LiveActive security incident?Get immediate response
CVE Record

CVE-2022-48962: net: hisilicon: Fix potential use-after-free in hisi_femac_rx()

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

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel memory-safety bug in the HiSilicon FEMAC network receive code. A network buffer may be freed by normal kernel processing and then accessed afterward. The record does not provide CVSS, confirmed impact, or exploit details, so urgency depends on whether affected kernels and this driver are present.

Executive priority

Prioritize through normal kernel patch management unless asset inventory shows exposed HiSilicon FEMAC systems in sensitive or externally reachable environments. The business risk is unclear because severity, exploitation, and impact details are not provided in the cited sources.

Technical view

CVE-2022-48962 fixes a potential use-after-free in hisi_femac_rx(). After skb is passed to napi_gro_receive(), it may be freed; later dereferencing skb can trigger use-after-free. The source lists Linux kernel stable fixes and affected kernel version data, but no CWE, CVSS, or detailed threat model.

Likely exposure

Most relevant to Linux systems using the HiSilicon FEMAC network driver. Exposure should be confirmed by kernel version, kernel configuration, loaded driver, and hardware inventory. Generic Linux hosts without this driver path active are less likely exposed, but the bundle does not provide complete distribution package mapping.

Exploitation context

The source bundle marks KEV as false and cites no active exploitation. It does not include a proof of concept, attacker prerequisites, or reliable impact assessment. Treat this as a kernel memory-safety issue requiring inventory validation rather than an internet-wide emergency based on current evidence.

Researcher notes

Key uncertainty is exploitability. The bug is in the RX path and involves skb lifetime after napi_gro_receive(), but the bundle does not establish remote triggerability, privilege requirements, crash likelihood, or code-execution potential. Validate by code review and vendor-specific patch mapping, not assumptions.

Mitigation direction

  • Apply vendor or distribution kernel updates containing the listed stable fixes.
  • Prioritize systems with HiSilicon FEMAC hardware or the hisi_femac driver enabled.
  • Check Linux distribution advisories for backported fixes and package-specific version mapping.
  • If updating is delayed, reduce exposure of affected devices according to vendor guidance.

Validation and detection

  • Inventory Linux kernel versions against the affected and fixed records in the CVE bundle.
  • Confirm whether the hisi_femac or HiSilicon FEMAC driver is built, loaded, or required.
  • Review distribution changelogs for CVE-2022-48962 or the referenced stable commits.
  • Verify updated systems boot the intended fixed kernel after patching.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2022-48962 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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
LinuxLinux542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056, 542ae60af24f02e130e62cb3b7c23163a2350056unaffected
LinuxLinux4.8, 0, 4.9.336, 4.14.302, 4.19.269, 5.4.227, 5.10.159, 5.15.83, 6.0.13, 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.