__btrfsfreeextent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfsprintleaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesgrestrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARNON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case.
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.3.12"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "14.04"
}
]
},
{
"events": [
{
"introduced": "0"
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{
"last_affected": "16.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "18.04"
}
]
}
]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19039.json"