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Vulnerability · Published Apr 17, 2024 · Assigned by Linux

CVE-2024-26844block: Fix WARNING in _copy_from_iter

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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.8% 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: block: Fix WARNING in _copy_from_iter Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.82-1DEBIAN-CVE-2024-26844
Debian:13linux6.7.7-1DEBIAN-CVE-2024-26844
Debian:14linux6.7.7-1DEBIAN-CVE-2024-26844
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-26844
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2024-26844

Affected products (as reported)

VendorProductVersions
Linux Linux 9124d3fe21b0947b03f4b87bcfb7acd675d6e85b – before 8fc80874103a5c20aebdc2401361aa01c817f75b9124d3fe21b0947b03f4b87bcfb7acd675d6e85b – before 0f1bae071de9967602807472921829a54b2e59569124d3fe21b0947b03f4b87bcfb7acd675d6e85b – before cbaf9be337f7da25742acfce325119e3395b1f1b9124d3fe21b0947b03f4b87bcfb7acd675d6e85b – before 13f3956eb5681a4045a8dfdef48df5dc4d9f58a6
Linux Linux 4.0

References