CVE-2022-42720: debian debian_linux Use After Free

Modified

AliasesALPINE-CVE-2022-42720UBUNTU-CVE-2022-42720DEBIAN-CVE-2022-42720

Published 13-10-2022Last modified 14-10-2026

Vulnerability summary

CVE-2022-42720 is a high (CVSS 7.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59.7% 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 (CVE.org)

EPSS score

0.90%

0%100%

Low · +0.05 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1reference

Timeline

13-10-2022
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.x before 5.19.16 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.

CVSS metrics

5 scores · 5 sources · 1 version

v3.17.8

EPSS trend

Probability

0.90%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

Increase +0.05 pp

From 0.85% 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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.

Ubuntu83 products

backport-iwlwifi-dkmsAll versions (No fix recorded) | < 8324-0ubuntu3~20.04.5 | < 9858-0ubuntu3.1
linux< 5.4.0-131.147 | < 5.15.0-52.58
linux-aws< 5.4.0-1088.96 | < 5.15.0-1022.26
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1022.26~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1088.96~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-fips< 5.4.0-1088.96+fips1 | All versions (No fix recorded)
linux-azureAll versions (No fix recorded) | < 5.4.0-1094.100 | < 5.15.0-1022.27
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1022.27~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1094.100~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1024.30.1
linux-azure-fips< 5.4.0-1094.100+fips1 | All versions (No fix recorded)
linux-bluefield< 5.4.0-1049.55
linux-fips< 5.4.0-1064.73 | All versions (No fix recorded)
linux-gcpAll versions (No fix recorded) | < 5.4.0-1092.101 | < 5.15.0-1021.28
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1021.28~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1092.101~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-fips< 5.4.0-1092.101+fips1 | All versions (No fix recorded)
linux-gke< 5.4.0-1086.93 | < 5.15.0-1019.23
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1019.23~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1056.60 | < 5.15.0-1007.10
linux-gkeop-5.15< 5.15.0-1007.10~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-52.58~20.04.1
linux-hwe-5.4< 5.4.0-131.147~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1036.41 | < 5.15.0-1017.20
linux-ibm-5.4< 5.4.0-1036.41~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-intel-iotg< 5.15.0-1018.23
linux-intel-iotg-5.15< 5.15.0-1018.23~20.04.1
linux-iot< 5.4.0-1006.8
linux-kvm< 5.4.0-1078.84 | < 5.15.0-1020.24
linux-lowlatency< 5.15.0-52.58
linux-lowlatency-hwe-5.15< 5.15.0-52.58~20.04.1
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-nvidia< 5.15.0-1015.15
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14< 5.14.0-1054.61
linux-oem-5.17< 5.17.0-1020.21
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.1All versions (No fix recorded)
linux-oracle< 5.4.0-1086.95 | < 5.15.0-1021.27
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1021.27~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1086.95~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1073.84 | < 5.15.0-1017.19
linux-raspi-5.4< 5.4.0-1073.84~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1024.25
linux-riscvAll versions (No fix recorded) | < 5.15.0-1022.26
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1022.26~20.04.1
linux-riscv-5.8All versions (No fix recorded)

Show all 83

Debian2 products

linux< 6.0.2-1
debian_linuxEOL10.0 | 11.0

Alpine1 product

linux-lts< 5.15.74-r0

Fedoraproject1 product

fedoraEOL36 | 37

Linux1 product

linux_kernel≥ 5.1, < 5.4.218 | ≥ 5.5, < 5.10.148 | ≥ 5.11, < 5.15.74 | ≥ 5.16, < 5.19.16 | ≥ 6.0, < 6.0.2

5 vendors · 88 products

References

23 links

bugzilla.suse.com/show_bug.cgi?id=1204059REPORTIssue TrackingPatchThird Party Advisory
www.openwall.com/lists/oss-security/2022/10/13/5REPORTExploitMailing ListThird Party Advisory
git.kernel.org/pub/…REPORTMailing ListPatchVendor Advisory
lists.fedoraproject.org/archives/…Vendor Advisory
lists.fedoraproject.org/archives/…Vendor Advisory
lists.fedoraproject.org/archives/…Vendor Advisory
www.debian.org/security/2022/dsa-5257Vendor AdvisoryThird Party Advisory
lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlMailing ListThird Party Advisory
packetstormsecurity.com/files/169951/Kernel-Live-Patch-Security-Notice-LSN-0090-1.htmlThird Party AdvisoryVDB Entry
security.netapp.com/advisory/ntap-20230203-0008/Third Party Advisory

Show all 23 references

security.alpinelinux.org/vuln/CVE-2022-42720Advisory
ubuntu.com/security/CVE-2022-42720REPORT
access.redhat.com/security/cve/CVE-2022-42720REPORT
ubuntu.com/security/notices/USN-5691-1Advisory
ubuntu.com/security/notices/USN-5692-1Advisory
ubuntu.com/security/notices/USN-5693-1Advisory
ubuntu.com/security/notices/USN-5700-1Advisory
ubuntu.com/security/notices/USN-5708-1Advisory
ubuntu.com/security/notices/USN-5752-1Advisory
www.cve.org/CVERecord?id=CVE-2022-42720REPORT
security-tracker.debian.org/tracker/CVE-2022-42720Advisory
nvd.nist.gov/vuln/detail/CVE-2022-42720OvalAdvisory
cert-portal.siemens.com/productcert/html/ssa-794697.html