cve-2021-47540
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-11-04 12:07
Severity ?
EPSS score ?
Summary
mt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode
References
{
"containers": {
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"dateUpdated": "2024-08-04T05:39:59.621Z",
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"url": "https://git.kernel.org/stable/c/14b03b8cebdf18ff13c39d58501b625411314de2"
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"url": "https://git.kernel.org/stable/c/6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c"
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"content": {
"id": "CVE-2021-47540",
"options": [
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"Exploitation": "none"
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{
"Automatable": "no"
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{
"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2024-09-10T15:35:20.346625Z",
"version": "2.0.3"
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7915/mcu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "37f4ca907c46",
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"version": "37f4ca907c46",
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"product": "Linux",
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7915/mcu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
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{
"lessThan": "5.8",
"status": "unaffected",
"version": "0",
"versionType": "semver"
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{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.84",
"versionType": "semver"
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{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.7",
"versionType": "semver"
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{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.16",
"versionType": "original_commit_for_fix"
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode\n\nFix the following NULL pointer dereference in mt7915_get_phy_mode\nroutine adding an ibss interface to the mt7915 driver.\n\n[ 101.137097] wlan0: Trigger new scan to find an IBSS to join\n[ 102.827039] wlan0: Creating new IBSS network, BSSID 26:a4:50:1a:6e:69\n[ 103.064756] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[ 103.073670] Mem abort info:\n[ 103.076520] ESR = 0x96000005\n[ 103.079614] EC = 0x25: DABT (current EL), IL = 32 bits\n[ 103.084934] SET = 0, FnV = 0\n[ 103.088042] EA = 0, S1PTW = 0\n[ 103.091215] Data abort info:\n[ 103.094104] ISV = 0, ISS = 0x00000005\n[ 103.098041] CM = 0, WnR = 0\n[ 103.101044] user pgtable: 4k pages, 39-bit VAs, pgdp=00000000460b1000\n[ 103.107565] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\n[ 103.116590] Internal error: Oops: 96000005 [#1] SMP\n[ 103.189066] CPU: 1 PID: 333 Comm: kworker/u4:3 Not tainted 5.10.75 #0\n[ 103.195498] Hardware name: MediaTek MT7622 RFB1 board (DT)\n[ 103.201124] Workqueue: phy0 ieee80211_iface_work [mac80211]\n[ 103.206695] pstate: 20000005 (nzCv daif -PAN -UAO -TCO BTYPE=--)\n[ 103.212705] pc : mt7915_get_phy_mode+0x68/0x120 [mt7915e]\n[ 103.218103] lr : mt7915_mcu_add_bss_info+0x11c/0x760 [mt7915e]\n[ 103.223927] sp : ffffffc011cdb9e0\n[ 103.227235] x29: ffffffc011cdb9e0 x28: ffffff8006563098\n[ 103.232545] x27: ffffff8005f4da22 x26: ffffff800685ac40\n[ 103.237855] x25: 0000000000000001 x24: 000000000000011f\n[ 103.243165] x23: ffffff8005f4e260 x22: ffffff8006567918\n[ 103.248475] x21: ffffff8005f4df80 x20: ffffff800685ac58\n[ 103.253785] x19: ffffff8006744400 x18: 0000000000000000\n[ 103.259094] x17: 0000000000000000 x16: 0000000000000001\n[ 103.264403] x15: 000899c3a2d9d2e4 x14: 000899bdc3c3a1c8\n[ 103.269713] x13: 0000000000000000 x12: 0000000000000000\n[ 103.275024] x11: ffffffc010e30c20 x10: 0000000000000000\n[ 103.280333] x9 : 0000000000000050 x8 : ffffff8006567d88\n[ 103.285642] x7 : ffffff8006563b5c x6 : ffffff8006563b44\n[ 103.290952] x5 : 0000000000000002 x4 : 0000000000000001\n[ 103.296262] x3 : 0000000000000001 x2 : 0000000000000001\n[ 