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CVE-2022-49795

17
FAUCET Score

CVE-2022-49795 describes a memory leak vulnerability in the rethook_alloc() function within the Linux kernel. This flaw occurs when the 'rh' variable is not properly freed or passed out if the 'handler' is NULL, affecting various Linux kernel versions. The vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, requiring low privileges, and primarily impacting availability (A:H). There is no impact on confidentiality or integrity. Currently, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE. It is not listed in CISA's Known Exploited Vulnerabilities catalog.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.18, < 6.0.10CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
6.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.15%
Probability of exploitation in next 30 days
EPSS Percentile
4.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0015 is in the 28th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-362.8.1.el9_3
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2022-49795Moderate

kernel: rethook: fix a potential memleak in rethook_alloc()

May 1, 2025

References

git.kernel.org / stable/c/0a1ebe35cb3b7aa1f4b26b37e2a0b9ae68dc4ffb
Patch
git.kernel.org / stable/c/cbc5d1f9a8cc40ba2bc6779b36d2ea1f65bc027c
Patch