{"id":"AZL-66449","summary":"CVE-2025-38604 affecting package kernel for versions less than 6.6.104.2-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl818x: Kill URBs before clearing tx status queue\n\nIn rtl8187_stop() move the call of usb_kill_anchored_urbs() before clearing\nb_tx_status.queue. This change prevents callbacks from using already freed\nskb due to anchor was not killed before freeing such skb.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Not tainted 6.15.0 #8 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015\n RIP: 0010:ieee80211_tx_status_irqsafe+0x21/0xc0 [mac80211]\n Call Trace:\n  \u003cIRQ\u003e\n  rtl8187_tx_cb+0x116/0x150 [rtl8187]\n  __usb_hcd_giveback_urb+0x9d/0x120\n  usb_giveback_urb_bh+0xbb/0x140\n  process_one_work+0x19b/0x3c0\n  bh_worker+0x1a7/0x210\n  tasklet_action+0x10/0x30\n  handle_softirqs+0xf0/0x340\n  __irq_exit_rcu+0xcd/0xf0\n  common_interrupt+0x85/0xa0\n  \u003c/IRQ\u003e\n\nTested on RTL8187BvE device.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.","modified":"2026-04-01T05:20:57.992355Z","published":"2025-08-19T17:15:38Z","upstream":["CVE-2025-38604"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38604"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.104.2-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-66449.json"}}],"schema_version":"1.7.5"}