CVE-2026-53337net: bonding: fix NULL pointer dereference in bond_do_ioctl()
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
ID reserved
By Linux
- 22 days later
· 22 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < 1b7558c85493467b2ea20738866b822db6442034
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < b02b2e3e876c18733b868a29064abd11cdbf8feb
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < 66693957bacd1c9dae6188a7312d6be69a221f2d
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < a629418d463fb50d132a1aa063b0105857311e5f
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < bcb8fad90f27300add583a8371db504b766d95c7
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < b0878106ddc486375084145848ff255dedfff46a
- affected e2a7420df2e01370b40e4cf7b85ab9a885c6d755 – < a764b0e8317a863006e05732e1aefe821b9d8c2d
- affected 5.3
- unaffected < 5.3
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/1b7558c85493467b2ea20738866b822db6442034 (opens in a new tab)
- https://git.kernel.org/stable/c/b02b2e3e876c18733b868a29064abd11cdbf8feb (opens in a new tab)
- https://git.kernel.org/stable/c/66693957bacd1c9dae6188a7312d6be69a221f2d (opens in a new tab)
- https://git.kernel.org/stable/c/a629418d463fb50d132a1aa063b0105857311e5f (opens in a new tab)
- https://git.kernel.org/stable/c/c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba (opens in a new tab)
- https://git.kernel.org/stable/c/bcb8fad90f27300add583a8371db504b766d95c7 (opens in a new tab)
- https://git.kernel.org/stable/c/b0878106ddc486375084145848ff255dedfff46a (opens in a new tab)
- https://git.kernel.org/stable/c/a764b0e8317a863006e05732e1aefe821b9d8c2d (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-40971 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53337)Record last updated .