CVE-2021-47124

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47124
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47124.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47124
Related
Published
2024-03-15T21:15:07Z
Modified
2024-09-18T03:17:20.116426Z
Summary
[none]
Details

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

io_uring: fix link timeout refs

WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcountwarnsaturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcountwarnsaturate+0x15b/0x1a0 lib/refcount.c:28 Call Trace: _refcountsubandtest include/linux/refcount.h:283 [inline] _refcountdecandtest include/linux/refcount.h:315 [inline] refcountdecandtest include/linux/refcount.h:333 [inline] ioputreq fs/iouring.c:2140 [inline] ioqueuelinkedtimeout fs/iouring.c:6300 [inline] _ioqueuesqe+0xbef/0xec0 fs/iouring.c:6354 iosubmitsqe fs/iouring.c:6534 [inline] iosubmitsqes+0x2bbd/0x7c50 fs/iouring.c:6660 _dosysiouringenter fs/iouring.c:9240 [inline] _sesysiouringenter+0x256/0x1d60 fs/iouring.c:9182

iolinktimeoutfn() should put only one reference of the linked timeout request, however in case of racing with the master request's completion first ioreqcomplete() puts one and then ioputreqdeferred() is called.

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
5.10.70-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+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
5.14.6-1

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
5.14.6-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}