DEBIAN-CVE-2022-49081

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Source
https://security-tracker.debian.org/tracker/CVE-2022-49081
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49081.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2022-49081
Upstream
Published
2025-02-26T07:00:45Z
Modified
2025-10-15T09:01:36Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: highmem: fix checks in _kmaplocalsched{in,out} When CONFIGDEBUGKMAPLOCAL is enabled _kmaplocalsched{in,out} check that even slots in the tsk->kmapctrl.pteval are unmapped. The slots are initialized with 0 value, but the check is done with ptenone. 0 pte however does not necessarily mean that ptenone will return true. e.g. on xtensa it returns false, resulting in the following runtime warnings: WARNING: CPU: 0 PID: 101 at mm/highmem.c:627 _kmaplocalschedout+0x51/0x108 CPU: 0 PID: 101 Comm: touch Not tainted 5.17.0-rc7-00010-gd3a1cdde80d2-dirty #13 Call Trace: dumpstack+0xc/0x40 _warn+0x8f/0x174 warnslowpathfmt+0x48/0xac _kmaplocalschedout+0x51/0x108 _schedule+0x71a/0x9c4 preemptscheduleirq+0xa0/0xe0 commonexceptionreturn+0x5c/0x93 dowppage+0x30e/0x330 handlemmfault+0xa70/0xc3c dopagefault+0x1d8/0x3c4 commonexception+0x7f/0x7f WARNING: CPU: 0 PID: 101 at mm/highmem.c:664 _kmaplocalschedin+0x50/0xe0 CPU: 0 PID: 101 Comm: touch Tainted: G W 5.17.0-rc7-00010-gd3a1cdde80d2-dirty #13 Call Trace: dumpstack+0xc/0x40 _warn+0x8f/0x174 warnslowpathfmt+0x48/0xac _kmaplocalschedin+0x50/0xe0 finishtaskswitch$isra$0+0x1ce/0x2f8 _schedule+0x86e/0x9c4 preemptscheduleirq+0xa0/0xe0 commonexceptionreturn+0x5c/0x93 dowppage+0x30e/0x330 handlemmfault+0xa70/0xc3c dopagefault+0x1d8/0x3c4 commonexception+0x7f/0x7f Fix it by replacing !ptenone(pteval) with pteval(pteval) != 0.

References

Affected packages

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
5.17.3-1

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
5.17.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / 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
5.17.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}