CVE-2026-43092

MEDIUM EPSS 2.3%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: xsk: validate MTU against usable frame size on bind AF_XDP bind currently accepts zero-copy pool configurations without verifying that the device MTU fits into the usable frame space provided by the UMEM chunk. This becomes a problem since we started to respect tailroom which is subtracted from chunk_size (among with headroom). 2k chunk size might not provide enough space for standard 1500 MTU, so let us catch such settings at bind time. Furthermore, validate whether underlying HW will be able to satisfy configured MTU wrt XSK's frame size multiplied by supported Rx buffer chain length (that is exposed via net_device::xdp_zc_max_segs).

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
2.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥6.6  –  <6.6.136
linuxlinux_kernel*≥6.7  –  <6.12.83
linuxlinux_kernel*≥6.13  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2
    Patch