

glibc

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase
• CWE-131Incorrect Calculation of Buffer SizeBase

Data version

5.2

Document digest

52b77a071bcc3a66ff3293b16227751a45f1eca0dc76f4d7dc78d23ae2171389

• sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450issue-tracking
• inbox.sourceware.orghttps://inbox.sourceware.org/libc-announce/b11f0003-6ec1-4bd6-b9de-9e38a4efeca3@redhat.com/T/#umailing-list
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html