High [CVE-2026-85508] stack-based buffer overflow in ipmi-oem Dell system info handler
This high-severity Red Hat Linux advisory covers CVE-2026-85508.
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Summary
A stack-based buffer overflow exists in FreeIPMI's ipmi-oem tool, in the Dell OEM handler for the get-system-info cmc-ipv6-info subcommand. The vulnerable function _output_dell_system_info_cmc_ipv6_info uses a 256-byte stack buffer but allows up to 65536 bytes of data to be copied from a BMC response without proper bounds checking.
This flaw has limited practical impact for several reasons: (1) ipmi-oem is a client-side command-line tool run manually by administrators, not a listening service or daemon — exploitation requires a user to actively run the specific Dell OEM subcommand against a compromised or malicious BMC; (2) IPMI communication typically occurs over a dedicated out-of-band management network, not the general Internet; (3) Red Hat Enterprise Linux builds FreeIPMI with full hardening enabled (_hardened_build 1), including stack protector (-fstack-protector-strong), which detects stack buffer corruption and terminates the process before the return address can be hijacked — effectively limiting the impact to a client-side crash rather than code execution; (4) additional mitigations including PIE, full RELRO, and NX further hinder exploitation even if the stack canary were bypassed.
Fix is available in FreeIPMI version 1.6.19. Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
Weakness: CWE-121.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Do not run ipmi-oem dell get-system-info subcommands (specifically idrac-info, cmc-info, and cmc-ipv6-info) against untrusted or unverified BMC endpoints. Restrict IPMI management network access to trusted administrators and trusted BMC controllers only. If the ipmi-oem Dell OEM subcommands are not needed, avoid using them entirely.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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