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Vulnerability · Published Apr 2, 2024 · Assigned by Linux

CVE-2023-52633um: time-travel: fix time corruption

Medium 5.0

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.0Medium
Exploit odds (30 days)0.2%top 86.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In 'basic' time-travel mode (without =inf-cpu or =ext), we still get timer interrupts. These can happen at arbitrary points in time, i.e. while in timer_read(), which pushes time forward just a little bit. Then, if we happen to get the interrupt after calculating the new time to push to, but before actually finishing that, the interrupt will set the time to a value that's incompatible with the forward, and we'll crash because time goes backwards when we do the forwarding. Fix this by reading the time_travel_time, calculating the adjustment, and doing the adjustment all with interrupts disabled.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.82-1DEBIAN-CVE-2023-52633
Debian:13linux6.7.7-1DEBIAN-CVE-2023-52633
Debian:14linux6.7.7-1DEBIAN-CVE-2023-52633
Ubuntu:22.04:LTSlinux5.15.0-106.116UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux5.15.0-106.116USN-6766-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1061.67USN-6766-3
Ubuntu:22.04:LTSlinux-aws5.15.0-1061.67UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-azure5.15.0-1063.72USN-6766-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1063.72UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-azure-6.56.5.0-1022.23~22.04.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1063.72.1USN-6766-1
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1063.72.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-gcp5.15.0-1059.67UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-gcp5.15.0-1059.67USN-6766-1
Ubuntu:22.04:LTSlinux-gcp-6.56.5.0-1022.24~22.04.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-gke5.15.0-1058.63USN-6766-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1058.63UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1044.51USN-6766-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1044.51UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-hwe-6.56.5.0-41.41~22.04.2UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-ibm5.15.0-1054.57USN-6766-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1054.57UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1057.63UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1057.63USN-6795-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1058.63USN-6766-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1058.63UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-106.116USN-6766-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-106.116UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.56.5.0-41.41.1~22.04.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1054.55USN-6766-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1054.55UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-nvidia-6.56.5.0-1021.22UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1026.26UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1015.15UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-oem-6.56.5.0-1024.25UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-oracle5.15.0-1059.65USN-6766-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1059.65UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-oracle-6.56.5.0-1024.24~22.04.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-raspi5.15.0-1054.57UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-raspi5.15.0-1054.57USN-6766-2
Ubuntu:22.04:LTSlinux-riscv-6.56.5.0-40.40.1~22.04.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-starfive-6.56.5.0-1015.16~22.04.1UBUNTU-CVE-2023-52633
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1030.34UBUNTU-CVE-2023-52633

Affected products (as reported)

VendorProductVersions
Linux Linux 065038706f77a56754e8f0c2556dab7e22dfe577 – before 0c7478a2da3f5fe106b4658338873d50c86ac7ab065038706f77a56754e8f0c2556dab7e22dfe577 – before 4f7dad73df4cdb2b7042103d3922745d040ad025065038706f77a56754e8f0c2556dab7e22dfe577 – before de3e9d8e8d1ae0a4d301109d1ec140796901306c065038706f77a56754e8f0c2556dab7e22dfe577 – before b427f55e9d4185f6f17cc1e3296eb8d0c4425283065038706f77a56754e8f0c2556dab7e22dfe577 – before abe4eaa8618bb36c2b33e9cdde0499296a23448c
Linux Linux 5.3

References