vulnerability
Ubuntu: (Multiple Advisories) (CVE-2023-21400): Linux kernel vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:M/C:C/I:C/A:C) | Jul 13, 2023 | Aug 31, 2023 | Mar 27, 2026 |
Severity
7
CVSS
(AV:L/AC:L/Au:M/C:C/I:C/A:C)
Published
Jul 13, 2023
Added
Aug 31, 2023
Modified
Mar 27, 2026
Description
In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.
Solutions
ubuntu-upgrade-linux-image-5-15-0-1026-gkeopubuntu-upgrade-linux-image-5-15-0-1031-nvidiaubuntu-upgrade-linux-image-5-15-0-1031-nvidia-lowlatencyubuntu-upgrade-linux-image-5-15-0-1036-ibmubuntu-upgrade-linux-image-5-15-0-1036-raspiubuntu-upgrade-linux-image-5-15-0-1038-intel-iotgubuntu-upgrade-linux-image-5-15-0-1040-gcpubuntu-upgrade-linux-image-5-15-0-1040-gkeubuntu-upgrade-linux-image-5-15-0-1040-kvmubuntu-upgrade-linux-image-5-15-0-1041-oracleubuntu-upgrade-linux-image-5-15-0-1043-awsubuntu-upgrade-linux-image-5-15-0-1045-azureubuntu-upgrade-linux-image-5-15-0-1045-azure-fdeubuntu-upgrade-linux-image-5-15-0-82-genericubuntu-upgrade-linux-image-5-15-0-82-generic-64kubuntu-upgrade-linux-image-5-15-0-82-generic-lpaeubuntu-upgrade-linux-image-5-15-0-82-lowlatencyubuntu-upgrade-linux-image-5-15-0-82-lowlatency-64kubuntu-upgrade-linux-image-5-4-0-1048-iotubuntu-upgrade-linux-image-5-4-0-1058-xilinx-zynqmpubuntu-upgrade-linux-image-5-4-0-1085-ibmubuntu-upgrade-linux-image-5-4-0-1098-bluefieldubuntu-upgrade-linux-image-5-4-0-1122-raspiubuntu-upgrade-linux-image-5-4-0-1126-kvmubuntu-upgrade-linux-image-5-4-0-1137-oracleubuntu-upgrade-linux-image-5-4-0-1139-awsubuntu-upgrade-linux-image-5-4-0-1142-gcpubuntu-upgrade-linux-image-5-4-0-1143-azureubuntu-upgrade-linux-image-5-4-0-205-genericubuntu-upgrade-linux-image-5-4-0-205-generic-lpaeubuntu-upgrade-linux-image-5-4-0-205-lowlatencyubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-lts-20-04ubuntu-upgrade-linux-image-aws-lts-22-04ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-cvmubuntu-upgrade-linux-image-azure-fde-lts-22-04ubuntu-upgrade-linux-image-azure-lts-20-04ubuntu-upgrade-linux-image-azure-lts-22-04ubuntu-upgrade-linux-image-bluefieldubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-lts-20-04ubuntu-upgrade-linux-image-gcp-lts-22-04ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-20-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-hwe-20-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-20-04ubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-5-15ubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-15ubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-lts-20-04ubuntu-upgrade-linux-image-intelubuntu-upgrade-linux-image-intel-iotgubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-lowlatency-hwe-20-04ubuntu-upgrade-linux-image-nvidiaubuntu-upgrade-linux-image-nvidia-lowlatencyubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oem-20-04ubuntu-upgrade-linux-image-oem-20-04bubuntu-upgrade-linux-image-oem-20-04cubuntu-upgrade-linux-image-oem-20-04dubuntu-upgrade-linux-image-oem-osp1ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-lts-20-04ubuntu-upgrade-linux-image-oracle-lts-22-04ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-hwe-18-04ubuntu-upgrade-linux-image-raspi-nolpaeubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-virtual-hwe-20-04ubuntu-upgrade-linux-image-xilinx-zynqmp
References
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.