{"id":"CVE-2024-26896","summary":"wifi: wfx: fix memory leak when starting AP","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wfx: fix memory leak when starting AP\n\nKmemleak reported this error:\n\n    unreferenced object 0xd73d1180 (size 184):\n      comm \"wpa_supplicant\", pid 1559, jiffies 13006305 (age 964.245s)\n      hex dump (first 32 bytes):\n        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n        00 00 00 00 00 00 00 00 1e 00 01 00 00 00 00 00  ................\n      backtrace:\n        [\u003c5ca11420\u003e] kmem_cache_alloc+0x20c/0x5ac\n        [\u003c127bdd74\u003e] __alloc_skb+0x144/0x170\n        [\u003cfb8a5e38\u003e] __netdev_alloc_skb+0x50/0x180\n        [\u003c0f9fa1d5\u003e] __ieee80211_beacon_get+0x290/0x4d4 [mac80211]\n        [\u003c7accd02d\u003e] ieee80211_beacon_get_tim+0x54/0x18c [mac80211]\n        [\u003c41e25cc3\u003e] wfx_start_ap+0xc8/0x234 [wfx]\n        [\u003c93a70356\u003e] ieee80211_start_ap+0x404/0x6b4 [mac80211]\n        [\u003ca4a661cd\u003e] nl80211_start_ap+0x76c/0x9e0 [cfg80211]\n        [\u003c47bd8b68\u003e] genl_rcv_msg+0x198/0x378\n        [\u003c453ef796\u003e] netlink_rcv_skb+0xd0/0x130\n        [\u003c6b7c977a\u003e] genl_rcv+0x34/0x44\n        [\u003c66b2d04d\u003e] netlink_unicast+0x1b4/0x258\n        [\u003cf965b9b6\u003e] netlink_sendmsg+0x1e8/0x428\n        [\u003caadb8231\u003e] ____sys_sendmsg+0x1e0/0x274\n        [\u003cd2b5212d\u003e] ___sys_sendmsg+0x80/0xb4\n        [\u003c69954f45\u003e] __sys_sendmsg+0x64/0xa8\n    unreferenced object 0xce087000 (size 1024):\n      comm \"wpa_supplicant\", pid 1559, jiffies 13006305 (age 964.246s)\n      hex dump (first 32 bytes):\n        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n        10 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00  ...@............\n      backtrace:\n        [\u003c9a993714\u003e] __kmalloc_track_caller+0x230/0x600\n        [\u003cf83ea192\u003e] kmalloc_reserve.constprop.0+0x30/0x74\n        [\u003ca2c61343\u003e] __alloc_skb+0xa0/0x170\n        [\u003cfb8a5e38\u003e] __netdev_alloc_skb+0x50/0x180\n        [\u003c0f9fa1d5\u003e] __ieee80211_beacon_get+0x290/0x4d4 [mac80211]\n        [\u003c7accd02d\u003e] ieee80211_beacon_get_tim+0x54/0x18c [mac80211]\n        [\u003c41e25cc3\u003e] wfx_start_ap+0xc8/0x234 [wfx]\n        [\u003c93a70356\u003e] ieee80211_start_ap+0x404/0x6b4 [mac80211]\n        [\u003ca4a661cd\u003e] nl80211_start_ap+0x76c/0x9e0 [cfg80211]\n        [\u003c47bd8b68\u003e] genl_rcv_msg+0x198/0x378\n        [\u003c453ef796\u003e] netlink_rcv_skb+0xd0/0x130\n        [\u003c6b7c977a\u003e] genl_rcv+0x34/0x44\n        [\u003c66b2d04d\u003e] netlink_unicast+0x1b4/0x258\n        [\u003cf965b9b6\u003e] netlink_sendmsg+0x1e8/0x428\n        [\u003caadb8231\u003e] ____sys_sendmsg+0x1e0/0x274\n        [\u003cd2b5212d\u003e] ___sys_sendmsg+0x80/0xb4\n\nHowever, since the kernel is build optimized, it seems the stack is not\naccurate. It appears the issue is related to wfx_set_mfp_ap(). The issue\nis obvious in this function: memory allocated by ieee80211_beacon_get()\nis never released. Fixing this leak makes kmemleak happy.","modified":"2026-04-02T10:06:22.108898Z","published":"2024-04-17T10:27:47.214Z","related":["SUSE-SU-2024:1644-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26896.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/12f00a367b2b62756e0396f14b54c2c15524e1c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a71ec74e5e3478d202a1874f085ca3ef40be49b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1f57a0127b89a6b6620514564aa7eaec16d9af3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b8cfb7c819dd39965136a66fe3a7fde688d976fc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dadbb5d29d6c5f571a50272fce8c1505a9559487"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26896.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26896"},{"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":"268bceec1684932e194ae87877dcc73f534d921c"},{"fixed":"a1f57a0127b89a6b6620514564aa7eaec16d9af3"},{"fixed":"3a71ec74e5e3478d202a1874f085ca3ef40be49b"},{"fixed":"12f00a367b2b62756e0396f14b54c2c15524e1c3"},{"fixed":"dadbb5d29d6c5f571a50272fce8c1505a9559487"},{"fixed":"b8cfb7c819dd39965136a66fe3a7fde688d976fc"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26896.json"}}],"schema_version":"1.7.5"}