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CVE Record

CVE-2022-49015: net: hsr: Fix potential use-after-free

In the Linux kernel, the following vulnerability has been resolved: net: hsr: Fix potential use-after-free The skb is delivered to netif_rx() which may free it, after calling this, dereferencing skb may trigger use-after-free.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-49015 is a Linux kernel memory-safety bug in HSR networking. The kernel may use a packet buffer after it has been handed off and potentially freed. Business urgency depends on whether systems run affected kernel versions and use HSR. No provided source reports active exploitation.

Executive priority

Schedule remediation through the normal kernel patch process, escalating for environments using HSR or safety-critical networking. There is no cited evidence of active exploitation, but kernel memory-safety bugs should not remain untracked.

Technical view

In net/hsr, an skb passed to netif_rx() may be freed; later dereferencing that skb can trigger use-after-free. Linux stable commits resolve the issue. The CVE data has no CVSS, CWE, or detailed impact statement, so exploitability and blast radius are not fully defined.

Likely exposure

Potentially exposed assets are Linux systems, appliances, or embedded devices running affected kernel lines with HSR networking present or enabled. The record indicates fixes across stable branches including 4.9.335, 4.14.301, 4.19.268, 5.4.226, 5.10.158, 5.15.82, 6.0.12, and 6.1.

Exploitation context

The provided sources do not describe public exploitation, proof-of-concept code, or CISA KEV listing. Because this is kernel networking memory corruption, treat it as potentially serious, but prioritize based on HSR usage and kernel exposure.

Researcher notes

Evidence is limited to the CVE record and Linux stable commits. The record describes the root cause but not attacker requirements, privileges, or impact. Avoid assuming remote code execution or active exploitation without additional vendor analysis.

Mitigation direction

  • Upgrade to a vendor kernel containing the referenced stable fixes.
  • Prioritize systems that use or load HSR networking functionality.
  • If immediate upgrade is unavailable, check vendor guidance for safe workarounds.
  • Track distribution advisories for backported fixes and package names.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Check whether HSR functionality is enabled, configured, or module-loadable.
  • Confirm installed kernel includes the relevant stable fix or vendor backport.
  • Review vendor advisories for distribution-specific affected and fixed builds.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2022-49015 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
1ADP providers
9Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8d, f421436a591d34fa5279b54a96ac07d70250cc8dunaffected
LinuxLinux3.13, 0, 4.9.335, 4.14.301, 4.19.268, 5.4.226, 5.10.158, 5.15.82, 6.0.12, 6.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.