CVE-2022-49307

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Source
https://cve.org/CVERecord?id=CVE-2022-49307
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49307.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49307
Downstream
Related
Published
2025-02-26T02:10:39.151Z
Modified
2026-03-12T03:24:58.822746Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()
Details

In the Linux kernel, the following vulnerability has been resolved:

tty: synclinkgt: Fix null-pointer-dereference in slgtclean()

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:detachhdlcprotocol+0x2a/0x3e0 [ 25.077709] Call Trace: [ 25.077924] <TASK> [ 25.078108] unregisterhdlcdevice+0x16/0x30 [ 25.078481] slgtcleanup+0x157/0x9f0 [synclinkgt]

Fix this by checking whether the 'info->netdev' is a null pointer first.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49307.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
705b6c7b34f2621f95f606d0e683daa10cdb8eb9
Fixed
50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d
Fixed
078212ad15dbd88840c82c97f12c93d83703c8fd
Fixed
ba08cbc5b53e151d0acf1930fb526fc65b7f3e65
Fixed
f6e07eb7ebec53ffe81fc2489589320fbe4a6b75
Fixed
d68d5e68b7f64de7170f8e04dd9b995c36b2c71c
Fixed
8a95696bdc0e13f8980f05b54a3b9081963d1256
Fixed
ddd67751ab86c6a65f95c35293c42f85a42ac05d
Fixed
1ceb4ca9543a8a788febf6bc8dad2e605e172d5e
Fixed
689ca31c542687709ba21ec2195c1fbce34fd029

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49307.json"