CVE - CVE-2024-49978

CVE-ID
CVE-2024-49978	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: gso: fix udp gso fraglist segmentation after pull from frag_list Detect gso fraglist skbs with corrupted geometry (see below) and pass these to skb_segment instead of skb_segment_list, as the first can segment them correctly. Valid SKB_GSO_FRAGLIST skbs - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or more frag_list skbs hold exactly one segment - all but the last must be gso_size Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify these skbs, breaking these invariants. In extreme cases they pull all data into skb linear. For UDP, this causes a NULL ptr deref in __udpv4_gso_segment_list_csum at udp_hdr(seg->next)->dest. Detect invalid geometry due to pull, by checking head_skb size. Don't just drop, as this may blackhole a destination. Convert to be able to pass to regular skb_segment.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/080e6c9a3908de193a48f646c5ce1bfb15676ffc URL:https://git.kernel.org/stable/c/080e6c9a3908de193a48f646c5ce1bfb15676ffc MISC:https://git.kernel.org/stable/c/33e28acf42ee863f332a958bfc2f1a284a3659df URL:https://git.kernel.org/stable/c/33e28acf42ee863f332a958bfc2f1a284a3659df MISC:https://git.kernel.org/stable/c/3cd00d2e3655fad3bda96dc1ebf17b6495f86fea URL:https://git.kernel.org/stable/c/3cd00d2e3655fad3bda96dc1ebf17b6495f86fea MISC:https://git.kernel.org/stable/c/a1e40ac5b5e9077fe1f7ae0eb88034db0f9ae1ab URL:https://git.kernel.org/stable/c/a1e40ac5b5e9077fe1f7ae0eb88034db0f9ae1ab MISC:https://git.kernel.org/stable/c/af3122f5fdc0d00581d6e598a668df6bf54c9daa URL:https://git.kernel.org/stable/c/af3122f5fdc0d00581d6e598a668df6bf54c9daa
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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