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CVE Record

CVE-2024-27396: net: gtp: Fix Use-After-Free in gtp_dellink

In the Linux kernel, the following vulnerability has been resolved: net: gtp: Fix Use-After-Free in gtp_dellink Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal of gtp_dellink, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-27396 is a Linux kernel memory safety flaw in the GTP networking code. A cleanup path can free data while it is still being walked, creating a use-after-free condition. The sources do not provide CVSS, confirmed impact, or active exploitation evidence.

Executive priority

Track and patch through normal kernel maintenance unless GTP networking is used in critical environments. Raise priority where vulnerable kernels are internet-adjacent, telecom-facing, or embedded in Siemens or Debian LTS-managed systems.

Technical view

The Linux kernel GTP link deletion path, gtp_dellink, used an RCU traversal where call_rcu could allow the grace period to complete during traversal. The kernel fix changes the traversal to a safe hlist iterator to prevent use-after-free of the key.

Likely exposure

Exposure is limited to systems running affected Linux kernel builds with the GTP networking code present or enabled. The CVE record lists multiple affected kernel version lines, but distro backports can change status, so validate against vendor kernel advisories.

Exploitation context

The source bundle does not show CISA KEV listing, public exploitation, exploit availability, or a proof of concept. Treat exploitation status as unconfirmed, not actively exploited based on the provided evidence.

Researcher notes

Evidence is strongest for root cause and fix mechanics from Linux stable references. Missing CVSS, CWE, and exploit context limit impact assessment. Version data should be interpreted through vendor backport status, not upstream kernel numbers alone.

Mitigation direction

  • Apply Linux kernel updates containing the referenced stable fixes.
  • Use Debian LTS advisories for Debian-based affected systems.
  • Check Siemens advisories for listed Siemens product exposure.
  • For other distributions, follow vendor kernel security guidance.
  • Prioritize systems using or exposing GTP-related networking features.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and containers hosts.
  • Check whether kernels include the referenced stable fix commits.
  • Confirm distribution security advisories mark CVE-2024-27396 fixed.
  • Identify systems with GTP kernel module or related networking usage.
  • Record exceptions where vendor status is unclear or unsupported.
Prepared
Confidence
medium
Sources
12

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.

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CVE-2024-27396 mapping review

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

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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
3ADP providers
13Source 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
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux043a283d24f40fea4c8a8d06b0e2694c8e372200, c185e1d6e2752a4b656c3ca878c525fa11f55757, 94dc550a5062030569d4aa76e10e50c8fc001930, 94dc550a5062030569d4aa76e10e50c8fc001930, 94dc550a5062030569d4aa76e10e50c8fc001930, 94dc550a5062030569d4aa76e10e50c8fc001930, 94dc550a5062030569d4aa76e10e50c8fc001930, 94dc550a5062030569d4aa76e10e50c8fc001930, a29c4303930bc0c25ae6a4f365dcdef71447b4ea, 4.19.93, 5.4.8, 4.14.162unaffected
LinuxLinux5.5, 0, 4.19.313, 5.4.275, 5.10.216, 5.15.158, 6.1.90, 6.6.30, 6.8.9, 6.9affected
Weakness

CWE details

No CWE listed

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