103.301572] x1 : 0000000000000000 x0 : 0000000000000011\n[ 103.306882] Call trace:\n[ 103.309328] mt7915_get_phy_mode+0x68/0x120 [mt7915e]\n[ 103.314378] mt7915_bss_info_changed+0x198/0x200 [mt7915e]\n[ 103.319941] ieee80211_bss_info_change_notify+0x128/0x290 [mac80211]\n[ 103.326360] __ieee80211_sta_join_ibss+0x308/0x6c4 [mac80211]\n[ 103.332171] ieee80211_sta_create_ibss+0x8c/0x10c [mac80211]\n[ 103.337895] ieee80211_ibss_work+0x3dc/0x614 [mac80211]\n[ 103.343185] ieee80211_iface_work+0x388/0x3f0 [mac80211]\n[ 103.348495] process_one_work+0x288/0x690\n[ 103.352499] worker_thread+0x70/0x464\n[ 103.356157] kthread+0x144/0x150\n[ 103.359380] ret_from_fork+0x10/0x18\n[ 103.362952] Code: 394008c3 52800220 394000e4 7100007f (39400023)"
}
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"providerMetadata": {
"dateUpdated": "2024-11-04T12:07:54.561Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/932b338f4e5c4cb0c2ed640da3bced1e63620198"
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"url": "https://git.kernel.org/stable/c/14b03b8cebdf18ff13c39d58501b625411314de2"
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{
"url": "https://git.kernel.org/stable/c/6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c"
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],
"title": "mt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode",
"x_generator": {
"engine": "bippy-9e1c9544281a"
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2021-47540",
"datePublished": "2024-05-24T15:09:47.256Z",
"dateReserved": "2024-05-24T15:02:54.828Z",
"dateUpdated": "2024-11-04T12:07:54.561Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2021-47540\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:18.147\",\"lastModified\":\"2024-06-10T18:35:23.710\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode\\n\\nFix the following NULL pointer dereference in mt7915_get_phy_mode\\nroutine adding an ibss interface to the mt7915 driver.\\n\\n[ 101.137097] wlan0: Trigger new scan to find an IBSS to join\\n[ 102.827039] wlan0: Creating new IBSS network, BSSID 26:a4:50:1a:6e:69\\n[ 103.064756] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\\n[ 103.073670] Mem abort info:\\n[ 103.076520] ESR = 0x96000005\\n[ 103.079614] EC = 0x25: DABT (current EL), IL = 32 bits\\n[ 103.084934] SET = 0, FnV = 0\\n[ 103.088042] EA = 0, S1PTW = 0\\n[ 103.091215] Data abort info:\\n[ 103.094104] ISV = 0, ISS = 0x00000005\\n[ 103.098041] CM = 0, WnR = 0\\n[ 103.101044] user pgtable: 4k pages, 39-bit VAs, pgdp=00000000460b1000\\n[ 103.107565] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\\n[ 103.116590] Internal error: Oops: 96000005 [#1] SMP\\n[ 103.189066] CPU: 1 PID: 333 Comm: kworker/u4:3 Not tainted 5.10.75 #0\\n[ 103.195498] Hardware name: MediaTek MT7622 RFB1 board (DT)\\n[ 103.201124] Workqueue: phy0 ieee80211_iface_work [mac80211]\\n[ 103.206695] pstate: 20000005 (nzCv daif -PAN -UAO -TCO BTYPE=--)\\n[ 103.212705] pc : mt7915_get_phy_mode+0x68/0x120 [mt7915e]\\n[ 103.218103] lr : mt7915_mcu_add_bss_info+0x11c/0x760 [mt7915e]\\n[ 103.223927] sp : ffffffc011cdb9e0\\n[ 103.227235] x29: ffffffc011cdb9e0 x28: ffffff8006563098\\n[ 103.232545] x27: ffffff8005f4da22 x26: ffffff800685ac40\\n[ 103.237855] x25: 0000000000000001 x24: 000000000000011f\\n[ 103.243165] x23: ffffff8005f4e260 x22: ffffff8006567918\\n[ 103.248475] x21: ffffff8005f4df80 x20: ffffff800685ac58\\n[ 103.253785] x19: ffffff8006744400 x18: 0000000000000000\\n[ 103.259094] x17: 0000000000000000 x16: 0000000000000001\\n[ 103.264403] x15: 000899c3a2d9d2e4 x14: 000899bdc3c3a1c8\\n[ 103.269713] x13: 0000000000000000 x12: 0000000000000000\\n[ 103.275024] x11: ffffffc010e30c20 x10: 0000000000000000\\n[ 103.280333] x9 : 0000000000000050 x8 : ffffff8006567d88\\n[ 103.285642] x7 : ffffff8006563b5c x6 : ffffff8006563b44\\n[ 103.290952] x5 : 0000000000000002 x4 : 0000000000000001\\n[ 103.296262] x3 : 0000000000000001 x2 : 0000000000000001\\n[ 103.301572] x1 : 0000000000000000 x0 : 0000000000000011\\n[ 103.306882] Call trace:\\n[ 103.309328] mt7915_get_phy_mode+0x68/0x120 [mt7915e]\\n[ 