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============================================================================= FreeBSD-EN-26:01.devinfo Errata Notice
The FreeBSD Project

Topic: devinfo output formatting regression

Category: core
Module: devinfo
Announced: 2026-01-27
Affects: FreeBSD 15.0
Corrected: 2025-12-19 18:16:12 UTC (stable/15, 15.0-STABLE)
2026-01-27 19:15:45 UTC (releng/15.0, 15.0-RELEASE-p2)

For general information regarding FreeBSD Errata Notices and Security Advisories, including descriptions of the fields above, security
branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>.

I. Background

devinfo(8) is a tool to report information about devices present in a system including resources used by devices such as MMIO regions and interrupts.

libxo is a library that provides both "human-readable" and structured text output (e.g. JSON and XML).

II. Problem Description

Changes made during the development cycle of 15.0 to adapt devinfo(8) to use libxo unintentionally altered the human-readable output breaking existing tools that parsed the output.

III. Impact

This bug broke the Intel nvmupdate tool available in the sysutils/intel-nvmupdate port. There may be other utilities that are also broken.

IV. Workaround

No workaround is available.

V. Solution

Upgrade your system to a supported FreeBSD stable or release / security
branch (releng) dated after the correction date.

Perform one of the following:

1) To update your system via a binary patch:

Systems running a RELEASE version of FreeBSD on the amd64 or arm64 platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

2) To update your system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

# fetch https://security.FreeBSD.org/patches/EN-26:01/devinfo.patch
# fetch https://security.FreeBSD.org/patches/EN-26:01/devinfo.patch.asc
# gpg --verify devinfo.patch.asc

b) Apply the patch. Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile the operating system using buildworld and installworld as described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.

VI. Correction details

This issue is corrected as of the corresponding Git commit hash in the following stable and release branches:

Branch/path Hash Revision
- ------------------------------------------------------------------------- stable/15/ ed6612dea24f stable/15-n281586 releng/15.0/ 6a192c14d244 releng/15.0-n281000
- -------------------------------------------------------------------------

Run the following command to see which files were modified by a
particular commit:

# git show --stat <commit hash>

Or visit the following URL, replacing NNNNNN with the hash:

<URL:https://cgit.freebsd.org/src/commit/?id=NNNNNN>

To determine the commit count in a working tree (for comparison against
nNNNNNN in the table above), run:

# git rev-list --count --first-parent HEAD

VII. References

<URL:https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291510>

The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-26:01.devinfo.asc> -----BEGIN PGP SIGNATURE-----

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