CVE-2022-49307
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 078212ad15dbd88840c82c97f12c93d83703c8fd | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < ba08cbc5b53e151d0acf1930fb526fc65b7f3e65 | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < f6e07eb7ebec53ffe81fc2489589320fbe4a6b75 | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < d68d5e68b7f64de7170f8e04dd9b995c36b2c71c | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 8a95696bdc0e13f8980f05b54a3b9081963d1256 | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < ddd67751ab86c6a65f95c35293c42f85a42ac05d | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 1ceb4ca9543a8a788febf6bc8dad2e605e172d5e | affected |
| Linux | Linux | 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 < 689ca31c542687709ba21ec2195c1fbce34fd029 | affected |
| Linux | Linux | 2.6.16 | affected |
| Linux | Linux | 0 < 2.6.16 | unaffected |
| Linux | Linux | 4.9.318 <= 4.9.* | unaffected |
| Linux | Linux | 4.14.283 <= 4.14.* | unaffected |
| Linux | Linux | 4.19.247 <= 4.19.* | unaffected |
| Linux | Linux | 5.4.198 <= 5.4.* | unaffected |
| Linux | Linux | 5.10.122 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.47 <= 5.15.* | unaffected |
| Linux | Linux | 5.17.15 <= 5.17.* | unaffected |
| Linux | Linux | 5.18.4 <= 5.18.* | unaffected |
| Linux | Linux | 5.19 <= * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
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
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