What’s Vulnerable › Vulnerabilities

CVE-2024-50258: net: fix crash when config small gso_max_size/gso_ipv4_max_size

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-09 · updated 2026-06-17
• Weakness: CWE-191

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.

Affected products

• Linux kernel: from 4.16 through 6.6.60; from 6.7 through 6.11.7; 6.12-rc1, 6.12-rc2, 6.12-rc3, 6.12-rc4, 6.12-rc5

References

• https://git.kernel.org/stable/c/90c8482a5d9791259ba77bfdc1849fc5128b4be7
• https://git.kernel.org/stable/c/9ab5cf19fb0e4680f95e506d6c544259bf1111c4
• https://git.kernel.org/stable/c/ac5977001eee7660c643f8e07a2de9001990b7b8
• https://git.kernel.org/stable/c/e72fd1389a5364bc6aa6312ecf30bdb5891b9486
• https://git.kernel.org/stable/c/e9365368b483328639c03fc730448dccd5a25b6b
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

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