CVE - CVE-2024-35827

CVE-ID
CVE-2024-35827	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: io_uring/net: fix overflow check in io_recvmsg_mshot_prep() The "controllen" variable is type size_t (unsigned long). Casting it to int could lead to an integer underflow. The check_add_overflow() function considers the type of the destination which is type int. If we add two positive values and the result cannot fit in an integer then that's counted as an overflow. However, if we cast "controllen" to an int and it turns negative, then negative values can fit into an int type so there is no overflow. Good: 100 + (unsigned long)-4 = 96 <-- overflow Bad: 100 + (int)-4 = 96 <-- no overflow I deleted the cast of the sizeof() as well. That's not a bug but the cast is unnecessary.
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/0c8c74bb59e7d77554016efc34c2d10376985e5e URL:https://git.kernel.org/stable/c/0c8c74bb59e7d77554016efc34c2d10376985e5e MISC:https://git.kernel.org/stable/c/59a534690ecc3af72c6ab121aeac1237a4adae66 URL:https://git.kernel.org/stable/c/59a534690ecc3af72c6ab121aeac1237a4adae66 MISC:https://git.kernel.org/stable/c/868ec868616438df487b9e2baa5a99f8662cc47c URL:https://git.kernel.org/stable/c/868ec868616438df487b9e2baa5a99f8662cc47c MISC:https://git.kernel.org/stable/c/8ede3db5061bb1fe28e2c9683329aafa89d2b1b4 URL:https://git.kernel.org/stable/c/8ede3db5061bb1fe28e2c9683329aafa89d2b1b4 MISC:https://git.kernel.org/stable/c/b6563ad0d599110bd5cf8f56c47d279c3ed796fe URL:https://git.kernel.org/stable/c/b6563ad0d599110bd5cf8f56c47d279c3ed796fe
Assigning CNA
kernel.org
Date Record Created
20240517	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 (20240517)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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