Security readout for executives and security teams
Plain-English summary
CVE-2022-49358 is a Linux kernel memory leak in the nf_tables netfilter code. A local user with some privileges could potentially consume kernel memory and cause a denial of service. It is not listed in KEV, and the provided sources do not show active exploitation.
Executive priority
Treat as a scheduled but important Linux kernel maintenance item. It can affect availability, especially on shared hosts, but sources do not support emergency response unless your environment exposes local users or privileged workloads broadly.
Technical view
The issue is CWE-401 in nf_tables flow rule transaction handling. The abort path released flow rule objects, but the commit path did not. Kernel stable commits update the code to destroy these objects before releasing the transaction. CVSS 3.1 is 5.5: local, low complexity, low privileges, no user interaction, availability impact only.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel builds with nf_tables/netfilter flow rule functionality available. Risk is higher on shared systems, container hosts, and environments where local users or workloads may have elevated network administration capabilities.
Exploitation context
The CVSS vector indicates local access and low privileges are required. The documented impact is availability loss, not data theft or code execution. The source bundle does not cite public exploitation or CISA KEV listing.
Researcher notes
Affected-version data in the source bundle is limited and includes kernel version markers plus stable commit references. Validate against distribution advisories because vendors frequently backport fixes without changing upstream version numbers.
Mitigation direction
- Apply vendor kernel updates that include the referenced stable fixes.
- Prioritize shared Linux hosts, container hosts, and internet-facing infrastructure with local user access.
- Restrict unnecessary local privileges and network administration capabilities until patched.
- If no package is available, monitor Linux distribution and kernel vendor guidance.
Validation and detection
- Inventory Linux kernel versions across servers, appliances, and container hosts.
- Confirm whether vendor kernels include the referenced nf_tables stable commits or backports.
- Check whether nf_tables/netfilter flow rule features are enabled or used.
- Track remediation through normal kernel package and reboot validation processes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-401: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-49358 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/5b8d63489c3b701eb2a76f848ec94d8cbc9373b9CVE reference, Linux
- https://git.kernel.org/stable/c/330c0c6cd2150a2d7f47af16aa590078b0d2f736CVE reference, Linux
- https://git.kernel.org/stable/c/e33d9bd563e71f6c6528b96008d65524a459c4dcCVE reference, Linux
- https://git.kernel.org/stable/c/80de9ea1f5b808a6601e91111fae601df2b26369CVE reference, Linux
- https://git.kernel.org/stable/c/ab9f34a30c23f656e76f4c5b83125a4e7b53c86eCVE reference, Linux
- https://git.kernel.org/stable/c/9dd732e0bdf538b1b76dc7c157e2b5e560ff30d3CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.