ALSA: serial-u16550: Check card index validity at probe
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: serial-u16550: Check card index validity at probe serial-u16550 driver blindly trusts that the given devptr->id value is within the proper card index range at probe. It's OK for the devices the driver itself creates at the module probe time, but if the device is bound manually via sysfs interface, this could be -1 as "none", and this leads to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.16 and later | 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.16 and later Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-80965
- 2026-10-03 Alias added: GHSA-r836-8rc4-5h49
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/41a952304cc8a308748e3f58462c879f2a9c4340
- https://git.kernel.org/stable/c/cc0f757d017f4271f137c77e130314bb23792347
- https://git.kernel.org/stable/c/1cb30691dc893aafcbc1e211e94764014c0f5d12
- https://git.kernel.org/stable/c/487ede9b648fc0eb15866f408c41aac2c57f85d5
- https://git.kernel.org/stable/c/fbf3fb097e66fc1874e54ecc46d600d9325480d6
- https://git.kernel.org/stable/c/7555e83d7738e65dc83921e3c85bbdc081f08f2f
- https://git.kernel.org/stable/c/6d6fdb24fe2eaf6174fc502284c6e1dc5f7242ba
- https://git.kernel.org/stable/c/e0fb960b227fcdebe22e4f26c9486d60943c0424
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Sources
- CVE-2026-80965 · CVE Program
- CVE-2026-80965 · NVD
- FIRST EPSS
- GHSA-r836-8rc4-5h49 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-80965 · Red Hat security data · CC BY 4.0
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