Answer in brief
CVE-2026-53337 records a Unknown severity vulnerability in net: bonding: fix NULL pointer dereference in bond_do_ioctl(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <1b7558c85493467b2ea20738866b822db6442034 || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <b02b2e3e876c18733b868a29064abd11cdbf8feb || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <66693957bacd1c9dae6188a7312d6be69a221f2d || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <a629418d463fb50d132a1aa063b0105857311e5f || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <bcb8fad90f27300add583a8371db504b766d95c7 || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <b0878106ddc486375084145848ff255dedfff46a || >=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <a764b0e8317a863006e05732e1aefe821b9d8c2d | 1b7558c85493467b2ea20738866b822db6442034, b02b2e3e876c18733b868a29064abd11cdbf8feb, 66693957bacd1c9dae6188a7312d6be69a221f2d, a629418d463fb50d132a1aa063b0105857311e5f, c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba, bcb8fad90f27300add583a8371db504b766d95c7, b0878106ddc486375084145848ff255dedfff46a, a764b0e8317a863006e05732e1aefe821b9d8c2d |
| Linux/Linuxgeneric | 5.3 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Jul 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 1, 2026
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.
Quoted source text, attributed separately from HOL analysis.