{"id":"CVE-2026-43213","title":"wifi: rtw89: pci: validate sequence number of TX release report","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: validate sequence number of TX release report\n\nHardware rarely reports abnormal sequence number in TX release report,\nwhich will access out-of-bounds …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < ef7fa19809b2d892d45da53f90ac698d13c367fd","Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < b342dd13aedccb0dd27365f6cc63a262f42394ce","Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < 957eda596c7665f2966970fd1dcc35fe299b38e8","Linux 5.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:15:48.810008Z"},"published":"2026-05-06","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:20:36.820Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43213","references":[{"url":"https://git.kernel.org/stable/c/ef7fa19809b2d892d45da53f90ac698d13c367fd"},{"url":"https://git.kernel.org/stable/c/b342dd13aedccb0dd27365f6cc63a262f42394ce"},{"url":"https://git.kernel.org/stable/c/957eda596c7665f2966970fd1dcc35fe299b38e8"}],"tags":["cve.org"],"epss":0.00325,"epssPercentile":0.23949,"ingestedAt":"2026-10-16T17:24:46.687Z","slug":"CVE-2026-43213","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: validate sequence number of TX release report\n\nHardware rarely reports abnormal sequence number in TX release report,\nwhich will access out-of-bounds of wd_ring->pages array, causing NULL\npointer dereference.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\n  CPU: 1 PID: 1085 Comm: irq/129-rtw89_p Tainted: G S   U\n             6.1.145-17510-g2f3369c91536 #1 (HASH:69e8 1)\n  Call Trace:\n   <IRQ>\n   rtw89_pci_release_tx+0x18f/0x300 [rtw89_pci (HASH:4c83 2)]\n   rtw89_pci_napi_poll+0xc2/0x190 [rtw89_pci (HASH:4c83 2)]\n   net_rx_action+0xfc/0x460 net/core/dev.c:6578 net/core/dev.c:6645 net/core/dev.c:6759\n   handle_softirqs+0xbe/0x290 kernel/softirq.c:601\n   ? rtw89_pci_interrupt_threadfn+0xc5/0x350 [rtw89_pci (HASH:4c83 2)]\n   __local_bh_enable_ip+0xeb/0x120 kernel/softirq.c:499 kernel/softirq.c:423\n   </IRQ>\n   <TASK>\n   rtw89_pci_interrupt_threadfn+0xf8/0x350 [rtw89_pci (HASH:4c83 2)]\n   ? irq_thread+0xa7/0x340 kernel/irq/manage.c:0\n   irq_thread+0x177/0x340 kernel/irq/manage.c:1205 kernel/irq/manage.c:1314\n   ? thaw_kernel_threads+0xb0/0xb0 kernel/irq/manage.c:1202\n   ? irq_forced_thread_fn+0x80/0x80 kernel/irq/manage.c:1220\n   kthread+0xea/0x110 kernel/kthread.c:376\n   ? synchronize_irq+0x1a0/0x1a0 kernel/irq/manage.c:1287\n   ? kthread_associate_blkcg+0x80/0x80 kernel/kthread.c:331\n   ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n   </TASK>\n\nTo prevent crash, validate rpp_info.seq before using.\n\n## Affected\n\n- `Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < ef7fa19809b2d892d45da53f90ac698d13c367fd`\n- `Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < b342dd13aedccb0dd27365f6cc63a262f42394ce`\n- `Linux >= e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd < 957eda596c7665f2966970fd1dcc35fe299b38e8`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}