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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: update channel list in reg notifier instead reg worker\n\nCurrently when ath11k gets a new channel list, it will be processed\naccording to the following steps:\n1. update new channel list to cfg80211 and queue reg_work.\n2. cfg80211 handles new channel list during reg_work.\n3. update cfg80211\u0027s handled channel list to firmware by\nath11k_reg_update_chan_list().\n\nBut ath11k will immediately execute step 3 after reg_work is just\nqueued. Since step 2 is asynchronous, cfg80211 may not have completed\nhandling the new channel list, which may leading to an out-of-bounds\nwrite error:\nBUG: KASAN: slab-out-of-bounds in ath11k_reg_update_chan_list\nCall Trace:\n    ath11k_reg_update_chan_list+0xbfe/0xfe0 [ath11k]\n    kfree+0x109/0x3a0\n    ath11k_regd_update+0x1cf/0x350 [ath11k]\n    ath11k_regd_update_work+0x14/0x20 [ath11k]\n    process_one_work+0xe35/0x14c0\n\nShould ensure step 2 is completely done before executing step 3. Thus\nWen raised patch[1]. When flag NL80211_REGDOM_SET_BY_DRIVER is set,\ncfg80211 will notify ath11k after step 2 is done.\n\nSo enable the flag NL80211_REGDOM_SET_BY_DRIVER then cfg80211 will\nnotify ath11k after step 2 is done. At this time, there will be no\nKASAN bug during the execution of the step 3.\n\n[1] https://patchwork.kernel.org/project/linux-wireless/patch/20230201065313.27203-1-quic_wgong@quicinc.com/\n\nTested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3"
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            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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              "value": "AV:A - The trigger is an 802.11d Country IE in beacons/probe responses harvested by the firmware\u0027s periodic 11d offload scan, which drives `WMI_11D_NEW_COUNTRY_EVENTID` \u2192 `ath11k_reg_set_cc()` \u2192 `WMI_REG_CHAN_LIST_CC_EVENTID` \u2192 `ath11k_regd_update_work`. This requires only RF proximity to the victim\u0027s Wi-Fi radio, matching the adjacent-network scope for Wi-Fi frame injection.\nAC:L - The attacker initiates both racing workers with a single beaconed country change \u2014 `ath11k_regd_update_work` on the ath11k workqueue and cfg80211\u0027s `reg_work` on the system workqueue \u2014 and the window is widened by the sleeping `kzalloc(GFP_KERNEL)` and per-channel `ath11k_dbg()` calls between the counting and filling loops. Since 11d scans repeat on a fixed interval and the attacker can toggle the advertised country indefinitely, the race can be retried until won.\nPR:N - No credentials, association, or authentication are needed \u2014 the firmware\u0027s 11d scan ingests Country IEs from unassociated broadcast beacons of any AP in range. No local account on the victim is involved at any point in the path.\nUI:N - A station interface that is simply up and scanning (the normal state for a laptop, phone, or embedded client) runs the 11d scan automatically; no user action such as connecting to the rogue AP is required. The regdomain update and the racing workers are entirely kernel-internal once the beacon is received.\nS:U - The out-of-bounds write corrupts kernel slab memory adjacent to the `scan_chan_list_params` allocation, staying within the kernel\u0027s own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - A heap out-of-bounds write of up to ~1\u20132 KB of `struct channel_param` records overwrites adjacent slab objects, which can be groomed (e.g. onto neighboring length or pointer fields) to yield an information-disclosure primitive. Per kernel scoring guidance, memory corruption that can be leveraged for disclosure rates High.\nI:H - This is a genuine slab out-of-bounds write with attacker-influenced length (via race timing over which bands cfg80211 has re-enabled) and partially attacker-influenced contents (`mhz`, `cfreq1`, `maxpower`, `maxregpower`, `antennamax` derived from the attacker-chosen regdomain). Out-of-bounds writes into adjacent heap objects are a standard route to control-flow hijack and rate High.