Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9b0fc3c054ff2eb13753104884f1045b5bb3a627 before 868ec868616438df487b9e2baa5a99f8662cc47c; affected 9b0fc3c054ff2eb13753104884f1045b5bb3a627 before 59a534690ecc3af72c6ab121aeac1237a4adae66; affected 9b0fc3c054ff2eb13753104884f1045b5bb3a627 before 0c8c74bb59e7d77554016efc34c2d10376985e5e; affected 9b0fc3c054ff2eb13753104884f1045b5bb3a627 before b6563ad0d599110bd5cf8f56c47d279c3ed796fe; affected 9b0fc3c054ff2eb13753104884f1045b5bb3a627 before 8ede3db5061bb1fe28e2c9683329aafa89d2b1b4 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.83 through 6.1.*; unaffected 6.6.23 through 6.6.*; unaffected 6.7.11 through 6.7.*; unaffected 6.8.2 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/868ec868616438df487b9e2baa5a99f8662cc47c
- https://git.kernel.org/stable/c/59a534690ecc3af72c6ab121aeac1237a4adae66
- https://git.kernel.org/stable/c/0c8c74bb59e7d77554016efc34c2d10376985e5e
- https://git.kernel.org/stable/c/b6563ad0d599110bd5cf8f56c47d279c3ed796fe
- https://git.kernel.org/stable/c/8ede3db5061bb1fe28e2c9683329aafa89d2b1b4
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/868ec868616438df487b9e2baa5a99f8662cc47c
- https://git.kernel.org/stable/c/59a534690ecc3af72c6ab121aeac1237a4adae66
- https://git.kernel.org/stable/c/0c8c74bb59e7d77554016efc34c2d10376985e5e
- https://git.kernel.org/stable/c/b6563ad0d599110bd5cf8f56c47d279c3ed796fe
- https://git.kernel.org/stable/c/8ede3db5061bb1fe28e2c9683329aafa89d2b1b4