NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-KERNELHEADERS-12478617
- published3 Sept 2025
- disclosed27 Mar 2025
Introduced: 27 Mar 2025
CVE-2025-21870 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers
Other, non DAI copier widgets could have the same stream name (sname) as the ALH copier and in that case the copier->data is NULL, no alh_data is attached, which could lead to NULL pointer dereference. We could check for this NULL pointer in sof_ipc4_prepare_copier_module() and avoid the crash, but a similar loop in sof_ipc4_widget_setup_comp_dai() will miscalculate the ALH device count, causing broken audio.
The correct fix is to harden the matching logic by making sure that the
- widget is a DAI widget - so dai = w->private is valid
- the dai (and thus the copier) is ALH copier
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2355328
- https://access.redhat.com/security/cve/CVE-2025-21870
- https://git.kernel.org/stable/c/6fd60136d256b3b948333ebdb3835f41a95ab7ef
- https://git.kernel.org/stable/c/87c8768a96092ce75cd47fe076db5080db7ac515
- https://git.kernel.org/stable/c/93c6c2e5801aab09ef1ef99f248f3cd323c3f152