CVE-2026-80922: crypto: qcom-rng - Allow zero as a random number

CVE-2026-80922: crypto: qcom-rng - Allow zero as a random number

[Greg Kroah-Hartman]

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

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

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

crypto: qcom-rng - Allow zero as a random number

Zero is a valid random number and needs to be allowed.  Otherwise the
output is distinguishable from random.

The Linux kernel CVE team has assigned CVE-2026-80922 to this issue.


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

	Issue introduced in 6.7 with commit f29cd5bb64c258f29b4c49452532481f50eb43ca and fixed in 6.12.108 with commit 813e6718a199befc4f26f54bdd899fbfa11515e5
	Issue introduced in 6.7 with commit f29cd5bb64c258f29b4c49452532481f50eb43ca and fixed in 6.18.49 with commit 4c0018320942003bfedd0a1c4cce3f036d363a7f
	Issue introduced in 6.7 with commit f29cd5bb64c258f29b4c49452532481f50eb43ca and fixed in 7.1.13 with commit 143c74034a1c47b0a1a64e7ca7153e7739bd1244
	Issue introduced in 6.7 with commit f29cd5bb64c258f29b4c49452532481f50eb43ca and fixed in 7.2.3 with commit 3c7101cfc52e378bcb0a46962145e39c9051dd5d
	Issue introduced in 6.7 with commit f29cd5bb64c258f29b4c49452532481f50eb43ca and fixed in 7.3-rc1 with commit 4ef04bdc0c9f98836d1638be516f6bf1bad55f69

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-2026-80922
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:
	drivers/crypto/qcom-rng.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/813e6718a199befc4f26f54bdd899fbfa11515e5
	https://git.kernel.org/stable/c/4c0018320942003bfedd0a1c4cce3f036d363a7f
	https://git.kernel.org/stable/c/143c74034a1c47b0a1a64e7ca7153e7739bd1244
	https://git.kernel.org/stable/c/3c7101cfc52e378bcb0a46962145e39c9051dd5d
	https://git.kernel.org/stable/c/4ef04bdc0c9f98836d1638be516f6bf1bad55f69