DEBIAN-CVE-2026-8836: lwip security update

DEBIAN-CVE-2026-8836, released May 18, 2026, fixes 1 CVE in lwip. None of them is reported as exploited. Patch Radar priority: Routine.

Routine

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

n/a

No CVSS score published

Highest EPSS

0.0110

65th percentile

Fixed package versions

Product	Release	Fixed in
lwip	Debian 13.5 (trixie)	2.2.1+dfsg1-1+deb13u1
lwip	Debian 14	2.2.1+dfsg1-5

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2026-8836	lwip: A vulnerability was found in lwIP up to 2.2.1	n/a	0.0110	None reported

Also fixes CVE-2026-8836

liblwip0 2.1.2+dfsg1-4ubuntu0.1~esm1
liblwip0 on Ubuntu 20.04 LTS (focal)
liblwip0 2.1.3+dfsg1-1ubuntu0.1~esm1
liblwip0 on Ubuntu 22.04.1 LTS (jammy)
liblwip0t64 2.2.0+dfsg1-6.1ubuntu0.1~esm1
liblwip0t64 on Ubuntu 24.04.5 LTS (noble)
liblwip0t64 2.2.1+dfsg1-4ubuntu0.1~esm1
liblwip0t64 on Ubuntu 26.04.1 LTS (resolute)

Vendor advisory

https://security-tracker.debian.org/tracker/CVE-2026-8836

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