CVE-2022-49395

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49395
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49395.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49395
Related
Published
2025-02-26T07:01:16Z
Modified
2025-02-26T19:01:18.336804Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

um: Fix out-of-bounds read in LDT setup

syscallstubdata() expects the data_count parameter to be the number of longs, not bytes.

================================================================== BUG: KASAN: stack-out-of-bounds in syscallstubdata+0x70/0xe0 Read of size 128 at addr 000000006411f6f0 by task swapper/1

CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18 Call Trace: showstack.cold+0x166/0x2a7 _dumpstack+0x3a/0x43 dumpstacklvl+0x1f/0x27 printreport.cold+0xdb/0xf81 kasanreport+0x119/0x1f0 kasancheckrange+0x3a3/0x440 memcpy+0x52/0x140 syscallstubdata+0x70/0xe0 writeldtentry+0xac/0x190 initnewldt+0x515/0x960 initnewcontext+0x2c4/0x4d0 mminit.constprop.0+0x5ed/0x760 mmalloc+0x118/0x170 0x60033f48 dooneinitcall+0x1d7/0x860 0x60003e7b kernelinit+0x6e/0x3d4 newthreadhandler+0x1e7/0x2c0

The buggy address belongs to stack of task swapper/1 and is located at offset 64 in frame: initnewldt+0x0/0x960

This frame has 2 objects: [32, 40) 'addr' [64, 80) 'desc' ==================================================================

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.127-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.18.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.18.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}