CVE-2026-53337net: bonding: fix NULL pointer dereference in bond_do_ioctl()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before 1b7558c85493467b2ea20738866b822db6442034; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before b02b2e3e876c18733b868a29064abd11cdbf8feb; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before 66693957bacd1c9dae6188a7312d6be69a221f2d; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before a629418d463fb50d132a1aa063b0105857311e5f; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before bcb8fad90f27300add583a8371db504b766d95c7; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before b0878106ddc486375084145848ff255dedfff46a; from e2a7420df2e01370b40e4cf7b85ab9a885c6d755 before a764b0e8317a863006e05732e1aefe821b9d8c2d | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.3 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 5 more ranges | NVD |
References
- https://git.kernel.org/stable/c/1b7558c85493467b2ea20738866b822db6442034patch
- https://git.kernel.org/stable/c/b02b2e3e876c18733b868a29064abd11cdbf8febpatch
- https://git.kernel.org/stable/c/66693957bacd1c9dae6188a7312d6be69a221f2dpatch
- https://git.kernel.org/stable/c/a629418d463fb50d132a1aa063b0105857311e5fpatch
- https://git.kernel.org/stable/c/c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21bapatch
- https://git.kernel.org/stable/c/bcb8fad90f27300add583a8371db504b766d95c7patch
- https://git.kernel.org/stable/c/b0878106ddc486375084145848ff255dedfff46apatch
- https://git.kernel.org/stable/c/a764b0e8317a863006e05732e1aefe821b9d8c2dpatch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.