5.5

CVE-2024-39506: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-39506DEBIAN-CVE-2024-39506
Published 12-07-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-39506 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 35 · Related 30
DLA-4008-1DSA-5730-1DSA-5731-1RHSA-2024:7000RHSA-2024:7001SUSE-SU-2024:2892-1

Timeline

  1. 12-07-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

0.00 pp

From 0.29% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu127 products
  • linuxAll versions (No fix recorded) | < 5.4.0-195.215 | < 5.15.0-121.131 | < 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1132.142 | < 5.15.0-1069.75 | < 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1f233f327913f3dee0602cba9c64df1903772b55, < 87d6bdc006f0cbf297a3b2ad6e40ede4c3ee5dc2 | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < dcc7440f32c7a26b067aff6e7d931ec593024a79 | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < cbf18d8128a753cb632bef39470d19befd9c7347 | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < a86490a3712cc513113440a606a0e77130abd47c | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < f1ab15a09492a5ae8ab1e2c35ba2cf9e150d25ee | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < fd2b613bc4c508e55c1221c6595bb889812a4fea | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < a6f4d0ec170a46b5f453cacf55dff5989b42bbfa | ≥ 1f233f327913f3dee0602cba9c64df1903772b55, < c44711b78608c98a3e6b49ce91678cd0917d5349 | 4.15
  • linux_kernel≥ 4.15, < 4.19.317 | ≥ 4.20, < 5.4.279 | ≥ 5.5, < 5.10.221 | ≥ 5.11, < 5.15.162 | ≥ 5.16, < 6.1.95 | ≥ 6.2, < 6.6.35 | ≥ 6.7, < 6.9.6 | 6.10:rc1 | 6.10:rc2 | 6.10:rc3
Debian1 product
  • linux< 6.1.99-1 | < 6.9.7-1

3 vendors · 130 products

References

32 links
Show all 32 references