Use of Uninitialized Resource Affecting kernel-debug-modules-internal package, versions *
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-CENTOS8-KERNELDEBUGMODULESINTERNAL-21515595
- published23 Oct 2026
- disclosed18 Oct 2026
Introduced: 18 Oct 2026
NewCVE-2026-98771 (opens in a new tab)How to fix?
There is no fixed version for Centos:8 kernel-debug-modules-internal.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules-internal package and not the kernel-debug-modules-internal package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
usb: storage: sierra_ms: reject short SWoC info transfers
sierra_get_swoc_info() requests sizeof(struct swoc_info) (60) bytes from the device via usb_control_msg(), but its callers only treat a negative return value as failure. A device that answers the vendor-specific GetSwocInfo request with a short IN transfer is therefore accepted, leaving the tail of the freshly allocated (kmalloc(), non-zeroing) swoc_info buffer uninitialized.
truinst_show() subsequently prints swocInfo->rev, swocInfo->LinuxSKU and swocInfo->LinuxVer from that buffer into the world-readable (0444) "truinst" sysfs attribute. An emulated/malicious USB device (VID 0x1199, PID 0x0fff) can exploit this to disclose up to 5 bytes of stale kernel heap memory (kmalloc-64) to unprivileged userspace, once per sysfs read, indefinitely. On kernels built without init_on_alloc this leaks recently freed heap contents.
Only accept the transfer when the full structure was received. sierra_ms_init() already retries failed queries, so well-behaved devices are unaffected.
References
- https://access.redhat.com/security/cve/CVE-2026-98771
- https://git.kernel.org/stable/c/8a0200d14acd9db388b85cd016e68a4e60d900ec
- https://git.kernel.org/stable/c/c85e8331d298b8f1dee8fe63718e76435cec7133
- https://git.kernel.org/stable/c/db9d3be156baca6ef80ae5d93acfeb85c61a74dd
- https://git.kernel.org/stable/c/e2d62928f2666a2964a23b1d39e6e762f0628d7b
- https://git.kernel.org/stable/c/4faaad69f18332246bbd4ca41718beb2a305bb72