{"id":"CVE-2026-74650","summary":"staging: rtl8723bs: fix OOB read in WMM_param_handler()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in WMM_param_handler()\n\nWMM_param_handler() copies a fixed-size WMM parameter element out of a\nreceived information element without checking that the element is long\nenough, causing an out-of-bounds read for a short WMM IE.\n\nThe handler reads sizeof(struct WMM_para_element) (18) bytes at\npIE-\u003edata + 6, so it requires pIE-\u003elength to be at least 24\n(WLAN_WMM_LEN), but it never validates the length. Two of its three\ncallers reach it after matching only the WMM OUI: OnAssocRsp() in\nrtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a\n4-byte OUI, before calling the handler. A vendor-specific IE carrying\nthe WMM OUI but a length between 6 and 23, placed in an association\nresponse or in the IE blob handed to join_cmd_hdl(), passes the OUI\ncheck and then makes the memcmp() and memcpy() at pIE-\u003edata + 6 read\npast the end of the element. OnAssocRsp() parses a frame received from\nthe AP, so this is reachable from a remote peer.\n\nThe remaining caller in rtw_wlan_util.c already guards the handler with\n\"pIE-\u003elength == WLAN_WMM_LEN\". Move the equivalent check into the\nhandler itself so every caller is covered; the sibling IE handlers in\nthe same parsing loop (HT_caps_handler(), HT_info_handler(),\nERP_IE_handler()) likewise bound their accesses by pIE-\u003elength.","modified":"2026-08-28T03:47:13.129824983Z","published":"2026-08-22T15:32:26.333Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74650.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1158b9931207392d6dd136aa0c4be18893b50fa1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2bee6f7a0f0125238951e31da2e96d06fe359043"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5df2fd06567df5f178c8faae0bdaefd203618d21"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae21407350151bddfd4fea7aa39bd0643c0ca9d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ce2399717de242344880044b91a20a712644fdfb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5b7610008f4e6a80c8b071aa77ddbd5e17ea472"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74650.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74650"},{"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":"554c0a3abf216c991c5ebddcdb2c08689ecd290b"},{"fixed":"5df2fd06567df5f178c8faae0bdaefd203618d21"},{"fixed":"6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93"},{"fixed":"2bee6f7a0f0125238951e31da2e96d06fe359043"},{"fixed":"1158b9931207392d6dd136aa0c4be18893b50fa1"},{"fixed":"ce2399717de242344880044b91a20a712644fdfb"},{"fixed":"e5b7610008f4e6a80c8b071aa77ddbd5e17ea472"},{"fixed":"e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4"},{"fixed":"ae21407350151bddfd4fea7aa39bd0643c0ca9d3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74650.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"5.10.267"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74650.json"}}],"schema_version":"1.9.0"}