fkie_cve-2022-48714
Vulnerability from fkie_nvd
Published
2024-06-20 11:15
Modified
2025-09-17 17:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages
after mapping"), non-VM_ALLOC mappings will be marked as accessible
in __get_vm_area_node() when KASAN is enabled. But now the flag for
ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access
after vmap() returns. Because the ringbuf area is created by mapping
allocated pages, so use VM_MAP instead.
After the change, info in /proc/vmallocinfo also changes from
[start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmalloc user
to
[start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmap user
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 5.17 | |
| linux | linux_kernel | 5.17 |
{
"configurations": [
{
"nodes": [
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "539F713A-F940-4698-BC87-245228B4AB3D",
"versionEndExcluding": "5.10.99",
"versionStartIncluding": "5.8",
"vulnerable": true
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "74528AA6-B524-4C3F-B188-1194235FE47D",
"versionEndExcluding": "5.15.22",
"versionStartIncluding": "5.11",
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"matchCriteriaId": "0623892A-E3E4-44E6-8A5E-39A0B47AF782",
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"negate": false,
"operator": "OR"
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Use VM_MAP instead of VM_ALLOC for ringbuf\n\nAfter commit 2fd3fb0be1d1 (\"kasan, vmalloc: unpoison VM_ALLOC pages\nafter mapping\"), non-VM_ALLOC mappings will be marked as accessible\nin __get_vm_area_node() when KASAN is enabled. But now the flag for\nringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access\nafter vmap() returns. Because the ringbuf area is created by mapping\nallocated pages, so use VM_MAP instead.\n\nAfter the change, info in /proc/vmallocinfo also changes from\n [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmalloc user\nto\n [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmap user"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bpf: use VM_MAP en lugar de VM_ALLOC para ringbuf Despu\u00e9s del commit 2fd3fb0be1d1 (\"kasan, vmalloc: despoisone las p\u00e1ginas VM_ALLOC despu\u00e9s del mapeo\"), los mapeos que no sean VM_ALLOC se marcar\u00e1n como accesibles en __get_vm_area_node( ) cuando KASAN est\u00e1 habilitado. Pero ahora el indicador para el \u00e1rea ringbuf es VM_ALLOC, por lo que KASAN se quejar\u00e1 del acceso fuera de los l\u00edmites despu\u00e9s de que regrese vmap(). Debido a que el \u00e1rea ringbuf se crea asignando p\u00e1ginas asignadas, use VM_MAP en su lugar. Despu\u00e9s del cambio, la informaci\u00f3n en /proc/vmallocinfo tambi\u00e9n cambia de [inicio]-[fin] 24576 ringbuf_map_alloc+0x171/0x290 usuario vmalloc a [inicio]-[fin] 24576 ringbuf_map_alloc+0x171/0x290 usuario vmap"
}
],
"id": "CVE-2022-48714",
"lastModified": "2025-09-17T17:12:54.117",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.2,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2024-06-20T11:15:55.033",
"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3eb"
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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.
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