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Fencer Intel
high 7.5

CVE-2026-33554 json

ipmi-oem in FreeIPMI before 1.6.17 has exploitable buffer overflows on response messages.

published 7mo ago modified 4mo ago also EUVD-2026-14899

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

ipmi-oem in FreeIPMI before 1.6.17 has exploitable buffer overflows on response messages. The Intelligent Platform Management Interface (IPMI) specification defines a set of interfaces for platform management. It is implemented by a large number of hardware manufacturers to support system management. It is most commonly used for sensor reading (e.g., CPU temperatures through the ipmi-sensors command within FreeIPMI) and remote power control (the ipmipower command). The ipmi-oem client command implements a set of a IPMI OEM commands for specific hardware vendors. If a user has supported hardware, they may wish to use the ipmi-oem command to send a request to a server to retrieve specific information. Three subcommands were found to have exploitable buffer overflows on response messages. They are: "ipmi-oem dell get-last-post-code - get the last POST code and string describing the error on some Dell servers," "ipmi-oem supermicro extra-firmware-info - get extra firmware info on Supermicro servers," and "ipmi-oem wistron read-proprietary-string - read a proprietary string on Wistron servers."

Patch / fix

  • FreeIPMI FreeIPMI 1.6.17
  • freeipmi Debian 14 1.6.17-1

debian advisories DEBIAN-CVE-2026-33554

  • freeipmi Ubuntu 22.04 LTS 1.6.9-2ubuntu0.22.04.3
  • freeipmi Ubuntu 24.04 LTS 1.6.13-3ubuntu0.1
  • freeipmi Ubuntu 26.04 LTS 1.6.16-1ubuntu0.1
  • freeipmi Ubuntu Pro 14.04 LTS 1.1.5-3ubuntu3.3+esm1
  • freeipmi Ubuntu Pro 16.04 LTS 1.4.11-1.1ubuntu4.1~0.16.04.1~esm1
  • freeipmi Ubuntu Pro 18.04 LTS 1.4.11-1.1ubuntu4.1+esm1
  • freeipmi Ubuntu Pro 20.04 LTS 1.6.4-3ubuntu1.1+esm1

ubuntu advisories UBUNTU-CVE-2026-33554

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • freeipmi RHEL 8 1.6.17-1.el8_10
  • freeipmi-ipmiseld RHEL 8 1.6.17-1.el8_10
  • freeipmi-ipmidetectd RHEL 8 1.6.17-1.el8_10
  • freeipmi-bmc-watchdog RHEL 8 1.6.17-1.el8_10
  • freeipmi RHEL 9 1.6.17-1.el9_8
  • freeipmi-ipmiseld RHEL 9 1.6.17-1.el9_8
  • freeipmi-ipmidetectd RHEL 9 1.6.17-1.el9_8
  • freeipmi-bmc-watchdog RHEL 9 1.6.17-1.el9_8

red hat advisories RHSA-2026:50772RHSA-2026:50769RHSA-2026:50729RHSA-2026:48826RHSA-2026:39010RHSA-2026:39008

  • freeipmi SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.6.15-160000.3.1

suse advisories SUSE-SU-2026:21231-1SUSE-SU-2026:21212-1

  • freeipmi openSUSE Leap 16.0 1.6.15-160000.3.1
  • freeipmi openSUSE Tumbleweed 1.6.17-1.1

opensuse advisories openSUSE-SU-2026:20556-1openSUSE-SU-2026:10436-1

  • freeipmi AlmaLinux 8 1.6.17-1.el8_10
  • freeipmi-ipmiseld AlmaLinux 8 1.6.17-1.el8_10
  • freeipmi-ipmidetectd AlmaLinux 8 1.6.17-1.el8_10
  • freeipmi-bmc-watchdog AlmaLinux 8 1.6.17-1.el8_10
  • freeipmi AlmaLinux 10 1.6.17-1.el10_2
  • freeipmi-ipmiseld AlmaLinux 10 1.6.17-1.el10_2
  • freeipmi-ipmidetectd AlmaLinux 10 1.6.17-1.el10_2
  • freeipmi-bmc-watchdog AlmaLinux 10 1.6.17-1.el10_2

almalinux advisories ALSA-2026:20579ALSA-2026:19053ALSA-2026:19208ALSA-2026:14819ALSA-2026:13515