\nA:H - The bug was found as a KASAN slab-out-of-bounds report followed by heap corruption at `kfree()`, which reliably produces oopses/panics on hardened or SLUB-debug kernels and unpredictable kernel state otherwise. Any such crash of the kernel is a full availability loss."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Fix null-ptr-deref by sock_lock_init_class_and_name() and rmmod.\n\nWhen I ran the repro [0] and waited a few seconds, I observed two\nLOCKDEP splats: a warning immediately followed by a null-ptr-deref. [1]\n\nReproduction Steps:\n\n  1) Mount CIFS\n  2) Add an iptables rule to drop incoming FIN packets for CIFS\n  3) Unmount CIFS\n  4) Unload the CIFS module\n  5) Remove the iptables rule\n\nAt step 3), the CIFS module calls sock_release() for the underlying\nTCP socket, and it returns quickly.  However, the socket remains in\nFIN_WAIT_1 because incoming FIN packets are dropped.\n\nAt this point, the module\u0027s refcnt is 0 while the socket is still\nalive, so the following rmmod command succeeds.\n\n  # ss -tan\n  State      Recv-Q Send-Q Local Address:Port  Peer Address:Port\n  FIN-WAIT-1 0      477        10.0.2.15:51062   10.0.0.137:445\n\n  # lsmod | grep cifs\n  cifs                 1159168  0\n\nThis highlights a discrepancy between the lifetime of the CIFS module\nand the underlying TCP socket.  Even after CIFS calls sock_release()\nand it returns, the TCP socket does not die immediately in order to\nclose the connection gracefully.\n\nWhile this is generally fine, it causes an issue with LOCKDEP because\nCIFS assigns a different lock class to the TCP socket\u0027s sk-\u003esk_lock\nusing sock_lock_init_class_and_name().\n\nOnce an incoming packet is processed for the socket or a timer fires,\nsk-\u003esk_lock is acquired.\n\nThen, LOCKDEP checks the lock context in check_wait_context(), where\nhlock_class() is called to retrieve the lock class.  However, since\nthe module has already been unloaded, hlock_class() logs a warning\nand returns NULL, triggering the null-ptr-deref.\n\nIf LOCKDEP is enabled, we must ensure that a module calling\nsock_lock_init_class_and_name() (CIFS, NFS, etc) cannot be unloaded\nwhile such a socket is still alive to prevent this issue.\n\nLet\u0027s hold the module reference in sock_lock_init_class_and_name()\nand release it when the socket is freed in sk_prot_free().\n\nNote that sock_lock_init() clears sk-\u003esk_owner for svc_create_socket()\nthat calls sock_lock_init_class_and_name() for a listening socket,\nwhich clones a socket by sk_clone_lock() without GFP_ZERO.\n\n[0]:\nCIFS_SERVER=\"10.0.0.137\"\nCIFS_PATH=\"//${CIFS_SERVER}/Users/Administrator/Desktop/CIFS_TEST\"\nDEV=\"enp0s3\"\nCRED=\"/root/WindowsCredential.txt\"\n\nMNT=$(mktemp -d /tmp/XXXXXX)\nmount -t cifs ${CIFS_PATH} ${MNT} -o vers=3.0,credentials=${CRED},cache=none,echo_interval=1\n\niptables -A INPUT -s ${CIFS_SERVER} -j DROP\n\nfor i in $(seq 10);\ndo\n    umount ${MNT}\n    rmmod cifs\n    sleep 1\ndone\n\nrm -r ${MNT}\n\niptables -D INPUT -s ${CIFS_SERVER} -j DROP\n\n[1]:\nDEBUG_LOCKS_WARN_ON(1)\nWARNING: CPU: 10 PID: 0 at kernel/locking/lockdep.c:234 hlock_class (kernel/locking/lockdep.c:234 kernel/locking/lockdep.c:223)\nModules linked in: cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs]\nCPU: 10 UID: 0 PID: 0 Comm: swapper/10 Not tainted 6.14.0 #36\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nRIP: 0010:hlock_class (kernel/locking/lockdep.c:234 kernel/locking/lockdep.c:223)\n...\nCall Trace:\n \u003cIRQ\u003e\n __lock_acquire (kernel/locking/lockdep.c:4853 kernel/locking/lockdep.c:5178)\n lock_acquire (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853 kernel/locking/lockdep.c:5816)\n _raw_spin_lock_nested (kernel/locking/spinlock.c:379)\n tcp_v4_rcv (./include/linux/skbuff.h:1678 ./include/net/tcp.h:2547 net/ipv4/tcp_ipv4.c:2350)\n...\n\nBUG: kernel NULL pointer dereference, address: 00000000000000c4\n PF: supervisor read access in kernel mode\n PF: error_code(0x0000) - not-present page\nPGD 0\nOops: Oops: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 10 UID: 0 PID: 0 Comm: swapper/10 Tainted: G        W          6.14.0 #36\nTainted: [W]=WARN\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__lock_acquire (kernel/\n---truncated---"
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