// For flags

CVE-2022-49561

netfilter: conntrack: re-fetch conntrack after insertion

Severity Score

6.3
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and
set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension
space used to free'd after an rcu grace period, plus the race needs
events enabled to trigger.

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2025-02-26 CVE Reserved
  • 2025-02-26 CVE Published
  • 2025-02-26 CVE Updated
  • ---------- EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 4.14.282
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.14.282"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 4.19.246
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.19.246"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 5.4.197
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.4.197"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 5.10.120
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.10.120"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 5.15.45
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.15.45"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 5.17.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.17.13"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 5.18.2
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.18.2"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.7 < 5.19
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.19"
en
Affected