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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

CVE-2022-49004riscv: Sync efi page table's kernel mappings before switching

Medium 5.5

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 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 84.1% 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: riscv: Sync efi page table's kernel mappings before switching The EFI page table is initially created as a copy of the kernel page table. With VMAP_STACK enabled, kernel stacks are allocated in the vmalloc area: if the stack is allocated in a new PGD (one that was not present at the moment of the efi page table creation or not synced in a previous vmalloc fault), the kernel will take a trap when switching to the efi page table when the vmalloc kernel stack is accessed, resulting in a kernel panic. Fix that by updating the efi kernel mappings before switching to the efi page table.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.0.12-1DEBIAN-CVE-2022-49004
Debian:13linux6.0.12-1DEBIAN-CVE-2022-49004
Debian:14linux6.0.12-1DEBIAN-CVE-2022-49004
Ubuntu:22.04:LTSlinux5.15.0-67.74UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-aws5.15.0-1031.35UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure5.15.0-1034.41UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1034.41.1UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-gcp5.15.0-1030.37UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-gke5.15.0-1028.33UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1016.21UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-ibm5.15.0-1026.29UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1026.31UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-kvm5.15.0-1029.34UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-67.74UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-oracle5.15.0-1030.36UBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-raspi5.15.0-1025.27UBUNTU-CVE-2022-49004
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-49004
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-49004

Affected products (as reported)

VendorProductVersions
Linux Linux b91540d52a08b65eb6a2b09132e1bd54fa82754c – before fa7a7d185ef380546b4b1fed6f84f31dbae8cec7b91540d52a08b65eb6a2b09132e1bd54fa82754c – before 96f479383d92944406d4b3f2bc03c2f640def9f1b91540d52a08b65eb6a2b09132e1bd54fa82754c – before 3f105a742725a1b78766a55169f1d827732e62b8
Linux Linux 5.10

References