5.5

CVE-2024-50258

net: fix crash when config small gso_max_size/gso_ipv4_max_size

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.16 <= 6.6.60
Linux ≫ Linux Kernel Version >= 6.7 <= 6.11.7
Linux ≫ Linux Kernel Version6.12 Updaterc1
Linux ≫ Linux Kernel Version6.12 Updaterc2
Linux ≫ Linux Kernel Version6.12 Updaterc3
Linux ≫ Linux Kernel Version6.12 Updaterc4
Linux ≫ Linux Kernel Version6.12 Updaterc5
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.106
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-191 Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

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