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SUSE-SU-2026:2847-1

Опубликовано: 10 июл. 2026
Источник: suse-cvrf

Описание

Security update for krb5

This update for krb5 fixes the following issue

  • CVE-2026-11850: integer underflow in berval2tl_data() leads to heap out-of-bounds read (bsc#1268131).

Список пакетов

Container suse/ltss/sle15.5/sle15:latest
krb5-1.20.1-150500.3.23.1
Container suse/sle-micro/5.5/toolbox:latest
krb5-1.20.1-150500.3.23.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
krb5-1.20.1-150500.3.23.1
krb5-32bit-1.20.1-150500.3.23.1
krb5-client-1.20.1-150500.3.23.1
krb5-devel-1.20.1-150500.3.23.1
krb5-plugin-kdb-ldap-1.20.1-150500.3.23.1
krb5-plugin-preauth-otp-1.20.1-150500.3.23.1
krb5-plugin-preauth-pkinit-1.20.1-150500.3.23.1
krb5-server-1.20.1-150500.3.23.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
krb5-1.20.1-150500.3.23.1
krb5-32bit-1.20.1-150500.3.23.1
krb5-client-1.20.1-150500.3.23.1
krb5-devel-1.20.1-150500.3.23.1
krb5-plugin-kdb-ldap-1.20.1-150500.3.23.1
krb5-plugin-preauth-otp-1.20.1-150500.3.23.1
krb5-plugin-preauth-pkinit-1.20.1-150500.3.23.1
krb5-server-1.20.1-150500.3.23.1
SUSE Linux Enterprise Micro 5.5
krb5-1.20.1-150500.3.23.1
krb5-client-1.20.1-150500.3.23.1
SUSE Linux Enterprise Server 15 SP5-LTSS
krb5-1.20.1-150500.3.23.1
krb5-32bit-1.20.1-150500.3.23.1
krb5-client-1.20.1-150500.3.23.1
krb5-devel-1.20.1-150500.3.23.1
krb5-plugin-kdb-ldap-1.20.1-150500.3.23.1
krb5-plugin-preauth-otp-1.20.1-150500.3.23.1
krb5-plugin-preauth-pkinit-1.20.1-150500.3.23.1
krb5-server-1.20.1-150500.3.23.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5
krb5-1.20.1-150500.3.23.1
krb5-32bit-1.20.1-150500.3.23.1
krb5-client-1.20.1-150500.3.23.1
krb5-devel-1.20.1-150500.3.23.1
krb5-plugin-kdb-ldap-1.20.1-150500.3.23.1
krb5-plugin-preauth-otp-1.20.1-150500.3.23.1
krb5-plugin-preauth-pkinit-1.20.1-150500.3.23.1
krb5-server-1.20.1-150500.3.23.1

Ссылки

Описание

An integer underflow vulnerability was found in MIT krb5 in the berval2tl_data() function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c. The function performs an unsigned subtraction (bv_len - 2) without a prior bounds check. When bv_len is 0 or 1, the subtraction wraps to a large value which is then truncated to uint16_t, yielding 0xFFFE (65534) or 0xFFFF (65535). The subsequent malloc succeeds and memcpy reads up to 65534 bytes from a 0-1 byte buffer, resulting in a heap out-of-bounds read. The attack vector involves a malicious or compromised LDAP KDB backend returning a krbExtraData attribute with bv_len < 2, triggering the underflow when the KDC or kadmind reads principal data.

Затронутые продукты
Container suse/ltss/sle15.5/sle15:latest:krb5-1.20.1-150500.3.23.1
Container suse/sle-micro/5.5/toolbox:latest:krb5-1.20.1-150500.3.23.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:krb5-1.20.1-150500.3.23.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:krb5-32bit-1.20.1-150500.3.23.1
Ссылки
Уязвимость SUSE-SU-2026:2847-1