Skip to main content
cve.nowby Sazabi
← All vulnerabilities
CVE-2026-53337

net: bonding: fix NULL pointer dereference in bond_do_ioctl()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix NULL pointer dereference in bond_do_ioctl() In bond_do_ioctl(), slave_dev is obtained via __dev_get_by_name() which can return NULL if the requested interface name does not exist. However, the subsequent slave_dbg() call is placed before the NULL check: slave_dev = __dev_get_by_name(net, ifr->ifr_slave); slave_dbg(bond_dev, slave_dev, "slave_dev=%p:\n", slave_dev); //here if (!slave_dev) return -ENODEV; The slave_dbg() macro expands to netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ...) which unconditionally dereferences slave_dev->name before the NULL check is performed. This results in a NULL pointer dereference kernel oops when a user calls bonding ioctl (e.g. SIOCBONDENSLAVE, SIOCBONDRELEASE, etc.) with a non-existent slave interface name. This is reachable from userspace via the bonding ioctl interface with CAP_NET_ADMIN capability, making it a potential local denial-of-service vector. Fix by moving the slave_dbg() call after the NULL check.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in 1b7558c85493467b2ea20738866b822db6442034; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in b02b2e3e876c18733b868a29064abd11cdbf8feb; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in 66693957bacd1c9dae6188a7312d6be69a221f2d; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in a629418d463fb50d132a1aa063b0105857311e5f; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in bcb8fad90f27300add583a8371db504b766d95c7; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in b0878106ddc486375084145848ff255dedfff46a; From e2a7420df2e01370b40e4cf7b85ab9a885c6d755 · fixed in a764b0e8317a863006e05732e1aefe821b9d8c2d

  • Linux Linux

    5.3

  • KernelLinux

    From 5.3.0 · fixed in 5.10.259; From 5.11.0 · fixed in 5.15.210; From 5.16.0 · fixed in 6.1.176; From 6.2.0 · fixed in 6.6.143; From 6.7.0 · fixed in 6.12.94; From 6.13.0 · fixed in 6.18.36; From 6.19.0 · fixed in 7.0.13

References 8

git.kernel.org