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vuln-cve/data/2021/47xxx/CVE-2021-47441.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2021-47441",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-05-21T14:58:30.831Z",
"datePublished": "2024-05-22T06:19:35.562Z",
"dateUpdated": "2026-05-11T13:54:45.908Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T13:54:45.908Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: thermal: Fix out-of-bounds memory accesses\n\nCurrently, mlxsw allows cooling states to be set above the maximum\ncooling state supported by the driver:\n\n # cat /sys/class/thermal/thermal_zone2/cdev0/type\n mlxsw_fan\n # cat /sys/class/thermal/thermal_zone2/cdev0/max_state\n 10\n # echo 18 > /sys/class/thermal/thermal_zone2/cdev0/cur_state\n # echo $?\n 0\n\nThis results in out-of-bounds memory accesses when thermal state\ntransition statistics are enabled (CONFIG_THERMAL_STATISTICS=y), as the\ntransition table is accessed with a too large index (state) [1].\n\nAccording to the thermal maintainer, it is the responsibility of the\ndriver to reject such operations [2].\n\nTherefore, return an error when the state to be set exceeds the maximum\ncooling state supported by the driver.\n\nTo avoid dead code, as suggested by the thermal maintainer [3],\npartially revert commit a421ce088ac8 (\"mlxsw: core: Extend cooling\ndevice with cooling levels\") that tried to interpret these invalid\ncooling states (above the maximum) in a special way. The cooling levels\narray is not removed in order to prevent the fans going below 20% PWM,\nwhich would cause them to get stuck at 0% PWM.\n\n[1]\nBUG: KASAN: slab-out-of-bounds in thermal_cooling_device_stats_update+0x271/0x290\nRead of size 4 at addr ffff8881052f7bf8 by task kworker/0:0/5\n\nCPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.15.0-rc3-custom-45935-gce1adf704b14 #122\nHardware name: Mellanox Technologies Ltd. \"MSN2410-CB2FO\"/\"SA000874\", BIOS 4.6.5 03/08/2016\nWorkqueue: events_freezable_power_ thermal_zone_device_check\nCall Trace:\n dump_stack_lvl+0x8b/0xb3\n print_address_description.constprop.0+0x1f/0x140\n kasan_report.cold+0x7f/0x11b\n thermal_cooling_device_stats_update+0x271/0x290\n __thermal_cdev_update+0x15e/0x4e0\n thermal_cdev_update+0x9f/0xe0\n step_wise_throttle+0x770/0xee0\n thermal_zone_device_update+0x3f6/0xdf0\n process_one_work+0xa42/0x1770\n worker_thread+0x62f/0x13e0\n kthread+0x3ee/0x4e0\n ret_from_fork+0x1f/0x30\n\nAllocated by task 1:\n kasan_save_stack+0x1b/0x40\n __kasan_kmalloc+0x7c/0x90\n thermal_cooling_device_setup_sysfs+0x153/0x2c0\n __thermal_cooling_device_register.part.0+0x25b/0x9c0\n thermal_cooling_device_register+0xb3/0x100\n mlxsw_thermal_init+0x5c5/0x7e0\n __mlxsw_core_bus_device_register+0xcb3/0x19c0\n mlxsw_core_bus_device_register+0x56/0xb0\n mlxsw_pci_probe+0x54f/0x710\n local_pci_probe+0xc6/0x170\n pci_device_probe+0x2b2/0x4d0\n really_probe+0x293/0xd10\n __driver_probe_device+0x2af/0x440\n driver_probe_device+0x51/0x1e0\n __driver_attach+0x21b/0x530\n bus_for_each_dev+0x14c/0x1d0\n bus_add_driver+0x3ac/0x650\n driver_register+0x241/0x3d0\n mlxsw_sp_module_init+0xa2/0x174\n do_one_initcall+0xee/0x5f0\n kernel_init_freeable+0x45a/0x4de\n kernel_init+0x1f/0x210\n ret_from_fork+0x1f/0x30\n\nThe buggy address belongs to the object at ffff8881052f7800\n which belongs to the cache kmalloc-1k of size 1024\nThe buggy address is located 1016 bytes inside of\n 1024-byte region [ffff8881052f7800, ffff8881052f7c00)\nThe buggy address belongs to the page:\npage:0000000052355272 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1052f0\nhead:0000000052355272 order:3 compound_mapcount:0 compound_pincount:0\nflags: 0x200000000010200(slab|head|node=0|zone=2)\nraw: 0200000000010200 ffffea0005034800 0000000300000003 ffff888100041dc0\nraw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff8881052f7a80: 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc fc\n ffff8881052f7b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n>ffff8881052f7b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n ffff8881052f7c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff8881052f7c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n\n[2] https://lore.kernel.org/linux-pm/9aca37cb-1629-5c67-\n---truncated---"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/mellanox/mlxsw/core_thermal.c"
],
"versions": [
{
"version": "a50c1e35650b929500bd89be61c89d95a267ce56",
