tty: skip cdev_del() when no cdev is registered
Priority LOW 22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 6 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated. Serial core keeps the port so setserial can still use it, and later removal passes the NULL cdev slot to cdev_del(), causing a NULL-pointer dereference. Only delete the cdev when the slot is not NULL.
Why it matters now
EPSS 0.00215 11th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.12.114 +3Red Hat: 6 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2.6, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90335
- 2026-10-03 Alias added: GHSA-5wc4-c9q8-2q27
- 2026-10-15 Affected versions changed · Red Hat
- 2026-10-15 CVSS score added · Red Hat
- 2026-10-16 Fix available: Linux/Linux@2af4c46b429907edc8cb069c78fca1d950120b98, Linux/[email protected] · CNA
- 2026-10-16 1 new reference · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/Linux@21031bd0d662549412378110c989b164feb6e4be, Linux/[email protected], Linux/[email protected] +1 · CNA
- 2026-10-21 2 new references · CNA
- 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68 · CNA
- 2026-10-30 1 new reference · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 6
- https://git.kernel.org/stable/c/6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68
- https://git.kernel.org/stable/c/ea3d2fae7c1d6492145976553817d22e8ef69a0e
- https://git.kernel.org/stable/c/21031bd0d662549412378110c989b164feb6e4be
- https://git.kernel.org/stable/c/2af4c46b429907edc8cb069c78fca1d950120b98
- https://git.kernel.org/stable/c/3dbf85ef40b6366ba15e882f7536cdc98bea579a
- https://git.kernel.org/stable/c/c3b5623fd97648f2747444aa8932ae604662df93
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Sources
- CVE-2026-90335 · CVE Program
- CVE-2026-90335 · NVD
- FIRST EPSS
- GHSA-5wc4-c9q8-2q27 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-90335 · 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