CVE-2022-24122: fedoraproject fedora Use After Free

Modified

AliasesUBUNTU-CVE-2022-24122DEBIAN-CVE-2022-24122

Published 29-01-2022Last modified 03-08-2024

Vulnerability summary

CVE-2022-24122 is a high (CVSS 7.8) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 63.1% of scored vulnerabilities. 1 public exploit is recorded.

Priority

Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?

CVSS score

7.8/10

010

High · v3.1 (NVD)

EPSS score

1.01%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 3 · Related 1

MGASA-2022-0041 MGASA-2022-0063 USN-5278-1

Timeline

29-01-2022
PublishedVulnerability first disclosed.
03-08-2024
Last modifiedVulnerability information updated.

Description

kernel/ucount.c in the Linux kernel 5.14 through 5.16.4, when unprivileged user namespaces are enabled, allows a use-after-free and privilege escalation because a ucounts object can outlive its namespace.

CVSS metrics

4 scores · 3 sources · 2 versions

v3.17.8v2.06.9

EPSS trend

Probability

1.01%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.01% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found

referenceUnverified
Exploit Reference (openwall.com)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu25 products

linux-aws-5.0All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.8All versions (No fix recorded)
linux-azureAll versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)

Show all 25

Netapp8 products

Show all 8

Debian1 product

linux< 5.15.15-2

Fedoraproject1 product

fedoraEOL34 | 35

Linux1 product

linux_kernel≥ 5.14, < 5.15.19 | ≥ 5.16, < 5.16.5

5 vendors · 36 products

References

14 links

github.com/torvalds/linux/commit/f9d87929d451d3e649699d0f1d74f71f77ad38f5X Refsource MISCPatchThird Party Advisory
git.kernel.org/cgit/…X Refsource MISCMailing ListPatchVendor Advisory
www.openwall.com/lists/oss-security/2022/01/29/1X Refsource MISCREPORTExploitMailing ListThird Party Advisory
lists.fedoraproject.org/archives/…Vendor AdvisoryX Refsource FEDORAMailing List
lists.fedoraproject.org/archives/…Vendor AdvisoryX Refsource FEDORAMailing List
security.netapp.com/advisory/ntap-20220221-0001/X Refsource CONFIRMThird Party Advisory
ubuntu.com/security/CVE-2022-24122REPORT
git.kernel.org/linus/f9d87929d451d3e649699d0f1d74f71f77ad38f5REPORT
git.kernel.org/pub/…REPORT
git.kernel.org/pub/…REPORT

Show all 14 references

ubuntu.com/security/notices/USN-5278-1Advisory
www.cve.org/CVERecord?id=CVE-2022-24122REPORT
security-tracker.debian.org/tracker/CVE-2022-24122Advisory
nvd.nist.gov/vuln/detail/CVE-2022-24122OvalAdvisory