103.314378] mt7915_bss_info_changed+0x198/0x200 [mt7915e]\\n[ 103.319941] ieee80211_bss_info_change_notify+0x128/0x290 [mac80211]\\n[ 103.326360] __ieee80211_sta_join_ibss+0x308/0x6c4 [mac80211]\\n[ 103.332171] ieee80211_sta_create_ibss+0x8c/0x10c [mac80211]\\n[ 103.337895] ieee80211_ibss_work+0x3dc/0x614 [mac80211]\\n[ 103.343185] ieee80211_iface_work+0x388/0x3f0 [mac80211]\\n[ 103.348495] process_one_work+0x288/0x690\\n[ 103.352499] worker_thread+0x70/0x464\\n[ 103.356157] kthread+0x144/0x150\\n[ 103.359380] ret_from_fork+0x10/0x18\\n[ 103.362952] Code: 394008c3 52800220 394000e4 7100007f (39400023)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mt76: mt7915: corrige la desreferencia del puntero NULL en mt7915_get_phy_mode. Corrija la siguiente desreferencia del puntero NULL en la rutina mt7915_get_phy_mode agregando una interfaz ibss al controlador mt7915. [ 101.137097] wlan0: activa una nueva exploraci\u00f3n para encontrar un IBSS al que unirse [ 102.827039] wlan0: crea una nueva red IBSS, BSSID 26:a4:50:1a:6e:69 [ 103.064756] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000000 [ 103.073670] Informaci\u00f3n de cancelaci\u00f3n de memoria: [ 103.076520] ESR = 0x96000005 [ 103.079614] EC = 0x25: DABT (EL actual), IL = 32 bits [ 103.084934] SET = 0, FnV = 0 [ 103.088042] EA = 0, 1PTW = 0 [ 103.091215] Informaci\u00f3n de cancelaci\u00f3n de datos: [ 103.094104] ISV = 0, ISS = 0x00000005 [ 103.098041] CM = 0, WnR = 0 [ 103.101044] tabla de p\u00e1ginas de usuario: p\u00e1ginas de 4k, VA de 39 bits, pgdp=00000000460 b1000 [ 103.107565 ] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000 [103.116590] Error interno: Ups: 96000005 [#1] SMP [103.189066] CPU: 1 PID: 333 Comunicaciones: kworker/u4:3 No contaminado 5.10.75 #0 [ 103.195498 ] Nombre del hardware: Placa MediaTek MT7622 RFB1 (DT) [103.201124] Cola de trabajo: phy0 ieee80211_iface_work [mac80211] [103.206695] pstate: 20000005 (nzCv daif -PAN -UAO -TCO BTYPE=--) [103.212705] pc: t7915_get_phy_mode+0x68/ 0x120 [MT7915E] [103.218103] LR: MT7915_MCU_ADD_BSS_INFO+0X11C/0X760 [MT7915E] [103.223927] SP: FFFFFFFC011CDB9E0 [103.222235] x29: F8006563098 [103.232545] x27: ffffff8005f4da22 x26: ffffff800685ac40 [103.237855] x25: 000000000000000001 x24: 000000000000011f [ 103.243165] x23: ffffff8005f4e260 x22: ffffff8006567918 [ 103.248475] x21: ffffff8005f4df80 x20: ffffff800685ac58 [ 103.253785] x19: 44400 x18: 0000000000000000 [ 103.259094] x17: 0000000000000000 x16: 0000000000000001 [ 103.264403] x15: 000899c3a2d9d2e4 x14: 99bdc3c3a1c8 [103.269713] x13: 0000000000000000 x12: 0000000000000000 [ 103.275024] x11: ffffffc010e30c20 x10: 0000000000000000 [ 103.280333] x9 : 0000000000000050 x8: ffffff8006567d88 [103.285642] x7: ffffff8006563b5c x6: ffffff8006563b44 [103.290952] x5: 00000000000000002 x4: 0000000000000001 [ 103.2 96262] x3: 0000000000000001 x2: 0000000000000001 [ 103.301572] x1: 0000000000000000 x0: 0000000000000011 [103.306882] Rastreo de llamadas: [103.309328] mt7915_get_phy_mode+0x68/0x120 [mt7915e] [ 378] mt7915_bss_info_changed+0x198/0x200 [mt7915e] [ 103.319941] ieee80211_bss_info_change_notify+0x128/0x290 [mac80211] [ 103.326360] __ieee80211_sta_join_ibss+0x308/0x6c4 [mac80211] [ 103.332171] ieee80211_sta_create_ibss+0x8c/0x10c [mac80211] [ 103.337895] 614 [mac80211] [ 103.343185] ieee80211_iface_work+0x388/0x3f0 [mac80211] [ 103.348495] Process_one_work+0x288/0x690 [ 103.352499] work_thread+0x70/0x464 [ 103.356157] kthread+0x144/0x150 [ 103.359380] ret_from_fork+0x10/0x18 [ 103.362952] C\u00f3digo: 394008c3 52800220 00e4 7100007f (39400023)\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.8\",\"versionEndExcluding\":\"5.10.84\",\"matchCriteriaId\":\"E9314948-D53C-419C-B785-89A3C0B287DE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.7\",\"matchCriteriaId\":\"A696A60B-2782-4119-83DD-1EFFBC903F02\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/14b03b8cebdf18ff13c39d58501b625411314de2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/932b338f4e5c4cb0c2ed640da3bced1e63620198\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.