{"id":"CVE-2026-74411","revision":"7c32f172c2454fbcb250778e2b1ea832","records":[{"revision":"7c32f172c2454fbcb250778e2b1ea832","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74411","aliases":[],"title":"wifi: rtw89: Correct data type for scan index to avoid infinite loop","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: Correct data type for scan index to avoid infinite loop\n\nA kernel soft lockup was observed during Wi-Fi scanning on the 6GHz band.\nThe CPU becomes stuck in rtw89_hw_scan_add_chan_ax for over 20 seconds,\nleading to a system panic.\n\nRIP points to 0f b6 c3 (movzbl %bl, %eax), which zero-extends\nthe low 8 bits of RBX into RAX.\nRBX (the counter i) has reached a huge value: 0x137466a1.\n\n watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [kworker/u16:4:6124]\n Workqueue: events_unbound cfg80211_wiphy_work [cfg80211]\n RIP: 0010:rtw89_hw_scan_add_chan_ax+0xb3/0x6e0 [rtw89_core]\n Code: a0 48 89 45 a8 44 89 6d 9c 44 89 75 98 eb 29 66 66 2e 0f 1f\n 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 c3 01\n <0f> b6 c3 41 3b 44 24 74 0f 83 0b 02 00 00 0f b6 c3 48 8d 14 80 49\n RSP: 0018:ffffcb48cbaa39f8 EFLAGS: 00000202\n RAX: 0000000000000005 RBX: 00000000137466a1 RCX: 0000000000000000\n RDX: ffff89ffc9d851a8 RSI: 0000000000004f0d RDI: 0000000096af0130\n RBP: ffffcb48cbaa3a60 R08: 0000000000000000 R09: ffff8a00b7502080\n R10: ffff8a00b75ff600 R11: 0000000000000000 R12: ffff89ffc7553870\n R13: ffff8a00b7ac8f19 R14: ffff8a00b75020d8 R15: ffff89ffc3d54d80\n FS: 0000000000000000(0000) GS:ffff8a014f962000(0000)\n knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007558d7f9f4c4 CR3: 0000000178040001 CR4: 00000000001706f0\n Call Trace:\n \n rtw89_hw_scan_prep_chan_list_ax+0x8a/0x400 [rtw89_core]\n rtw89_hw_scan_start+0x546/0x8a0 [rtw89_core]\n ? rtw89_fw_h2c_default_cmac_tbl+0x13c/0x1f0 [rtw89_core]\n rtw89_ops_hw_scan+0xae/0x120 [rtw89_core]\n drv_hw_scan+0xbb/0x180 [mac80211]\n __ieee80211_start_scan+0x2fc/0x750 [mac80211]\n ieee80211_request_scan+0xe/0x20 [mac80211]\n ieee80211_scan+0x123/0x190 [mac80211]\n rdev_scan+0x40/0x110 [cfg80211]\n cfg80211_scan_6ghz+0x5a1/0xa30 [cfg80211]\n\nBy objdump with source:\n\n\tfor (i = 0; i < req->n_6ghz_params; i++) {\n 5fbc0:\t83 c3 01 \tadd $0x1,%ebx --> i++\n 5fbc3:\t0f b6 c3 \tmovzbl %bl,%eax --> get counter\n fbc6:\t41 3b 44 24 74 \tcmp 0x74(%r12),%eax\n\n * RBX: 00000000137466a1 -> %bl = a1 -> EAX = 000000a1 (161)","state":0,"publishedAt":"2026-08-15T05:59:18.696+00:00","modifiedAt":"2026-10-16T19:05:44.122+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/wireless/realtek/rtw89/fw.c\"\n ],\n \"versions\": [\n {\n \"version\": \"c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0\",\n \"lessThan\": \"966fbed4b4463fbcb49c5becf3f86eae776861bd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0\",\n \"lessThan\": \"05d46e30303275f21f13c951166d39c85df976d4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0\",\n \"lessThan\": \"7a1ab5fdcae896e20ca6d68fa0fbd2816cb7471f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0\",\n \"lessThan\": \"140fa699cfd0e18ab2f1497acd951fb3548610f5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0\",\n \"lessThan\": \"08fdcb529df6df3562dd2b0035f88dd5be8b3c68\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/wireless/realtek/rtw89/fw.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.4\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.4\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.145\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.97\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.40\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.5\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/966fbed4b4463fbcb49c5becf3f86eae776861bd","https://git.kernel.org/stable/c/05d46e30303275f21f13c951166d39c85df976d4","https://git.kernel.org/stable/c/7a1ab5fdcae896e20ca6d68fa0fbd2816cb7471f","https://git.kernel.org/stable/c/140fa699cfd0e18ab2f1497acd951fb3548610f5","https://git.kernel.org/stable/c/08fdcb529df6df3562dd2b0035f88dd5be8b3c68"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74411","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74411","identifiers":["CVE-2026-74411"]},"retained":false,"historicalAffected":[]}],"coverage":[]}