  • freeipmi Rocky Linux 10 1.6.17-1.el10_1
  • freeipmi Rocky Linux 8 1.6.17-1.el8_10
  • freeipmi Rocky Linux 9 1.6.17-1.el9_7

rocky linux advisories RLSA-2026:19053RLSA-2026:20579RLSA-2026:19208RLSA-2026:14819RLSA-2026:13515

  • freeipmi Alpine 3.24, Alpine 3.23 1.6.17-r0

alpine advisories ALPINE-CVE-2026-33554

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • freeipmi Azure Linux 3.0 1.6.17-1

azure linux advisories AZL-81423

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-33554 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-33554 updated cvss 8.8

freeipmi: buffer overflows on response messages via ipmi-oem

  • Red Hat Enterprise Linux 6 freeipmi, freeipmi-ipmidetectd, freeipmi-bmc-watchdog
    affected: workaround, no fix planned “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) freeipmi-devel 1.6.14-2.el9_6.1, freeipmi-debuginfo 1.6.14-2.el9_6.1, freeipmi-debugsource 1.6.14-2.el9_6.1, freeipmi-ipmiseld-debuginfo 1.6.14-2.el9_6.1, freeipmi-ipmidetectd-debuginfo 1.6.14-2.el9_6.1, freeipmi-bmc-watchdog-debuginfo 1.6.14-2.el9_6.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:39006
  • Red Hat Enterprise Linux AppStream (v. 9) freeipmi 1.6.17-1.el9_7, freeipmi 1.6.17-1.el9_8, freeipmi-ipmiseld 1.6.17-1.el9_7, freeipmi-ipmiseld 1.6.17-1.el9_8, freeipmi-ipmidetectd 1.6.17-1.el9_7, freeipmi-ipmidetectd 1.6.17-1.el9_8, +2 more
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:14819
  • Red Hat Enterprise Linux AppStream (v. 10) freeipmi 1.6.17-1.el10_1, freeipmi 1.6.17-1.el10_2, freeipmi-ipmiseld 1.6.17-1.el10_1, freeipmi-ipmiseld 1.6.17-1.el10_2, freeipmi-ipmidetectd 1.6.17-1.el10_1, freeipmi-ipmidetectd 1.6.17-1.el10_2, +2 more
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:13515
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) freeipmi 1.6.14-2.el9_2.1, freeipmi-ipmiseld 1.6.14-2.el9_2.1, freeipmi-ipmidetectd 1.6.14-2.el9_2.1, freeipmi-bmc-watchdog 1.6.14-2.el9_2.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:39010
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) freeipmi 1.6.14-2.el9_4.1, freeipmi-ipmiseld 1.6.14-2.el9_4.1, freeipmi-ipmidetectd 1.6.14-2.el9_4.1, freeipmi-bmc-watchdog 1.6.14-2.el9_4.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:39008
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) freeipmi 1.6.14-4.el10_0.1, freeipmi-ipmiseld 1.6.14-4.el10_0.1, freeipmi-ipmidetectd 1.6.14-4.el10_0.1, freeipmi-bmc-watchdog 1.6.14-4.el10_0.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:39007
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) freeipmi 1.6.14-2.el9_6.1, freeipmi-ipmiseld 1.6.14-2.el9_6.1, freeipmi-ipmidetectd 1.6.14-2.el9_6.1, freeipmi-bmc-watchdog 1.6.14-2.el9_6.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:39006
show 12 more
  • Red Hat Enterprise Linux BaseOS (v. 8) freeipmi 1.6.17-1.el8_10, freeipmi-ipmiseld 1.6.17-1.el8_10, freeipmi-ipmidetectd 1.6.17-1.el8_10, freeipmi-bmc-watchdog 1.6.17-1.el8_10
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:20579
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) freeipmi 1.6.6-1.el8_4.1, freeipmi-ipmiseld 1.6.6-1.el8_4.1, freeipmi-ipmidetectd 1.6.6-1.el8_4.1, freeipmi-bmc-watchdog 1.6.6-1.el8_4.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:50729
