CVE-2026-23206

MEDIUM EPSS 1.8%
Published Feb 14, 20264mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 14, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the device reports zero interfaces (either due to hardware configuration or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10) instead of NULL. Later in dpaa2_switch_probe(), the NAPI initialization unconditionally accesses ethsw->ports[0]->netdev, which attempts to dereference ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic. Add a check to ensure num_ifs is greater than zero after retrieving device attributes. This prevents the zero-sized allocations and subsequent invalid pointer dereference.

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
1.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥5.13  –  <5.15.200
linuxlinux_kernel*≥5.16  –  <6.1.163
linuxlinux_kernel*≥6.2  –  <6.6.124
linuxlinux_kernel*≥6.7  –  <6.12.70
linuxlinux_kernel*≥6.13  –  <6.18.10
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66
    Patch