"lessThan": "ae0993739e14a102d506aa09e11b0065f3144f10",
"status": "affected",
"versionType": "git"
},
{
"version": "a50c1e35650b929500bd89be61c89d95a267ce56",
"lessThan": "e59d839743b50cb1d3f42a786bea48cc5621d254",
"status": "affected",
"versionType": "git"
},
{
"version": "a50c1e35650b929500bd89be61c89d95a267ce56",
"lessThan": "df8e58716afb3bee2b59de66b1ba1033f2e26303",
"status": "affected",
"versionType": "git"
},
{
"version": "a50c1e35650b929500bd89be61c89d95a267ce56",
"lessThan": "332fdf951df8b870e3da86b122ae304e2aabe88c",
"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/ethernet/mellanox/mlxsw/core_thermal.c"
],
"versions": [
{
"version": "4.10",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.10",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.155",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.75",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.14.14",
"lessThanOrEqual": "5.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15",
"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": "4.10",
"versionEndExcluding": "5.4.155"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.10",
"versionEndExcluding": "5.10.75"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.10",
"versionEndExcluding": "5.14.14"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.10",
"versionEndExcluding": "5.15"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/ae0993739e14a102d506aa09e11b0065f3144f10"
},
{
"url": "https://git.kernel.org/stable/c/e59d839743b50cb1d3f42a786bea48cc5621d254"
},
{
"url": "https://git.kernel.org/stable/c/df8e58716afb3bee2b59de66b1ba1033f2e26303"
},
{
"url": "https://git.kernel.org/stable/c/332fdf951df8b870e3da86b122ae304e2aabe88c"
}
],
"title": "mlxsw: thermal: Fix out-of-bounds memory accesses",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-787",
"lang": "en",
"description": "CWE-787 Out-of-bounds Write"
}
]
}
],
"affected": [
{
"vendor": "linux",
"product": "linux_kernel",
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "a50c1e35650b",
"status": "affected",
"lessThan": "ae0993739e14",
"versionType": "custom"
}
]
},
{
"vendor": "linux",
"product": "linux_kernel",
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "4.10",
"status": "affected"
}
]
},
{
"vendor": "linux",
"product": "linux_kernel",
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "0",
"status": "unaffected",
"lessThan": "4.10",
"versionType": "custom"
}
]
},
{
"vendor": "linux",
"product": "linux_kernel",
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "5.4.155",
"status": "unaffected",
"lessThanOrEqual": "5.5",
"versionType": "custom"
}
]
},
{
"vendor": "linux",
"product": "linux_kernel",
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "5.10.75",
"status": "unaffected",
"lessThanOrEqual": "5.11",
"versionType": "custom"
}
]
},
{
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"product": "linux_kernel",
"cpes": [
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],
"defaultStatus": "unknown",
"versions": [
{
"version": "5.14.14",
"status": "unaffected",
"lessThanOrEqual": "5.15",
"versionType": "custom"
}
]
},
{
"vendor": "linux",
"product": "linux_kernel",
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
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"status": "unaffected",
"lessThanOrEqual": "*",
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},
{
"version": "a50c1e35650b",
"status": "affected",
"lessThan": "e59d839743b5",
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},
{
"version": "a50c1e35650b",
"status": "affected",
"lessThan": "332fdf951df8",
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}
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.3,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2024-05-22T15:01:53.700681Z",
"id": "CVE-2021-47441",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2024-08-22T18:05:13.999Z"
}
},
{
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2024-08-04T05:39:59.326Z"
},
"title": "CVE Program Container",
"references": [
{
"url": "https://git.kernel.org/stable/c/ae0993739e14a102d506aa09e11b0065f3144f10",
"tags": [
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{
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"tags": [
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"tags": [
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]
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]
}
]
}
}
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