High severity · published Jul 5, 2022
CVE-2022-33743
network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having…
7.8
CVSS
0.4%
EPSS
No
On KEV
Description
network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.9 through 5.18 · source: NVD
DL
Debian Linux · Debian
11.0 · source: NVD
XE
Xen · Xen
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-33743
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-33743
Mailing List
http://www.openwall.com/lists/oss-security/2022/07/05/5
Patch
http://xenbits.xen.org/xsa/advisory-405.html
Third Party Advisory
https://www.debian.org/security/2022/dsa-5191
Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-405.txt
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