CVE-2021-47240

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47240
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47240.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47240
Related
Published
2024-05-21T15:15:13Z
Modified
2024-09-18T01:00:20Z
Summary
[none]
Details

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

net: qrtr: fix OOB Read in qrtrendpointpost

Syzbot reported slab-out-of-bounds Read in qrtrendpointpost. The problem was in wrong size type:

if (len != ALIGN(size, 4) + hdrlen)
    goto err;

If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and

skb_put_data(skb, data + hdrlen, size);

will read out of bound from data, which is hdrlen allocated block.

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
5.10.46-1

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
5.10.46-1

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
5.10.46-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}