Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 6.1.80 |
References
- https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956Patch
- https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6Patch
- https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75bPatch
- https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1bPatch
- https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956Patch
- https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6Patch
- https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75bPatch
- https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1bPatch
FAQ
What is CVE-2024-26844?
CVE-2024-26844 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2024-26844?
CVE-2024-26844 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-26844?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.