SB2026101352 - Multiple vulnerabilities in IBM PowerVC
Published: October 13, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-42792)
CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of exceptional conditions in the do_accept function in erts/epmd/src/epmd_srv.c when handling TCP connection attempts after file descriptor exhaustion. A remote attacker can hold many TCP connections open and trigger accept(2) to return EMFILE or ENFILE to cause a denial of service.
The issue is feasible from a single source because epmd has no per-source-IP connection cap.
2) Signed to Unsigned Conversion Error (CVE-ID: CVE-2026-55737)
CWE-ID: CWE-195 - Signed to Unsigned Conversion Error
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to signed to unsigned conversion error in LARGE_TUPLE_EXT decoding in binary_to_term/1 when parsing untrusted external term format data. A remote attacker can supply a specially crafted binary term to cause a denial of service.
The issue affects the Erlang runtime functions decoded_size() and dec_term() in external.c.
Remediation
Install update from vendor's website.