net: hso: fix null-ptr-deref during tty device unregistration (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.26 % · percentile 17 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: net: hso: fix null-ptr-deref during tty device unregistration Multiple ttys try to claim the same the minor number causing a double unregistration of the same device. The first unregistration succeeds but the next one results in a null-ptr-deref. The get_free_serial_index() function returns an available minor number but doesn't assign it immediately. The assignment is done by the caller later. But before this assignment, calls to get_free_serial_index() would return the same minor number. Fix this by modifying get_free_serial_index to assign the minor number immediately after one is found to be and rename it to obtain_minor() to better reflect what it does. Similary, rename set_serial_by_index() to release_minor() and modify it to free up the minor number of the given hso_serial. Every obtain_minor() should have corresponding release_minor() call.
Weaknesses (CWE)
- CWE-476 — NULL Pointer Dereference
References
- https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449
- https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee
- https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4
- https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36
- https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723
- https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac
- https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a
- https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-33552
- GCVE · GCVE-0-2021-46904
CERT-FR advisories
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0716 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0458 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0440 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0420 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0265 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0242 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 2.6.27 < 4.4.268cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.9.268cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10.0 < 4.14.232cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15.0 < 4.19.187cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20.0 < 5.4.112cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5.0 < 5.10.30cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11.0 < 5.11.14
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 < a462067d7c8e6953a733bf5ade8db947b1bb5449 ; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 < 145c89c441d27696961752bf51b323f347601bee ; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 < caf5ac93b3b5d5fac032fc11fbea680e115421b4 ; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 < 92028d7a31e55d53e41cff679156b9432cffcb36 ; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 < 4a2933c88399c0ebc738db39bbce3ae89786d723 ; affected 72dc1c096c7051a48ab1dbb12f71976656b55eb5 < dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac |
| Linux · Linux | affected 2.6.27 ; unaffected 0 < 2.6.27 ; unaffected 4.4.268 ≤ 4.4.* ; unaffected 4.9.268 ≤ 4.9.* ; unaffected 4.14.232 ≤ 4.14.* ; unaffected 4.19.187 ≤ 4.19.* |
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 |