CVE-2024-49568 net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg
A remote attacker can cause a kernel crash by sending a malicious SMC proposal message with invalid offset values, requiring a kernel patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-49568?
CVE-2024-49568 is a critical memory corruption vulnerability in Linux kernel, published on 11 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg
When receiving proposal msg in server, the fields v2_ext_offset/ eid_cnt/ism_gid_cnt in proposal msg are from the remote client and can not be fully trusted. Especially the field v2_ext_offset, once exceed the max value, there has the chance to access wrong address, and crash may happen.
This patch checks the fields v2_ext_offset/eid_cnt/ism_gid_cnt before using them.
Which versions are affected by CVE-2024-49568?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-49568?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-49568 being exploited?
There is no known exploitation of CVE-2024-49568 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-68541, BELL-CVE-2024-49568, DEBIAN-CVE-2024-49568, GHSA-rgx8-6674-j479, ROOT-OS-DEBIAN-11-CVE-2024-49568, ROOT-OS-DEBIAN-12-CVE-2024-49568 and 2 more.