Executive Summary

Informations
Name CVE-2024-35827 First vendor Publication 2024-05-17
Vendor Cve Last vendor Modification 2024-05-17

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35827

Sources (Detail)

https://git.kernel.org/stable/c/0c8c74bb59e7d77554016efc34c2d10376985e5e
https://git.kernel.org/stable/c/59a534690ecc3af72c6ab121aeac1237a4adae66
https://git.kernel.org/stable/c/868ec868616438df487b9e2baa5a99f8662cc47c
https://git.kernel.org/stable/c/8ede3db5061bb1fe28e2c9683329aafa89d2b1b4
https://git.kernel.org/stable/c/b6563ad0d599110bd5cf8f56c47d279c3ed796fe
Source Url

Alert History

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0
1
Date Informations
2024-05-18 00:27:24
  • Multiple Updates
2024-05-17 21:27:24
  • First insertion