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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-23359 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stack-out-of-bounds write in devmap get_upper_ifindexes() iterates over all upper devices and writes their indices into an array without checking bounds. Also the callers assume that the max number of upper devices is MAX_NEST_DEV and allocate excluded_devices[1+MAX_NEST_DEV] on the stack, but that assumption is not correct and the number of upper devices could be larger than MAX_NEST_DEV (e.g., many macvlans), causing a stack-out-of-bounds write. Add a max parameter to get_upper_ifindexes() to avoid the issue. When there are too many upper devices, return -EOVERFLOW and abort the redirect. To reproduce, create more than MAX_NEST_DEV(8) macvlans on a device with an XDP program attached using BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS. Then send a packet to the device to trigger the XDP redirect path.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/5000e40acc8d0c36ab709662e32120986ac22e7e kernel.org Patch 
https://git.kernel.org/stable/c/75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2 kernel.org Patch 
https://git.kernel.org/stable/c/88df604f0d16a692867582350ce3f2fcd22243f1 kernel.org Patch 
https://git.kernel.org/stable/c/8a95fb9df1105b1618872c2846a6c01e3ba20b45 kernel.org Patch 
https://git.kernel.org/stable/c/b7bf516c3ecd9a2aae2dc2635178ab87b734fef1 kernel.org Patch 
https://git.kernel.org/stable/c/ca831567908fd3f73cf97d8a6c09a5054697a182 kernel.org Patch 
https://git.kernel.org/stable/c/d2c31d8e03d05edc16656e5ffe187f0d1da763d7 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-23359
NVD Published Date:
03/25/2026
NVD Last Modified:
04/24/2026
Source:
kernel.org