CVE catalog

CVE-2026-88830

A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message.

[CVE catalog]

Severity: High · CVSS 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Sep 23, 2026, 4:35:00 PM UTC
Updated: Sep 23, 2026, 5:17:18 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.35% · Oct 25, 2026

A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	busybox	sid	`1:1.38.0-3`	vulnerable
Debian	busybox	forky	`1:1.38.0-3`	vulnerable
Debian	busybox	trixie	`1:1.37.0-6`	vulnerable
Debian	busybox	bookworm	`1:1.35.0-4+deb12u1`	vulnerable
Opensuse	busybox	tumbleweed	`1.38.0-3.1`	fixed
Suse	busybox	linux enterprise high performance computing 15 sp4-espos	`1.35.0-150400.3.23.1`	fixed
Suse	busybox	linux enterprise high performance computing 15 sp4-ltss	`1.35.0-150400.3.23.1`	fixed
Suse	busybox	linux enterprise server 15 sp4-ltss	`1.35.0-150400.3.23.1`	fixed
Suse	busybox	linux enterprise server for sap applications 15 sp4	`1.35.0-150400.3.23.1`	fixed
Suse	busybox	linux enterprise server 16.0	`1.37.0-160000.8.1`	fixed
Suse	busybox	linux enterprise server for sap applications 16.0	`1.37.0-160000.8.1`	fixed
Suse	busybox	linux enterprise server 12 sp5-ltss	`1.35.0-10.12.1`	fixed
Suse	busybox	linux enterprise server ltss extended security 12 sp5	`1.35.0-10.12.1`	fixed
Suse	busybox	linux enterprise module for basesystem 15 sp7	`1.37.0-150700.18.24.1`	fixed
Opensuse	busybox	leap 16.0	`1.37.0-160000.8.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	busybox	source	sid	`(unfixed)`	not yet assigned	Not reported	[1151048]
Debian	busybox	source	forky	`(unfixed)`	not yet assigned	Not reported	[1151048]
Debian	busybox	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1151048]
Debian	busybox	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1151048]
Opensuse	busybox	rpm	tumbleweed	`1.38.0-3.1`	Not reported	OPENSUSE-SU-2026:11954-1	Not reported
Suse	busybox	rpm	linux enterprise high performance computing 15 sp4-espos	`1.35.0-150400.3.23.1`	Not reported	SUSE-SU-2026:4798-1	Not reported
Suse	busybox	rpm	linux enterprise high performance computing 15 sp4-ltss	`1.35.0-150400.3.23.1`	Not reported	SUSE-SU-2026:4798-1	Not reported
Suse	busybox	rpm	linux enterprise server 15 sp4-ltss	`1.35.0-150400.3.23.1`	Not reported	SUSE-SU-2026:4798-1	Not reported
Suse	busybox	rpm	linux enterprise server for sap applications 15 sp4	`1.35.0-150400.3.23.1`	Not reported	SUSE-SU-2026:4798-1	Not reported
Suse	busybox	rpm	linux enterprise server 16.0	`1.37.0-160000.8.1`	Not reported	SUSE-SU-2026:24215-1	Not reported
Suse	busybox	rpm	linux enterprise server for sap applications 16.0	`1.37.0-160000.8.1`	Not reported	SUSE-SU-2026:24215-1	Not reported
Suse	busybox	rpm	linux enterprise server 12 sp5-ltss	`1.35.0-10.12.1`	Not reported	SUSE-SU-2026:4773-1	Not reported
Suse	busybox	rpm	linux enterprise server ltss extended security 12 sp5	`1.35.0-10.12.1`	Not reported	SUSE-SU-2026:4773-1	Not reported
Suse	busybox	rpm	linux enterprise module for basesystem 15 sp7	`1.37.0-150700.18.24.1`	Not reported	SUSE-SU-2026:4760-1	Not reported
Opensuse	busybox	rpm	leap 16.0	`1.37.0-160000.8.1`	Not reported	OPENSUSE-SU-2026:22067-1	Not reported

[Debian bug #1151048]

Notes

[trixie] busybox: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[busybox]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[busybox-static]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[busybox-syslogd]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1 · all · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1 · all · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[udhcpc]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
[udhcpd]Affected
Source package: [busybox]
Details (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Affected
  nvd · busybox · debian · bookworm; nvd · busybox · debian · 12

[Debian 13 (Trixie)]

[busybox]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Affected
  nvd · busybox · debian · 13
[busybox-static]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Affected
  nvd · busybox · debian · 13
[busybox-syslogd]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
[udhcpc]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
[udhcpd]Affected
Source package: [busybox]
Details (2)
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Affected
  nvd · busybox · debian · 13

[openSUSE Tumbleweed]

[busybox]Affected
Source package: [busybox]
Details (1)
- 1.38.0-2.1 · x86_64 · tumbleweed
  Affected · Fixed: 1.38.0-3.1
  nvd · busybox · opensuse · tumbleweed
[busybox-static]Unknown
Source package: [busybox]
Details (1)
- 1.38.0-2.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.38.0-3.1
  Version impact unknown
  nvd · busybox · opensuse · tumbleweed
[busybox-testsuite]Unknown
Source package: [busybox]
Details (1)
- 1.38.0-2.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.38.0-3.1
  Version impact unknown
  nvd · busybox · opensuse · tumbleweed
[busybox-warewulf3]Unknown
Source package: [busybox]
Details (1)
- 1.38.0-2.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.38.0-3.1
  Version impact unknown
  nvd · busybox · opensuse · tumbleweed

Observed: Oct 23, 2026, 11:06:19 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]