CVE-2026-72113can: bcm: add missing device refcount for CAN filter removal
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% 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: can: bcm: add missing device refcount for CAN filter removal sashiko-bot remarked a problem with a concurrent device unregistration in isotp.c which also is present in the bcm.c code. A former fix for raw.c commit c275a176e4b6 ("can: raw: add missing refcount for memory leak fix") introduced a netdevice_tracker which solves the issue for bcm.c too. bcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on dev_get_by_index(ifindex) to re-find the device for an rx_op before unregistering its filter. If a concurrent NETDEV_UNREGISTER has already unlisted the device from the ifindex table, that lookup fails and can_rx_unregister() is silently skipped, leaving a stale CAN filter pointing at the soon-to-be-freed bcm_op/socket. Hold a netdev_hold()/netdev_put() tracked reference on op->rx_reg_dev from the moment the rx filter is registered in bcm_rx_setup() until it is unregistered in bcm_rx_unreg(), and use that reference directly in bcm_release() and bcm_delete_rx_op() instead of re-looking the device up by ifindex.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 months later
· 2 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < bd5232663524e94cc5aad861dca11e3db8e2ab6f
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < ee8b36d0faca08f35b889b6e9aa850695e5b8ba9
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < dcaee869913c7210cd47ed0a8f27349d7bdcdb7b
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 84aa4807816e405c1bf87114fc63e06d244281ef
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 633bda66fbf309f5de5e1ad6defe8e6b1d77a20f
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < b024c21c9066f6957b7d4a8f2037e4b000c5e041
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 04d23061bbf18d5d81022eb21e9d32e99d24468d
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < d59948293ea34b6337ce2b5febab8510de70048c
- affected 2.6.25
- unaffected < 2.6.25
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/bd5232663524e94cc5aad861dca11e3db8e2ab6f (opens in a new tab)
- https://git.kernel.org/stable/c/ee8b36d0faca08f35b889b6e9aa850695e5b8ba9 (opens in a new tab)
- https://git.kernel.org/stable/c/dcaee869913c7210cd47ed0a8f27349d7bdcdb7b (opens in a new tab)
- https://git.kernel.org/stable/c/84aa4807816e405c1bf87114fc63e06d244281ef (opens in a new tab)
- https://git.kernel.org/stable/c/633bda66fbf309f5de5e1ad6defe8e6b1d77a20f (opens in a new tab)
- https://git.kernel.org/stable/c/b024c21c9066f6957b7d4a8f2037e4b000c5e041 (opens in a new tab)
- https://git.kernel.org/stable/c/04d23061bbf18d5d81022eb21e9d32e99d24468d (opens in a new tab)
- https://git.kernel.org/stable/c/d59948293ea34b6337ce2b5febab8510de70048c (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-2026-59071 (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-2026-72113)Record last updated .