linux-cve-announce - CVE-2025-37963: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users

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Message-ID: <2025052005-CVE-2025-37963-60f2@gregkh>
Date: Tue, 20 May 2025 18:02:17 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37963: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users

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

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

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

arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users

Support for eBPF programs loaded by unprivileged users is typically
disabled. This means only cBPF programs need to be mitigated for BHB.

In addition, only mitigate cBPF programs that were loaded by an
unprivileged user. Privileged users can also load the same program
via eBPF, making the mitigation pointless.

The Linux kernel CVE team has assigned CVE-2025-37963 to this issue.


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

	Fixed in 6.1.139 with commit 6e52d043f7dbf1839a24a3fab2b12b0d3839de7a
	Fixed in 6.6.91 with commit 80251f62028f1ab2e09be5ca3123f84e8b00389a
	Fixed in 6.12.29 with commit e5f5100f1c64ac6c72671b2cf6b46542fce93706
	Fixed in 6.14.7 with commit 477481c4348268136227348984b6699d6370b685
	Fixed in 6.15-rc7 with commit f300769ead032513a68e4a02e806393402e626f8

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-2025-37963
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:
	arch/arm64/net/bpf_jit_comp.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/6e52d043f7dbf1839a24a3fab2b12b0d3839de7a
	https://git.kernel.org/stable/c/80251f62028f1ab2e09be5ca3123f84e8b00389a
	https://git.kernel.org/stable/c/e5f5100f1c64ac6c72671b2cf6b46542fce93706
	https://git.kernel.org/stable/c/477481c4348268136227348984b6699d6370b685
	https://git.kernel.org/stable/c/f300769ead032513a68e4a02e806393402e626f8