CVE-2022-42703: linux linux_kernel Use After Free

Modified

AliasesUBUNTU-CVE-2022-42703USN-5916-1DEBIAN-CVE-2022-42703

Published 09-10-2022Last modified 14-10-2026

Vulnerability summary

CVE-2022-42703 is a medium (CVSS 5.5) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities. 2 public exploits are recorded.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (NVD)

EPSS score

0.92%

0%100%

Low · +0.03 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits2reference

Advisory lineage

Upstream 0 · Downstream 52 · Related 41

Timeline

09-10-2022
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

mm/rmap.c in the Linux kernel before 5.19.7 has a use-after-free related to leaf anon_vma double reuse.

CVSS metrics

3 scores · 3 sources · 1 version

v3.15.5

EPSS trend

Probability

0.92%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.89% 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

2 found

referenceUnverified
Exploit Reference (bugs.chromium.org)
Maturity: unknown
referenceUnverified
Exploit Reference (googleprojectzero.blogspot.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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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.

Ubuntu84 products

linux< 4.4.0-235.269 | < 4.15.0-200.211 | < 5.4.0-132.148 | < 5.15.0-56.62 | < 3.13.0-192.243
linux-aws< 4.4.0-1114.120 | < 4.4.0-1152.167 | < 4.15.0-1146.158 | < 5.4.0-1089.97 | < 5.15.0-1026.30
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< 5.15.0-1026.30~20.04.2
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1089.97~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2085.91 | All versions (No fix recorded) | < 5.4.0-1089.97+fips1
linux-aws-hwe< 4.15.0-1146.158~16.04.2
linux-azure< 4.15.0-1157.172~14.04.2 | < 4.15.0-1159.174~16.04.1 | All versions (No fix recorded) | < 5.4.0-1095.101 | < 5.15.0-1029.36
linux-azure-4.15< 4.15.0-1157.172
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1029.36~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1095.101~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1029.36.1
linux-azure-fips< 4.15.0-2066.72 | All versions (No fix recorded) | < 5.4.0-1095.101+fips1
linux-bluefield< 5.4.0-1050.56
linux-dell300x< 4.15.0-1057.62
linux-fips< 4.4.0-1084.91 | All versions (No fix recorded) | < 4.15.0-1103.114 | < 5.4.0-1065.74
linux-gcp< 4.15.0-1141.157~16.04.2 | All versions (No fix recorded) | < 5.4.0-1093.102 | < 5.15.0-1025.32
linux-gcp-4.15< 4.15.0-1141.157
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1025.32~20.04.2
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1093.102~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2050.55 | All versions (No fix recorded) | < 5.4.0-1093.102+fips1
linux-gke< 5.4.0-1087.94 | < 5.15.0-1023.28
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1023.28~20.04.2
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1057.61 | < 5.15.0-1011.15
linux-gkeop-5.15< 5.15.0-1011.15~20.04.2
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-200.211~16.04.2 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-56.62~20.04.1
linux-hwe-5.4< 5.4.0-132.148~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1037.42 | < 5.15.0-1021.24
linux-ibm-5.4< 5.4.0-1037.42~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-intel-iotg< 5.15.0-1021.26
linux-intel-iotg-5.15< 5.15.0-1021.26~20.04.1
linux-iot< 5.4.0-1006.8
linux-kvm< 4.4.0-1115.125 | < 4.15.0-1132.137 | < 5.4.0-1079.85 | < 5.15.0-1024.29
linux-lowlatency< 5.15.0-56.62
linux-lowlatency-hwe-5.15< 5.15.0-56.62~20.04.1
linux-lts-xenial< 4.4.0-235.269~14.04.1
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< 5.14.0-1055.62
linux-oem-5.17< 5.17.0-1024.25
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1111.122~16.04.2 | < 4.15.0-1111.122 | < 5.4.0-1087.96 | < 5.15.0-1025.31
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< 5.15.0-1025.31~20.04.2
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1087.96~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1074.85 | < 5.15.0-1021.23
linux-raspi-5.4< 5.4.0-1074.85~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1124.132 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1028.31
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1026.30~20.04.2
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1142.152

Show all 84

Debian1 product

linux< 5.19.11-1

Linux1 product

linux_kernel< 5.19.7

3 vendors · 86 products

References

28 links

bugs.chromium.org/p/project-zero/issues/detail?id=2351REPORTExploitMailing ListThird Party Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.7REPORTMailing ListPatchVendor Advisory
github.com/torvalds/linux/commit/2555283eb40df89945557273121e9393ef9b542bREPORTPatchThird Party Advisory
git.kernel.org/cgit/…REPORTMailing ListPatchVendor Advisory
googleprojectzero.blogspot.com/2022/12/exploiting-CVE-2022-42703-bringing-back-the-stack-attack.htmlExploitTechnical DescriptionThird Party Advisory
ubuntu.com/security/CVE-2022-42703REPORT
git.kernel.org/linus/2555283eb40df89945557273121e9393ef9b542bREPORT
ubuntu.com/security/notices/USN-5728-1Advisory
ubuntu.com/security/notices/USN-5728-2Advisory
ubuntu.com/security/notices/USN-5728-3Advisory

Show all 28 references

ubuntu.com/security/notices/USN-5755-1Advisory
ubuntu.com/security/notices/USN-5756-1Advisory
ubuntu.com/security/notices/USN-5757-1Advisory
ubuntu.com/security/notices/USN-5757-2Advisory
ubuntu.com/security/notices/USN-5758-1Advisory
ubuntu.com/security/notices/USN-5756-2Advisory
ubuntu.com/security/notices/USN-5755-2Advisory
ubuntu.com/security/notices/USN-5773-1Advisory
ubuntu.com/security/notices/USN-5756-3Advisory
ubuntu.com/security/notices/USN-5774-1Advisory
ubuntu.com/security/notices/USN-5779-1Advisory
ubuntu.com/security/notices/USN-5789-1Advisory
ubuntu.com/security/notices/USN-5916-1Advisory
www.cve.org/CVERecord?id=CVE-2022-42703REPORT
security-tracker.debian.org/tracker/CVE-2022-42703Advisory
nvd.nist.gov/vuln/detail/CVE-2022-42703OvalAdvisory
cert-portal.siemens.com/productcert/html/ssa-831302.html
cert-portal.siemens.com/productcert/html/ssa-794697.html