Medium 5.5Published Sep 25, 2026

CVE-2026-98160staging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init()

Updated under an hour ago (Oct 27, 2026, 2:50 PM ET)

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before ff6d1ba247b5c62bdb678f1069abc86ad88a1402; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before d6158333d630a1b21d8914feaf77a6f5deb185d9; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 6c017ab2b0e1b60b5be94636c94720347213d78b; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 4520d673d49dabfd42c008a33889251025f7d6d5; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 423574feaed192063ef0cd0813fb85425f39e539; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 737c928ff5092d7e55128a232c231248fc993777; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 911190f0b9511c3c81f2f2484414c1ae26f636b3; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 264676418b726baca7be49171e306b6aa05cceb0	CNA record
linux linux_kernel linux:linux_kernel	from 4.12 before 5.10.270; from 5.11 before 5.15.221; from 5.16 before 6.1.188; from 6.2 before 6.6.157; from 6.7 before 6.12.110; from 6.13 before 6.18.52; from 6.19 before 7.2.6	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.