CVE-2026-98160

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < ff6d1ba247b5c62bdb678f1069abc86ad88a1402affected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < d6158333d630a1b21d8914feaf77a6f5deb185d9affected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6c017ab2b0e1b60b5be94636c94720347213d78baffected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < 4520d673d49dabfd42c008a33889251025f7d6d5affected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < 423574feaed192063ef0cd0813fb85425f39e539affected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < 737c928ff5092d7e55128a232c231248fc993777affected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < 911190f0b9511c3c81f2f2484414c1ae26f636b3affected
LinuxLinux554c0a3abf216c991c5ebddcdb2c08689ecd290b < 264676418b726baca7be49171e306b6aa05cceb0affected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References