{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49471","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T02:08:31.579Z","datePublished":"2025-02-26T02:13:14.657Z","dateUpdated":"2026-08-05T08:55:19.284Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:55:19.284Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtw89: cfo: check mac_id to avoid out-of-bounds\n\nSomehow, hardware reports incorrect mac_id and pollute memory. Check index\nbefore we access the array.\n\n  UBSAN: array-index-out-of-bounds in rtw89/phy.c:2517:23\n  index 188 is out of range for type 's32 [64]'\n  CPU: 1 PID: 51550 Comm: irq/35-rtw89_pc Tainted: G           OE\n  Call Trace:\n   <IRQ>\n   show_stack+0x52/0x58\n   dump_stack_lvl+0x4c/0x63\n   dump_stack+0x10/0x12\n   ubsan_epilogue+0x9/0x45\n   __ubsan_handle_out_of_bounds.cold+0x44/0x49\n   ? __alloc_skb+0x92/0x1d0\n   rtw89_phy_cfo_parse+0x44/0x7f [rtw89_core]\n   rtw89_core_rx+0x261/0x871 [rtw89_core]\n   ? __alloc_skb+0xee/0x1d0\n   rtw89_pci_napi_poll+0x3fa/0x4ea [rtw89_pci]\n   __napi_poll+0x33/0x1a0\n   net_rx_action+0x126/0x260\n   ? __queue_work+0x217/0x4c0\n   __do_softirq+0xd9/0x315\n   ? disable_irq_nosync+0x10/0x10\n   do_softirq.part.0+0x6d/0x90\n   </IRQ>\n   <TASK>\n   __local_bh_enable_ip+0x62/0x70\n   rtw89_pci_interrupt_threadfn+0x182/0x1a6 [rtw89_pci]\n   irq_thread_fn+0x28/0x60\n   irq_thread+0xc8/0x190\n   ? irq_thread_fn+0x60/0x60\n   kthread+0x16b/0x190\n   ? irq_thread_check_affinity+0xe0/0xe0\n   ? set_kthread_struct+0x50/0x50\n   ret_from_fork+0x22/0x30\n   </TASK>"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The bug is in rtw89_phy_cfo_parse() on the WiFi RX path (PPDU status via rtw89_core_rx → NAPI/IRQ), triggered while processing over-the-air frames. Per kernel WiFi guidance, frame-driven driver bugs are Adjacent, not Network or Local.\nAC:L - An adjacent attacker can reliably elicit PPDU status/CFO parsing by sending on-channel OFDM traffic, and mac_id is an 8-bit RX descriptor field while the arrays are only size 64 (also RTW89_MAX_MAC_ID_NUM is 128). SoftAP multi-station or HW-reported values ≥64 (observed index 188) hit the OOB write without an attacker-uncontrollable race.\nPR:N - The vulnerable path runs in driver RX interrupt/NAPI context with no authentication or capability check. An adjacent WiFi peer needs no account or privileges on the victim host.\nUI:N - Once the rtw89 interface is operating, PPDU status and CFO parsing run automatically on received frames. The attacker does not need the victim to mount, open a device, or accept a prompt.\nS:U - Impact is memory corruption inside the same host kernel WiFi driver authority. This is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - Unchecked mac_id indexes cfo_tail[]/cfo_cnt[] and can write past rtw89_cfo_tracking_info into adjacent rtw89_dev state. That kernel memory corruption is defensibly leveraged for disclosure primitives, so confidentiality is High.\nI:H - This is a confirmed out-of-bounds write (cfo_tail[macid] += cfo_val and cfo_cnt[macid]++), which is High integrity impact under kernel OOB-write guidance and can yield write/control-flow primitives.\nA:H - Out-of-bounds writes into driver/device state can oops or panic the kernel in IRQ/NAPI context, and repeated adjacent triggering can cause reliable denial of service even without full exploitation."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtw89/phy.c"],"versions":[{"version":"e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd","lessThan":"03ed236480aeec8c2fd327a1ea6d711364c495e3","status":"affected","versionType":"git"},{"version":"e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd","lessThan":"c32fafe68298bb599e825c298e1d0ba30186f0a5","status":"affected","versionType":"git"},{"version":"e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd","lessThan":"97df85871a5b187609d30fca6d85b912d9e02f29","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtw89/phy.c"],"versions":[{"version":"5.16","status":"affected"},{"version":"0","lessThan":"5.16","status":"unaffected","versionType":"semver"},{"version":"5.17.14","lessThanOrEqual":"5.17.*","status":"unaffected","versionType":"semver"},{"version":"5.18.3","lessThanOrEqual":"5.18.*","status":"unaffected","versionType":"semver"},{"version":"5.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/03ed236480aeec8c2fd327a1ea6d711364c495e3"},{"url":"https://git.kernel.org/stable/c/c32fafe68298bb599e825c298e1d0ba30186f0a5"},{"url":"https://git.kernel.org/stable/c/97df85871a5b187609d30fca6d85b912d9e02f29"}],"title":"rtw89: cfo: check mac_id to avoid out-of-bounds","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49471","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-10-01T19:39:49.476327Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-129","description":"CWE-129 Improper Validation of Array Index"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-01T19:46:46.352Z"}}]}}