LiveActive security incident?Get immediate response
CVE Record

CVE-2021-47310: net: ti: fix UAF in tlan_remove_one

In the Linux kernel, the following vulnerability has been resolved: net: ti: fix UAF in tlan_remove_one priv is netdev private data and it cannot be used after free_netdev() call. Using priv after free_netdev() can cause UAF bug. Fix it by moving free_netdev() at the end of the function.

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 issue in the TI network driver cleanup path. The driver could use private network-device data after it had been freed, creating a use-after-free condition. The source bundle does not provide CVSS, practical impact, or exploitation evidence.

Executive priority

Track this as a kernel hygiene and asset-exposure item until impact details are clearer. It should rise in priority where affected kernels are deployed on exposed or hard-to-patch systems, but the provided evidence does not support emergency treatment.

Technical view

CVE-2021-47310 fixes tlan_remove_one by moving free_netdev() to the end of the function. The issue is a use-after-free involving netdev private data after free_netdev(). Affected Linux versions listed include 3.10 through 5.14, with multiple stable kernel commit references.

Likely exposure

Exposure is most likely on systems running affected Linux kernel builds that include the relevant TI tlan network driver code. The bundle does not state whether the driver must be loaded, whether specific hardware is required, or whether distributions backported the fix.

Exploitation context

The source bundle marks KEV as false and provides no cited evidence of active exploitation. It also does not describe attack vector, privileges required, reliability, or post-exploitation impact. Treat exploitation status as unknown, not confirmed.

Researcher notes

The core bug is lifetime ordering: priv is netdev private data and cannot safely be used after free_netdev(). The published fix reorders cleanup so free_netdev() occurs last. The bundle lacks CVSS, CWE, exploitability analysis, and distribution-specific affected package data.

Mitigation direction

  • Update affected Linux kernels using vendor-supported packages or fixed stable branches.
  • Check distribution advisories for backported fixes tied to the referenced kernel commits.
  • Prioritize systems where the TI tlan driver is present or enabled.
  • Avoid inventing compensating controls; follow kernel or distribution guidance.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Check whether kernel packages include one of the referenced stable fixes or vendor backports.
  • Identify systems with the tlan driver built, installed, or loaded.
  • Confirm remediation through package metadata, kernel changelogs, or vendor advisory mapping.
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-2021-47310 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
2ADP 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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49fa, 1e0a8b13d35510e711fdf72e9a3e30bcb2bd49faunaffected
LinuxLinux3.10, 0, 4.4.277, 4.9.277, 4.14.241, 4.19.199, 5.4.135, 5.10.53, 5.13.5, 5.14affected
Weakness

CWE details

No CWE listed

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