{
"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 \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 \n \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 "
}
],
"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"
}
}
]
}
}