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    <lastBuildDate>Sat, 17 Oct 2026 21:05:54 +0000</lastBuildDate>
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      <title>CVE-2026-98307 — wifi: ath11k: cleanup arsta in ath11k_mac_peer_cleanup_all()</title>
      <link>https://db.gcve.eu/vuln/cve-2026-98307</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;wifi: ath11k: cleanup arsta in ath11k_mac_peer_cleanup_all()&lt;/p&gt;
&lt;p&gt;When mac80211 removes a sta, it calls .sta_state() which in turn calls
ath11k_mac_station_remove(). In that function we clean up both peers &amp;amp;
arsta related resources.&lt;/p&gt;
&lt;p&gt;But when the firmware crashes, ath11k calls ieee80211_restart_hw(), which
assumes that all driver related resources are cleaned up beforehand. This
cleanup is supposedly done by ath11k_mac_peer_cleanup_all() but does not
in fact free arsta-&amp;gt;rx_stats / tx_stats.&lt;/p&gt;
&lt;p&gt;Extract the arsta cleanup from ath11k_mac_station_remove() into a
new ath11k_mac_station_cleanup() and call it from both there and
ath11k_mac_peer_cleanup_all().&lt;/p&gt;
&lt;p&gt;This should handle kmemleaks reports like:
	unreferenced object 0xffffff801ae66400 (size 1024):
	  comm &amp;#34;hostapd&amp;#34;, pid 1306, jiffies 4295011565
	  hex dump (first 32 bytes):
	    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	  backtrace (crc d61c08ec):
	    kmemleak_alloc+0x3c/0x50
	    __kmalloc_cache_noprof+0x2b0/0x3e0
	    ath11k_mac_op_sta_state+0x1dc/0xb10
	    drv_sta_state+0xac/0x6f8
	    sta_info_insert_rcu+0x314/0x5e0
	    sta_info_insert+0x14/0x38
	    ieee80211_add_station+0x10c/0x1a0
	    nl80211_new_station+0x3e8/0x680
	    genl_family_rcv_msg_doit+0xc0/0x120
	    genl_rcv_msg+0x1b4/0x258
	    netlink_rcv_skb+0x4c/0x108
	    genl_rcv+0x38/0x60
	    netlink_unic…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;wifi: ath11k: cleanup arsta in ath11k_mac_peer_cleanup_all()&lt;/p&gt;
&lt;p&gt;When mac80211 removes a sta, it calls .sta_state() which in turn calls
ath11k_mac_station_remove(). In that function we clean up both peers &amp;amp;
arsta related resources.&lt;/p&gt;
&lt;p&gt;But when the firmware crashes, ath11k calls ieee80211_restart_hw(), which
assumes that all driver related resources are cleaned up beforehand. This
cleanup is supposedly done by ath11k_mac_peer_cleanup_all() but does not
in fact free arsta-&amp;gt;rx_stats / tx_stats.&lt;/p&gt;
&lt;p&gt;Extract the arsta cleanup from ath11k_mac_station_remove() into a
new ath11k_mac_station_cleanup() and call it from both there and
ath11k_mac_peer_cleanup_all().&lt;/p&gt;
&lt;p&gt;This should handle kmemleaks reports like:
	unreferenced object 0xffffff801ae66400 (size 1024):
	  comm &amp;#34;hostapd&amp;#34;, pid 1306, jiffies 4295011565
	  hex dump (first 32 bytes):
	    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	  backtrace (crc d61c08ec):
	    kmemleak_alloc+0x3c/0x50
	    __kmalloc_cache_noprof+0x2b0/0x3e0
	    ath11k_mac_op_sta_state+0x1dc/0xb10
	    drv_sta_state+0xac/0x6f8
	    sta_info_insert_rcu+0x314/0x5e0
	    sta_info_insert+0x14/0x38
	    ieee80211_add_station+0x10c/0x1a0
	    nl80211_new_station+0x3e8/0x680
	    genl_family_rcv_msg_doit+0xc0/0x120
	    genl_rcv_msg+0x1b4/0x258
	    netlink_rcv_skb+0x4c/0x108
	    genl_rcv+0x38/0x60
	    netlink_unic…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2026-98307</guid>
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