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CVE-2022-2602

24
FAUCET Score

CVE-2022-2602 is a Use-After-Free (UAF) vulnerability in the io_uring subsystem of the Linux kernel, specifically related to Unix SCM garbage collection, affecting Canonical and Linux kernel versions. With a CVSS score of 7.0 (HIGH), it has a local attack vector with high attack complexity, allowing for high confidentiality, integrity, and availability impacts. While not listed in CISA's KEV catalog, there is community discussion mentioning a potential "DirtyCred Remastered" exploit for Local Privilege Escalation (LPE), though no public exploit code or Metasploit modules are currently available.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.0.19CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:esm:*:*:*
20.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
22.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*
22.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:22.10:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.43%
Probability of exploitation in next 30 days
EPSS Percentile
70.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0143 is in the 94th percentile among its peer group of 1,525 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia msrc
Product: 16838-16823Fixed in: 5.15.153.1-1
microsoftpatch availablevia msrc
Product: 17095-17086Fixed in: 5.15.153.1-1
microsoftpatch availablevia msrc
Product: 19673-17086Fixed in: 5.15.153.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.153.1-1 on CBL Mariner 2.0Fixed in: 5.15.153.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.180.1-1 on CBL Mariner 2.0Fixed in: 5.15.153.1-1

Vendor Advisories (2)

microsoft2024-Jan/CVE-2022-2602Important

io_uring UAF Unix SCM garbage collection

Jan 9, 2024
redhatCVE-2022-2602Moderate

kernel: use-after-free when an io_uring request is being processed

Oct 18, 2022

References

packetstormsecurity.com / files/176533/Linux-Broken-Unix-GC-Interaction-Use-After-Free.html
cve.mitre.org / cgi-bin/cvename.cgi
Third Party Advisory
ubuntu.com / security/notices/USN-5691-1
Third Party Advisory
ubuntu.com / security/notices/USN-5692-1
Third Party Advisory
ubuntu.com / security/notices/USN-5693-1
Third Party Advisory
ubuntu.com / security/notices/USN-5700-1
Third Party Advisory
ubuntu.com / security/notices/USN-5752-1
Third Party Advisory