SUSE SLES15 Security Update : libpcap (SUSE-SU-2026:4194-1)

high Nessus Plugin ID 346207

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4194-1 advisory.

- CVE-2026-0799: the BPF interpreter does not validate values in BPF instructions that load/store a value from/to a scratch memory register and allows for OOB access (bsc#1279782).
- CVE-2026-6244: libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero (bsc#1279595).
- CVE-2026-6554: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction implements looping via backward jumps, but it does not limit the number of loop iterations. Can cause infinite loop (bsc#1279584).
- CVE-2026-18238: `rpcap` client code that processes a `RPCAP_MSG_PACKET` message received from the server incorrectly validates its headers and allows for an OOB access (bsc#1279783).
- CVE-2026-18313: `rpcapd` allocates up to 65536 bytes per each `RPCAP_MSG_UPDATEFILTER_REQ` or `RPCAP_MSG_STARTCAP_REQ` message received from the client and never frees the memory (bsc#1279784).
- CVE-2026-31911: libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode.
In particular uncommon use cases a crafted filter program can terminate the OS process (bsc#1279588).
- CVE-2026-31912: libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buff (bsc#1279593).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected libpcap-devel and / or libpcap1 packages.

Plugin Details

Severity: High

ID: 346207

File Name: suse_SU-2026-4194-1.nasl

Version: 1.2

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 9/16/2026

Updated: 9/17/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.34

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:C/A:C

CVSS Score Source: CVE-2026-0799

CVSS v3

Risk Factor: High

Base Score: 8.7

Temporal Score: 7.6

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:libpcap-devel, p-cpe:/a:novell:suse_linux:libpcap1

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/15/2026

Vulnerability Publication Date: 9/5/2026

Reference Information

CVE: CVE-2026-0799, CVE-2026-18238, CVE-2026-18313, CVE-2026-31911, CVE-2026-31912, CVE-2026-6244, CVE-2026-6554

IAVA: 2026-A-0971

SuSE: SUSE-SU-2026:4194-1

Detections

Analytics