CVE-2026-91018

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

Not scored by EPSS

EPSS percentile

Not scored by EPSS

NVD base score

The NVD has published no score for this record

NVD CVSS vector

No NVD score to derive

NVD analysis status

Not recorded

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-09-22 20:25Z1 HR AGO

Last updated

2026-09-22 20:25Z1 HR AGO

Reserved

2026-09-14

Assigning CNA

icscert

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-415Double FreeVariant

Data version

5.2

Document digest

9309eacebd48e2babd4ec96c90d54bb83b39ee9a28a39ac1e9017842717c0ab6

• cgit.git.savannah.gnu.orghttps://cgit.git.savannah.gnu.org/cgit/lwip.git
• www.cisa.govhttps://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02
• github.comhttps://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json