Threats Tagged 'cve-2026-11850'
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Threats Tagged 'cve-2026-11850'
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CVE-2026-11850: Integer Underflow (Wrap or Wraparound) in Red Hat Red Hat Enterprise Linux 10CVE-2026-11850 0 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. Join the discussion | CVE Database V5 | 06/11/2026, 09:49:07 UTC Added: 06/11/2026, 09:57:27 UTC |
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