Описание
Security update for gnutls
This update for gnutls fixes the following issues
- CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
- CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
- CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
Список пакетов
Image SLES12-SP5-Azure-SAP-BYOS
Image SLES12-SP5-Azure-SAP-On-Demand
Image SLES12-SP5-EC2-ECS-On-Demand
Image SLES12-SP5-EC2-SAP-BYOS
Image SLES12-SP5-EC2-SAP-On-Demand
Image SLES12-SP5-GCE-SAP-BYOS
Image SLES12-SP5-GCE-SAP-On-Demand
SUSE Linux Enterprise Server 12 SP5-LTSS
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
Ссылки
- Link for SUSE-SU-2026:2367-1
- E-Mail link for SUSE-SU-2026:2367-1
- SUSE Security Ratings
- SUSE Bug 1263704
- SUSE Bug 1263705
- SUSE Bug 1263708
- SUSE CVE CVE-2025-9820 page
- SUSE CVE CVE-2026-33845 page
- SUSE CVE CVE-2026-33846 page
- SUSE CVE CVE-2026-42009 page
Описание
A flaw was found in the GnuTLS library, specifically in the gnutls_pkcs11_token_init() function that handles PKCS#11 token initialization. When a token label longer than expected is processed, the function writes past the end of a fixed-size stack buffer. This programming error can cause the application using GnuTLS to crash or, in certain conditions, be exploited for code execution. As a result, systems or applications relying on GnuTLS may be vulnerable to a denial of service or local privilege escalation attacks.
Затронутые продукты
Ссылки
- CVE-2025-9820
- SUSE Bug 1254132
Описание
A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.
Затронутые продукты
Ссылки
- CVE-2026-33845
- SUSE Bug 1263704
Описание
A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains consistent across all fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with conflicting message_length values, causing the implementation to allocate a buffer based on a smaller initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because the merge operation does not enforce proper bounds checking against the allocated buffer size, this results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without authentication via the DTLS handshake path and can lead to application crashes or potential memory corruption.
Затронутые продукты
Ссылки
- CVE-2026-33846
- SUSE Bug 1263705
Описание
A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.
Затронутые продукты
Ссылки
- CVE-2026-42009
- SUSE Bug 1263708