CVE-2026-43092
5.5 MEDIUMIn the Linux kernel, the following vulnerability has been resolved: xsk: validate MTU against usable frame size on bind AF_XDP bind cur...
Published: 2026-05-06 · Last updated: 2026-05-19
Severity and scoring
- CVSS
- 5.5 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
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).
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-43092
- [Patch]https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133
- [Patch]https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9
- [Patch]https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6
- [Patch]https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1
- [Patch]https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2
Related CVEs
Same vendor
- CVE-2026-46273 — In the Linux kernel, the following vulnerability has been resolved: ibmveth: Disable GSO for packets with small MSS Some physical adapt... (8.6 HIGH)
- CVE-2026-46272 — In the Linux kernel, the following vulnerability has been resolved: coresight: tmc-etr: Fix race condition between sysfs and perf mode ... (4.7 MEDIUM)
- CVE-2026-46271 — In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: do WoW offloads only on primary link In case of multi... (7.8 HIGH)
- CVE-2026-46270 — In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() ... (8.4 HIGH)
- CVE-2026-46269 — In the Linux kernel, the following vulnerability has been resolved: pinctrl: canaan: k230: Fix NULL pointer dereference when parsing dev... (5.5 MEDIUM)