CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
15.7%
In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() calls fdget(oldfd), then without further checks passes the resulting file* into shiftfs_real_fdget(), which casts file->private_data, a void* that points to a filesystem-dependent type, to a “struct shiftfs_file_info *”. As the private_data is not required to be a pointer, an attacker can use this to cause a denial of service or possibly execute arbitrary code.
[
{
"product": "Shiftfs in the Linux kernel",
"vendor": "Ubuntu",
"versions": [
{
"changes": [
{
"at": "5.3.0-22.24",
"status": "unaffected"
}
],
"lessThan": "5.3 kernel*",
"status": "affected",
"version": "5.3.0-11.12",
"versionType": "custom"
},
{
"lessThan": "5.0.0-35.38",
"status": "affected",
"version": "5.0 kernel",
"versionType": "custom"
}
]
}
]
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
15.7%