CVE-2024-50258 net: fix crash when config small gso_max_size/gso_ipv4_max_size
A local attacker can cause a kernel crash by configuring small GSO max sizes, leading to an integer underflow and subsequent BUG_ON trigger.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-50258?
CVE-2024-50258 is a medium-severity vulnerability in Linux kernel, published on 9 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: fix crash when config small gso_max_size/gso_ipv4_max_size
Config a small gso_max_size/gso_ipv4_max_size will lead to an underflow in sk_dst_gso_max_size(), which may trigger a BUG_ON crash, because sk->sk_gso_max_size would be much bigger than device limits. Call Trace: tcp_write_xmit tso_segs = tcp_init_tso_segs(skb, mss_now); tcp_set_skb_tso_segs tcp_skb_pcount_set // skb->len = 524288, mss_now = 8 // u16 tso_segs = 524288/8 = 65535 -> 0 tso_segs = DIV_ROUND_UP(skb->len, mss_now) BUG_ON(!tso_segs) Add check for the minimum value of gso_max_size and gso_ipv4_max_size.
Weakness: CWE-191
Which versions are affected by CVE-2024-50258?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50258?
Apply the vendor's patch.
Is CVE-2024-50258 being exploited?
There is no known exploitation of CVE-2024-50258 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53333, AZL-53361, BELL-CVE-2024-50258, DEBIAN-CVE-2024-50258, GHSA-4qfr-cjvm-qrcj, ROOT-OS-DEBIAN-11-CVE-2024-50258 and 2 more.