CVE - CVE-2024-26844

CVE-ID
CVE-2024-26844	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 URL:https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 MISC:https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 URL:https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 MISC:https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b URL:https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b MISC:https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b URL:https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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