tty: clear cdev pointer after cdev_add() failure (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 12 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: tty: clear cdev pointer after cdev_add() failure tty_cdev_add() drops the cdev reference when cdev_add() fails, but leaves driver->cdevs[index] pointing to freed memory. tty_unregister_device() later passes that stale pointer to cdev_del(), causing a use-after-free. Clear the slot after dropping the reference.
References
- https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb
- https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285
- https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae
- https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4
- https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9
- https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116
- https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077
- https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223
European references
- ENISA EUVD · EUVD-2026-81995
- GCVE · GCVE-0-2026-90334
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 < fb1de260033c215dba438973d82b48562bdc86bb ; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 < e9e64dd02fd68776afda00777591eca0c3984285 ; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 33a44333a9dfda044b0e233399b12ead7f8a90ae ; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 < d331c63570af61ef7aaf516b64a8d6f47518a3a4 ; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 < a83fcddf3c75d004f12aa13555bb73da19fb75a9 ; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 4f6bd79bb7e55095f09bec9b4eb6c09df1306116 |
| Linux · Linux | affected 4.3 ; unaffected 0 < 4.3 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |