CVE-2019-15794 (GCVE-0-2019-15794)
Vulnerability from cvelistv5
Published
2020-04-23 23:55
Modified
2024-09-16 19:52
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-672 - Operation on a Resource after Expiration or Release
Summary
Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma->vm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow.
References
| ► | URL | Tags |
|---|---|---|
|
|
||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Ubuntu | Linux kernel |
Version: 5.3 kernel < 5.3.0-24.26 Version: 5.0 kernel < 5.0.0-37.40 |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-05T00:56:22.473Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://usn.ubuntu.com/usn/usn-4208-1"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://usn.ubuntu.com/usn/usn-4209-1"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Linux kernel",
"vendor": "Ubuntu",
"versions": [
{
"lessThan": "5.3.0-24.26",
"status": "affected",
"version": "5.3 kernel",
"versionType": "custom"
},
{
"lessThan": "5.0.0-37.40",
"status": "affected",
"version": "5.0 kernel",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Jann Horn of Google Project Zero"
}
],
"datePublic": "2019-11-08T00:00:00",
"descriptions": [
{
"lang": "en",
"value": "Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma-\u003evm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-672",
"description": "CWE-672 Operation on a Resource after Expiration or Release",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-04-23T23:55:24",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://usn.ubuntu.com/usn/usn-4208-1"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://usn.ubuntu.com/usn/usn-4209-1"
}
],
"source": {
"defect": [
"https://bugs.launchpad.net/bugs/1850994"
],
"discovery": "EXTERNAL"
},
"title": "Reference counting error in overlayfs/shiftfs error path when used in conjuction with aufs",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@ubuntu.com",
"DATE_PUBLIC": "2019-11-08T00:00:00.000Z",
"ID": "CVE-2019-15794",
"STATE": "PUBLIC",
"TITLE": "Reference counting error in overlayfs/shiftfs error path when used in conjuction with aufs"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Linux kernel",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "5.3 kernel",
"version_value": "5.3.0-24.26"
},
{
"version_affected": "\u003c",
"version_name": "5.0 kernel",
"version_value": "5.0.0-37.40"
}
]
}
}
]
},
"vendor_name": "Ubuntu"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Jann Horn of Google Project Zero"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma-\u003evm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-672 Operation on a Resource after Expiration or Release"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635",
"refsource": "MISC",
"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635"
},
{
"name": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3",
"refsource": "MISC",
"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3"
},
{
"name": "https://usn.ubuntu.com/usn/usn-4208-1",
"refsource": "MISC",
"url": "https://usn.ubuntu.com/usn/usn-4208-1"
},
{
"name": "https://usn.ubuntu.com/usn/usn-4209-1",
"refsource": "MISC",
"url": "https://usn.ubuntu.com/usn/usn-4209-1"
}
]
},
"source": {
"defect": [
"https://bugs.launchpad.net/bugs/1850994"
],
"discovery": "EXTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2019-15794",
"datePublished": "2020-04-23T23:55:25.039982Z",
"dateReserved": "2019-08-29T00:00:00",
"dateUpdated": "2024-09-16T19:52:18.313Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Loading…
Loading…
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.
Loading…
Loading…