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Unrated severityNVD Advisory· Published Jul 12, 2024· Updated Nov 3, 2025

liquidio: Adjust a NULL pointer handling path in lio_vf_rep_copy_packet

CVE-2024-39506

Description

In the Linux kernel, the following vulnerability has been resolved:

liquidio: Adjust a NULL pointer handling path in lio_vf_rep_copy_packet

In lio_vf_rep_copy_packet() pg_info->page is compared to a NULL value, but then it is unconditionally passed to skb_add_rx_frag() which looks strange and could lead to null pointer dereference.

lio_vf_rep_copy_packet() call trace looks like: octeon_droq_process_packets octeon_droq_fast_process_packets octeon_droq_dispatch_pkt octeon_create_recv_info ...search in the dispatch_list... ->disp_fn(rdisp->rinfo, ...) lio_vf_rep_pkt_recv(struct octeon_recv_info *recv_info, ...) In this path there is no code which sets pg_info->page to NULL. So this check looks unneeded and doesn't solve potential problem. But I guess the author had reason to add a check and I have no such card and can't do real test. In addition, the code in the function liquidio_push_packet() in liquidio/lio_core.c does exactly the same.

Based on this, I consider the most acceptable compromise solution to adjust this issue by moving skb_add_rx_frag() into conditional scope.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Affected products

157

Patches

8
87d6bdc006f0
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
a6f4d0ec170a
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
dcc7440f32c7
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
c44711b78608
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
cbf18d8128a7
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
fd2b613bc4c5
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
f1ab15a09492
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
a86490a3712c
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit

Vulnerability mechanics

Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

8

News mentions

0

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