Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before ff6d1ba247b5c62bdb678f1069abc86ad88a1402; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before d6158333d630a1b21d8914feaf77a6f5deb185d9; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 6c017ab2b0e1b60b5be94636c94720347213d78b; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 4520d673d49dabfd42c008a33889251025f7d6d5; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 423574feaed192063ef0cd0813fb85425f39e539; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 737c928ff5092d7e55128a232c231248fc993777; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 911190f0b9511c3c81f2f2484414c1ae26f636b3; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 264676418b726baca7be49171e306b6aa05cceb0 |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ff6d1ba247b5c62bdb678f1069abc86ad88a1402
- https://git.kernel.org/stable/c/d6158333d630a1b21d8914feaf77a6f5deb185d9
- https://git.kernel.org/stable/c/6c017ab2b0e1b60b5be94636c94720347213d78b
- https://git.kernel.org/stable/c/4520d673d49dabfd42c008a33889251025f7d6d5
- https://git.kernel.org/stable/c/423574feaed192063ef0cd0813fb85425f39e539
- https://git.kernel.org/stable/c/737c928ff5092d7e55128a232c231248fc993777
- https://git.kernel.org/stable/c/911190f0b9511c3c81f2f2484414c1ae26f636b3
- https://git.kernel.org/stable/c/264676418b726baca7be49171e306b6aa05cceb0