CVE-2026-80531: xfs: avoid UAF on sc->tempip in xrep_tempfile_create

CVE-2026-80531: xfs: avoid UAF on sc->tempip in xrep_tempfile_create

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

xfs: avoid UAF on sc->tempip in xrep_tempfile_create

LOLLM noticed a potential UAF if the tempfile creation code fails after
it set sc->tempip.  Fix that.

The Linux kernel CVE team has assigned CVE-2026-80531 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.10 with commit 84c14ee39dd388d73054181c70b3f42af7ddc238 and fixed in 6.12.105 with commit 08a20776ce33a2a52d856911e447c59424f0465a
	Issue introduced in 6.10 with commit 84c14ee39dd388d73054181c70b3f42af7ddc238 and fixed in 6.18.46 with commit cd1f876d1bc2e94f271e07c606cacd85b109108a
	Issue introduced in 6.10 with commit 84c14ee39dd388d73054181c70b3f42af7ddc238 and fixed in 7.1.10 with commit 96246a3200d32a43766152e56bc7ae2d93604d74
	Issue introduced in 6.10 with commit 84c14ee39dd388d73054181c70b3f42af7ddc238 and fixed in 7.2 with commit 0c88e10d12de9ca7cbed1467bb1b52310101bff8

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-80531
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	fs/xfs/scrub/tempfile.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/08a20776ce33a2a52d856911e447c59424f0465a
	https://git.kernel.org/stable/c/cd1f876d1bc2e94f271e07c606cacd85b109108a
	https://git.kernel.org/stable/c/96246a3200d32a43766152e56bc7ae2d93604d74
	https://git.kernel.org/stable/c/0c88e10d12de9ca7cbed1467bb1b52310101bff8