CVE-2022-49307
tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()
MEDIUM 5.5
At a glance
- Source
- NVD
- EPSS
- EPSS 0.29 % · percentile 22 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: tty: synclink_gt: Fix null-pointer-dereference in slgt_clean() When the driver fails at alloc_hdlcdev(), and then we remove the driver module, we will get the following splat: [ 25.065966] general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN PTI [ 25.066914] KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17] [ 25.069262] RIP: 0010:detach_hdlc_protocol+0x2a/0x3e0 [ 25.077709] Call Trace: [ 25.077924] <TASK> [ 25.078108] unregister_hdlc_device+0x16/0x30 [ 25.078481] slgt_cleanup+0x157/0x9f0 [synclink_gt] Fix this by checking whether the 'info->netdev' is a null pointer first.
Weaknesses (CWE)
- CWE-476 — NULL Pointer Dereference
References
- https://git.kernel.org/stable/c/50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d
- https://git.kernel.org/stable/c/078212ad15dbd88840c82c97f12c93d83703c8fd
- https://git.kernel.org/stable/c/ba08cbc5b53e151d0acf1930fb526fc65b7f3e65
- https://git.kernel.org/stable/c/f6e07eb7ebec53ffe81fc2489589320fbe4a6b75
- https://git.kernel.org/stable/c/d68d5e68b7f64de7170f8e04dd9b995c36b2c71c
- https://git.kernel.org/stable/c/8a95696bdc0e13f8980f05b54a3b9081963d1256
- https://git.kernel.org/stable/c/ddd67751ab86c6a65f95c35293c42f85a42ac05d
- https://git.kernel.org/stable/c/1ceb4ca9543a8a788febf6bc8dad2e605e172d5e
- https://git.kernel.org/stable/c/689ca31c542687709ba21ec2195c1fbce34fd029
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 | CISA-ADP |
| 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) |
| 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 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2022-54920
- GCVE · GCVE-0-2022-49307
CERT-FR advisories
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0336 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0307 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0252 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*< 4.9.318cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10 < 4.14.283cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.247cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.198cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.122cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.47cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 5.17.15cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.18 < 5.18.4
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d ; affected 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 078212ad15dbd88840c82c97f12c93d83703c8fd ; affected 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < ba08cbc5b53e151d0acf1930fb526fc65b7f3e65 ; affected 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < f6e07eb7ebec53ffe81fc2489589320fbe4a6b75 ; affected 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < d68d5e68b7f64de7170f8e04dd9b995c36b2c71c ; affected 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 8a95696bdc0e13f8980f05b54a3b9081963d1256 |
| Linux · Linux | affected 2.6.16 ; unaffected 0 < 2.6.16 ; unaffected 4.9.318 ≤ 4.9.* ; unaffected 4.14.283 ≤ 4.14.* ; unaffected 4.19.247 ≤ 4.19.* ; unaffected 5.4.198 ≤ 5.4.* |
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 |