{"id":"CVE-2025-39891","summary":"wifi: mwifiex: Initialize the chan_stats array to zero","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: Initialize the chan_stats array to zero\n\nThe adapter-\u003echan_stats[] array is initialized in\nmwifiex_init_channel_scan_gap() with vmalloc(), which doesn't zero out\nmemory.  The array is filled in mwifiex_update_chan_statistics()\nand then the user can query the data in mwifiex_cfg80211_dump_survey().\n\nThere are two potential issues here.  What if the user calls\nmwifiex_cfg80211_dump_survey() before the data has been filled in.\nAlso the mwifiex_update_chan_statistics() function doesn't necessarily\ninitialize the whole array.  Since the array was not initialized at\nthe start that could result in an information leak.\n\nAlso this array is pretty small.  It's a maximum of 900 bytes so it's\nmore appropriate to use kcalloc() instead vmalloc().","modified":"2026-05-18T05:58:07.240832692Z","published":"2025-10-01T07:42:40.633Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1","openSUSE-SU-2025:20081-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39891.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/05daef0442d28350a1a0d6d0e2cab4a7a91df475"},{"type":"WEB","url":"https://git.kernel.org/stable/c/06616410a3e5e6cd1de5b7cbc668f1a7edeedad9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0e20450829ca3c1dbc2db536391537c57a40fe0b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/32c124c9c03aa755cbaf60ef7f76afd918d47659"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5285b7009dc1e09d5bb9e05fae82e1a807882dbc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9df29aa5637d94d24f7c5f054ef4feaa7b766111"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65"},{"type":"WEB","url":"https://git.kernel.org/stable/c/acdf26a912190fc6746e2a890d7d0338190527b4"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39891.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39891"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bf35443314acb43fa8a3f9f8046e14cbe178762b"},{"fixed":"9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65"},{"fixed":"05daef0442d28350a1a0d6d0e2cab4a7a91df475"},{"fixed":"acdf26a912190fc6746e2a890d7d0338190527b4"},{"fixed":"32c124c9c03aa755cbaf60ef7f76afd918d47659"},{"fixed":"9df29aa5637d94d24f7c5f054ef4feaa7b766111"},{"fixed":"06616410a3e5e6cd1de5b7cbc668f1a7edeedad9"},{"fixed":"5285b7009dc1e09d5bb9e05fae82e1a807882dbc"},{"fixed":"0e20450829ca3c1dbc2db536391537c57a40fe0b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39891.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.19.0"},{"fixed":"5.4.299"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.243"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.192"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.105"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.46"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.16.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39891.json"}}],"schema_version":"1.7.5"}