VYPR
← All advisories
Unrated severityNVD Advisory· Published Feb 26, 2025· Updated Dec 23, 2025

tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()

CVE-2022-49307

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] [ 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.

Affected products

128

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

9

News mentions

0

No linked articles in our index yet.