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) freeipmi 1.6.8-1.el8_6.1, freeipmi-ipmiseld 1.6.8-1.el8_6.1, freeipmi-ipmidetectd 1.6.8-1.el8_6.1, freeipmi-bmc-watchdog 1.6.8-1.el8_6.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:50772
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) freeipmi 1.6.8-1.el8_8.1, freeipmi-ipmiseld 1.6.8-1.el8_8.1, freeipmi-ipmidetectd 1.6.8-1.el8_8.1, freeipmi-bmc-watchdog 1.6.8-1.el8_8.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:50769
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) freeipmi 1.6.6-1.el8_4.1, freeipmi-ipmiseld 1.6.6-1.el8_4.1, freeipmi-ipmidetectd 1.6.6-1.el8_4.1, freeipmi-bmc-watchdog 1.6.6-1.el8_4.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:50729
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) freeipmi 1.6.8-1.el8_6.1, freeipmi-ipmiseld 1.6.8-1.el8_6.1, freeipmi-ipmidetectd 1.6.8-1.el8_6.1, freeipmi-bmc-watchdog 1.6.8-1.el8_6.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:50772
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) freeipmi 1.6.8-1.el8_8.1, freeipmi-ipmiseld 1.6.8-1.el8_8.1, freeipmi-ipmidetectd 1.6.8-1.el8_8.1, freeipmi-bmc-watchdog 1.6.8-1.el8_8.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:50769
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freeipmi-devel 1.6.17-1.el9_7, freeipmi-devel 1.6.17-1.el9_8, freeipmi-debuginfo 1.6.17-1.el9_7, freeipmi-debuginfo 1.6.17-1.el9_8, freeipmi-debugsource 1.6.17-1.el9_7, freeipmi-debugsource 1.6.17-1.el9_8, +6 more
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:14819
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freeipmi-devel 1.6.17-1.el10_1, freeipmi-devel 1.6.17-1.el10_2, freeipmi-debuginfo 1.6.17-1.el10_1, freeipmi-debuginfo 1.6.17-1.el10_2, freeipmi-debugsource 1.6.17-1.el10_1, freeipmi-debugsource 1.6.17-1.el10_2, +6 more
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:13515
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) freeipmi-devel 1.6.14-4.el10_0.1, freeipmi-debuginfo 1.6.14-4.el10_0.1, freeipmi-debugsource 1.6.14-4.el10_0.1, freeipmi-ipmiseld-debuginfo 1.6.14-4.el10_0.1, freeipmi-ipmidetectd-debuginfo 1.6.14-4.el10_0.1, freeipmi-bmc-watchdog-debuginfo 1.6.14-4.el10_0.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:39007
  • Red Hat Enterprise Linux CRB (v. 8) freeipmi-devel 1.6.17-1.el8_10, freeipmi-debuginfo 1.6.17-1.el8_10, freeipmi-debugsource 1.6.17-1.el8_10, freeipmi-ipmiseld-debuginfo 1.6.17-1.el8_10, freeipmi-ipmidetectd-debuginfo 1.6.17-1.el8_10, freeipmi-bmc-watchdog-debuginfo 1.6.17-1.el8_10
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:20579
  • Red Hat Enterprise Linux Server (v. 7 ELS) freeipmi 1.5.7-3.el7_9.1, freeipmi-ipmidetectd 1.5.7-3.el7_9.1, freeipmi-bmc-watchdog 1.5.7-3.el7_9.1 Red Hat Enterprise Linux Server Optional (v. 7 ELS) freeipmi-ipmiseld 1.5.7-3.el7_9.1
    fixed: vendor fix “To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.” RHSA-2026:48826

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • FreeIPMI FreeIPMI

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.