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Fencer Vulns
medium 5.5

CVE-2022-48908 json

net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe()

published 2024-08-22 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-53787

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

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

net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe()

During driver initialization, the pointer of card info, i.e. the variable 'ci' is required. However, the definition of 'com20020pci_id_table' reveals that this field is empty for some devices, which will cause null pointer dereference when initializing these devices.

The following log reveals it:

[ 3.973806] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] [ 3.973819] RIP: 0010:com20020pci_probe+0x18d/0x13e0 [com20020_pci] [ 3.975181] Call Trace: [ 3.976208] local_pci_probe+0x13f/0x210 [ 3.977248] pci_device_probe+0x34c/0x6d0 [ 3.977255] ? pci_uevent+0x470/0x470 [ 3.978265] really_probe+0x24c/0x8d0 [ 3.978273] __driver_probe_device+0x1b3/0x280 [ 3.979288] driver_probe_device+0x50/0x370

Fix this by checking whether the 'ci' is a null pointer first.

Patch / fix

  • Linux Linux 4.9.305, 4.14.270, 4.19.233, 5.4.183, 5.10.104, 5.15.27, 5.16.13, 5.17
  • linux Debian 14, Debian 13, Debian 12 5.16.14-1

debian advisories DEBIAN-CVE-2022-48908

  • linux Ubuntu 18.04 LTS 4.15.0-177.186
  • linux Ubuntu 20.04 LTS 5.4.0-117.132
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1128.137
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1078.84
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1078.84
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1026.29
  • linux-iot Ubuntu 20.04 LTS 5.4.0-1004.6
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1114.117

ubuntu advisories UBUNTU-CVE-2022-48908

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-48908 updated cvss 5.5

kernel: net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe()

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.