{"id":"CVE-2026-98160","state":"PUBLISHED","title":"staging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init()\n\npadapter->HalData is allocated via vzalloc(), but incorrectly freed\nusing kfree() in the rtw_sdio_if1_init() error path. Using kfree() to\nrelease this vmalloc-backed buffer can lead to memory corruption.\n\nUse rtw_hal_data_deinit() to pair the free correctly and free\nHalData with vfree().\n\nThe bug was first flagged by an experimental static analysis tool we\nare developing for kernel memory-management bugs. Manual inspection\nconfirms that the issue is still present in current mainline.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have\nsuitable RTL8723BS SDIO hardware to test with, no runtime testing was\nable to be performed.","publishedAt":"2026-09-25T13:06:50.521Z","updatedAt":"2026-10-19T09:14:53.943Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"ff6d1ba247b5c62bdb678f1069abc86ad88a1402","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"d6158333d630a1b21d8914feaf77a6f5deb185d9","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"6c017ab2b0e1b60b5be94636c94720347213d78b","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"4520d673d49dabfd42c008a33889251025f7d6d5","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"423574feaed192063ef0cd0813fb85425f39e539","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"737c928ff5092d7e55128a232c231248fc993777","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"911190f0b9511c3c81f2f2484414c1ae26f636b3","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"264676418b726baca7be49171e306b6aa05cceb0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/os_dep/sdio_intf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/os_dep/sdio_intf.c"]}],"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"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98160.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98160","state":"PUBLISHED","datePublished":"2026-09-25T13:06:50.521Z","dateUpdated":"2026-10-19T09:14:53.943Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.321Z"},"containers":{"cna":{"title":"staging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix mismatched free of HalData in rtw_sdio_if1_init()\n\npadapter->HalData is allocated via vzalloc(), but incorrectly freed\nusing kfree() in the rtw_sdio_if1_init() error path. Using kfree() to\nrelease this vmalloc-backed buffer can lead to memory corruption.\n\nUse rtw_hal_data_deinit() to pair the free correctly and free\nHalData with vfree().\n\nThe bug was first flagged by an experimental static analysis tool we\nare developing for kernel memory-management bugs. Manual inspection\nconfirms that the issue is still present in current mainline.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have\nsuitable RTL8723BS SDIO hardware to test with, no runtime testing was\nable to be performed."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"ff6d1ba247b5c62bdb678f1069abc86ad88a1402","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"d6158333d630a1b21d8914feaf77a6f5deb185d9","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"6c017ab2b0e1b60b5be94636c94720347213d78b","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"4520d673d49dabfd42c008a33889251025f7d6d5","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"423574feaed192063ef0cd0813fb85425f39e539","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"737c928ff5092d7e55128a232c231248fc993777","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"911190f0b9511c3c81f2f2484414c1ae26f636b3","versionType":"git"},{"version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","status":"affected","lessThan":"264676418b726baca7be49171e306b6aa05cceb0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/os_dep/sdio_intf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/os_dep/sdio_intf.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ff6d1ba247b5c62bdb678f1069abc86ad88a1402"},{"url":"https://git.kernel.org/stable/c/d6158333d630a1b21d8914feaf77a6f5deb185d9"},{"url":"https://git.kernel.org/stable/c/6c017ab2b0e1b60b5be94636c94720347213d78b"},{"url":"https://git.kernel.org/stable/c/4520d673d49dabfd42c008a33889251025f7d6d5"},{"url":"https://git.kernel.org/stable/c/423574feaed192063ef0cd0813fb85425f39e539"},{"url":"https://git.kernel.org/stable/c/737c928ff5092d7e55128a232c231248fc993777"},{"url":"https://git.kernel.org/stable/c/911190f0b9511c3c81f2f2484414c1ae26f636b3"},{"url":"https://git.kernel.org/stable/c/264676418b726baca7be49171e306b6aa05cceb0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:14:53.943Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}