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Vulnerability record · CVE-2026-98160 · published 25 September 2026

CVE-2026-98160: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init() padapter->HalData is allocated via vzalloc(), but incorrectly freed using kfree() in the rtw_sdio_if1_init() error path. Using kfree() to release this vmalloc-backed buffer can lead to memory corruption. Use rtw_hal_data_deinit() to pair the free correctly and free HalData with vfree(). The bug was first flagged by an experimental static analysis tool we are developing for kernel memory-management bugs. Manual inspection confirms that the issue is still present in current mainline. An x86_64 allyesconfig build showed no new warnings. As we do not have suitable RTL8723BS SDIO hardware to test with, no runtime testing was able to be performed.

5.5 CVSS 3.1 Medium EPSS 0.11% · top 98.5% CWE-763 · CWE-763
5.5CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
19 Oct 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init() padapter->HalData is allocated via vzalloc(), but incorrectly freed using kfree() in the rtw_sdio_if1_init() error path. Using kfree() to release this vmalloc-backed buffer can lead to memory corruption. Use rtw_hal_data_deinit() to pair the free correctly and free HalData with vfree(). The bug was first flagged by an experimental static analysis tool we are developing for kernel memory-management bugs. Manual inspection confirms that the issue is still present in current mainline. An x86_64 allyesconfig build showed no new warnings. As we do not have suitable RTL8723BS SDIO hardware to test with, no runtime testing was able to be performed.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/264676418b726baca7be49171e306b6aa05cceb0 Patch
https://git.kernel.org/stable/c/423574feaed192063ef0cd0813fb85425f39e539 Patch
https://git.kernel.org/stable/c/4520d673d49dabfd42c008a33889251025f7d6d5 Patch
https://git.kernel.org/stable/c/6c017ab2b0e1b60b5be94636c94720347213d78b Patch
https://git.kernel.org/stable/c/737c928ff5092d7e55128a232c231248fc993777 Patch
https://git.kernel.org/stable/c/911190f0b9511c3c81f2f2484414c1ae26f636b3 Patch
https://git.kernel.org/stable/c/d6158333d630a1b21d8914feaf77a6f5deb185d9 Patch
https://git.kernel.org/stable/c/ff6d1ba247b5c62bdb678f1069abc86ad88a1402 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-98160), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.