can: bcm: extend bcm_tx_lock usage for data and timer updates
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: can: bcm: extend bcm_tx_lock usage for data and timer updates Stage new CAN frame content for an existing tx op into a kmalloc()'d buffer and validate it there, mirroring the approach already used in bcm_rx_setup(). Only copy the validated data into op->frames while holding op->bcm_tx_lock, so bcm_can_tx() and bcm_tx_timeout_handler() can no longer observe a partially updated or unvalidated frame. Add a missing error path for memcpy_from_msg() when copying CAN frame data from userspace. Also move the kt_ival1/kt_ival2/ival1/ival2 updates in bcm_tx_setup() under op->bcm_tx_lock, and read kt_ival1/kt_ival2/count under the same lock in bcm_tx_set_expiry() and bcm_tx_timeout_handler(), closing the torn 64-bit ktime_t read on 32-bit platforms.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.238 to before 5.10.265; 5.15.185 to before 5.15.216; 6.1.141 to before 6.1.183; 6.6.93 to before 6.6.148; 6.12.31 to before 6.12.101; 5.4.294 to before 5.5; 6.14.9 to before 6.15 | 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 5.5, 6.15 | Patch available | CNA |
| Linux | Linux | 6.15 and later | 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.5, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.238 to before 5.10.265; 5.15.185 to before 5.15.216; 6.1.141 to before 6.1.183; 6.6.93 to before 6.6.148; 6.12.31 to before 6.12.101; 5.4.294 to before 5.5; 6.14.9 to before 6.15 Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 5.5, 6.15 Patch available CNA
- Linux VendorLinux Affected 6.15 and later Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.5, 7.2 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 5.5, 6.15
- Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-72119
- 2026-10-03 Alias added: GHSA-8pfg-cf9x-g4pr
- 2026-10-16 CISA SSVC decision points changed
- 2026-11-06 CVSS score changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/a538b072ee074c9b41b9d9c15a6861a963e30755
- https://git.kernel.org/stable/c/63422347b4c782f429748b2a09cd3cf3b77e6abd
- https://git.kernel.org/stable/c/37917e432e50b7de2b64230974380132a30f7270
- https://git.kernel.org/stable/c/52f06e7603780de100233713ddaf971d422e10ef
- https://git.kernel.org/stable/c/972fd66bb08fdef1090abe43196ca8da07216d13
- https://git.kernel.org/stable/c/bd46f55dec608daa44b45dcf3328517630ad8e40
- https://git.kernel.org/stable/c/337f966c00662d81ad82cf5a4bbb150b2e32c0d4
- https://git.kernel.org/stable/c/12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc
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Sources
- CVE-2026-72119 · CVE Program
- CVE-2026-72119 · NVD
- FIRST EPSS
- GHSA-8pfg-cf9x-g4pr · GitHub Advisory Database · CC BY 4.0
- CVE-2026-72119 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences