CVE-2026-74411

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: rtw89: Correct data type for scan index to avoid infinite loop<br /> <br /> A kernel soft lockup was observed during Wi-Fi scanning on the 6GHz band.<br /> The CPU becomes stuck in rtw89_hw_scan_add_chan_ax for over 20 seconds,<br /> leading to a system panic.<br /> <br /> RIP points to 0f b6 c3 (movzbl %bl, %eax), which zero-extends<br /> the low 8 bits of RBX into RAX.<br /> RBX (the counter i) has reached a huge value: 0x137466a1.<br /> <br /> watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [kworker/u16:4:6124]<br /> Workqueue: events_unbound cfg80211_wiphy_work [cfg80211]<br /> RIP: 0010:rtw89_hw_scan_add_chan_ax+0xb3/0x6e0 [rtw89_core]<br /> Code: a0 48 89 45 a8 44 89 6d 9c 44 89 75 98 eb 29 66 66 2e 0f 1f<br /> 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 c3 01<br /> b6 c3 41 3b 44 24 74 0f 83 0b 02 00 00 0f b6 c3 48 8d 14 80 49<br /> RSP: 0018:ffffcb48cbaa39f8 EFLAGS: 00000202<br /> RAX: 0000000000000005 RBX: 00000000137466a1 RCX: 0000000000000000<br /> RDX: ffff89ffc9d851a8 RSI: 0000000000004f0d RDI: 0000000096af0130<br /> RBP: ffffcb48cbaa3a60 R08: 0000000000000000 R09: ffff8a00b7502080<br /> R10: ffff8a00b75ff600 R11: 0000000000000000 R12: ffff89ffc7553870<br /> R13: ffff8a00b7ac8f19 R14: ffff8a00b75020d8 R15: ffff89ffc3d54d80<br /> FS: 0000000000000000(0000) GS:ffff8a014f962000(0000)<br /> knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 00007558d7f9f4c4 CR3: 0000000178040001 CR4: 00000000001706f0<br /> Call Trace:<br /> <br /> rtw89_hw_scan_prep_chan_list_ax+0x8a/0x400 [rtw89_core]<br /> rtw89_hw_scan_start+0x546/0x8a0 [rtw89_core]<br /> ? rtw89_fw_h2c_default_cmac_tbl+0x13c/0x1f0 [rtw89_core]<br /> rtw89_ops_hw_scan+0xae/0x120 [rtw89_core]<br /> drv_hw_scan+0xbb/0x180 [mac80211]<br /> __ieee80211_start_scan+0x2fc/0x750 [mac80211]<br /> ieee80211_request_scan+0xe/0x20 [mac80211]<br /> ieee80211_scan+0x123/0x190 [mac80211]<br /> rdev_scan+0x40/0x110 [cfg80211]<br /> cfg80211_scan_6ghz+0x5a1/0xa30 [cfg80211]<br /> <br /> By objdump with source:<br /> <br /> for (i = 0; i n_6ghz_params; i++) {<br /> 5fbc0: 83 c3 01 add $0x1,%ebx --&gt; i++<br /> 5fbc3: 0f b6 c3 movzbl %bl,%eax --&gt; get counter<br /> fbc6: 41 3b 44 24 74 cmp 0x74(%r12),%eax<br /> <br /> * RBX: 00000000137466a1 -&gt; %bl = a1 -&gt; EAX = 000000a1 (161)