kernel: Improper Update of Reference Count
CVE-2022-1678 is a high-severity improper update of reference count vulnerability in kernel, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected kernel versions: 4.18; 4.19 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 2.94% chance of exploitation within 30 days, higher than 87% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of kernel you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Kernel | kernel | 4.18; 4.19 and earlier | Not stated |
| Linux | Linux Kernel | 4.18 through 4.19 | Not stated |
| NetApp | Active Iq Unified Manager | Not specified in the record | Not stated |
| NetApp | Cloud Volumes Ontap Mediator | Not specified in the record | Not stated |
| NetApp | E-series Santricity OS Controller | 11.0 through 11.70.2 | Not stated |
| NetApp | Element Software | Not specified in the record | Not stated |
| NetApp | Hci Management Node | Not specified in the record | Not stated |
| NetApp | Solidfire | Not specified in the record | Not stated |
| NetApp | Storagegrid | Not specified in the record | Not stated |
| NetApp | Bootstrap OS | Not specified in the record | Not stated |
| NetApp | H300s Firmware | Not specified in the record | Not stated |
| NetApp | H500s Firmware | Not specified in the record | Not stated |
| NetApp | H700s Firmware | Not specified in the record | Not stated |
| NetApp | H300e Firmware | Not specified in the record | Not stated |
| NetApp | H500e Firmware | Not specified in the record | Not stated |
| NetApp | H700e Firmware | Not specified in the record | Not stated |
| NetApp | H410s Firmware | Not specified in the record | Not stated |
| NetApp | H410c Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.9 | Medium | CNA (openanolis.org) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
An issue was discovered in the Linux Kernel from 4.18 to 4.19, an improper update of sock reference in TCP pacing can lead to memory/netns leak, which can be used by remote clients.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Update of Reference Count
The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count.
More Improper Update of Reference Count vulnerabilities (CWE-911)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- bugzilla.openanolis.cn/show_bug.cgi?id=61Issue Tracking, Third Party Advisory
- gitee.com/anolis/cloud-kernel/commit/bed537da691bPermissions Required
- github.com/torvalds/linux/commit/0a70f118475e037732557796accd0878a00fc25aThird Party Advisory
Third-party and government advisories
- anas.openanolis.cn/cves/detail/CVE-2022-1678Third Party Advisory
- anas.openanolis.cn/errata/detail/ANSA-2022:0143Third Party Advisory
- security.netapp.com/advisory/ntap-20220715-0001/Third Party Advisory
Other vulnerabilities in kernel
- 7.5 High severity
- 7.8 High severity
- 8.1 High severity
- 7.1 High severity
- 8.1 High severity
- 8.1 High severity
Recent Improper Update of Reference Count vulnerabilities
- 7.8 High severity
- 7.5 High severity
Spotted an error? Tell us.