CVE-2024-39506

MEDIUM EPSS 20.4%
Published Jul 12, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 12, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
20.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥4.15  –  <4.19.317
linuxlinux_kernel*≥4.20  –  <5.4.279
linuxlinux_kernel*≥5.5  –  <5.10.221
linuxlinux_kernel*≥5.11  –  <5.15.162
linuxlinux_kernel*≥5.16  –  <6.1.95
linuxlinux_kernel*≥6.2  –  <6.6.35
linuxlinux_kernel*≥6.7  –  <6.9.6
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any

References 9

  • git.kernel.org https://git.kernel.org/stable/c/87d6bdc006f0cbf297a3b2ad6e40ede4c3ee5dc2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6f4d0ec170a46b5f453cacf55dff5989b42bbfa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a86490a3712cc513113440a606a0e77130abd47c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c44711b78608c98a3e6b49ce91678cd0917d5349
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cbf18d8128a753cb632bef39470d19befd9c7347
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dcc7440f32c7a26b067aff6e7d931ec593024a79
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1ab15a09492a5ae8ab1e2c35ba2cf9e150d25ee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fd2b613bc4c508e55c1221c6595bb889812a4fea
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/87d6bdc006f0cbf297a3b2ad6e40ede4c3ee5dc2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a6f4d0ec170a46b5f453cacf55dff5989b42bbfa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a86490a3712cc513113440a606a0e77130abd47c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c44711b78608c98a3e6b49ce91678cd0917d5349
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cbf18d8128a753cb632bef39470d19befd9c7347
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dcc7440f32c7a26b067aff6e7d931ec593024a79
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1ab15a09492a5ae8ab1e2c35ba2cf9e150d25ee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fd2b613bc4c508e55c1221c6595bb889812a4fea
    Patch