CVE-2022-49307

MediumCVSS 5.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
LinuxLinux>= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < 50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < 078212ad15dbd88840c82c97f12c93d83703c8fd; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < ba08cbc5b53e151d0acf1930fb526fc65b7f3e65; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < f6e07eb7ebec53ffe81fc2489589320fbe4a6b75; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < d68d5e68b7f64de7170f8e04dd9b995c36b2c71c; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < 8a95696bdc0e13f8980f05b54a3b9081963d1256; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < ddd67751ab86c6a65f95c35293c42f85a42ac05d; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < 1ceb4ca9543a8a788febf6bc8dad2e605e172d5e; >= 705b6c7b34f2621f95f606d0e683daa10cdb8eb9, < 689ca31c542687709ba21ec2195c1fbce34fd029
LinuxLinux2.6.16

References

Timeline

Published
Feb 26, 2025
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2022-49307: Medium severity, CVSS 5.5 | Vulnix