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Vulnerability · Published Sep 5, 2022 · Assigned by mitre

CVE-2022-39842

Medium 6.1

In plain English

A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)0.6%top 51.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An issue was discovered in the Linux kernel before 5.19. In pxa3xx_gcu_write in drivers/video/fbdev/pxa3xx-gcu.c, the count parameter has a type conflict of size_t versus int, causing an integer overflow and bypassing the size check. After that, because it is used as the third argument to copy_from_user(), a heap overflow may occur. NOTE: the original discoverer disputes that the overflow can actually happen.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.19.6-1DEBIAN-CVE-2022-39842
Debian:13linux5.19.6-1DEBIAN-CVE-2022-39842
Debian:14linux5.19.6-1DEBIAN-CVE-2022-39842
Ubuntu:22.04:LTSlinux5.15.0-57.63USN-5792-1
Ubuntu:22.04:LTSlinux5.15.0-57.63UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-aws5.15.0-1027.31USN-5792-2
Ubuntu:22.04:LTSlinux-aws5.15.0-1027.31UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-azure5.15.0-1030.37UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-azure5.15.0-1030.37USN-5792-2
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1030.37.1USN-5792-2
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1030.37.1UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-gcp5.15.0-1026.33USN-5792-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1026.33UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-gke5.15.0-1024.29USN-5792-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1024.29UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1012.16UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1012.16USN-5792-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1022.25UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-ibm5.15.0-1022.25USN-5792-1
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1023.28UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-kvm5.15.0-1025.30USN-5792-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1025.30UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-57.63USN-5792-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-57.63UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1015.15UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-oracle5.15.0-1026.32USN-5792-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1026.32UBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-raspi5.15.0-1022.24USN-5792-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1022.24UBUNTU-CVE-2022-39842
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-39842
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-39842

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References