Security readout for executives and security teams
Plain-English summary
CVE-2024-43890 is a Linux kernel tracing bug that can make a CPU hang. The issue occurs when a tracing map counter overflows, allowing inserts after the intended maximum and potentially causing an infinite loop with preemption disabled. The documented impact is availability, not data theft or privilege escalation.
Executive priority
Treat this as a normal-priority kernel availability fix unless exposed assets are high-criticality or multi-tenant. There is no cited active exploitation, but a CPU hang risk in the kernel can still disrupt production systems.
Technical view
In get_free_elt(), tracing_map->next_elt could overflow after reaching max_elts. That allowed additional entries until the map became full. A later __tracing_map_insert() into the full tracing_map could loop indefinitely while preemption is disabled, causing a CPU hang. Linux stable commits address this by stopping next_elt increments once max_elt is reached.
Likely exposure
Exposure is likely limited to systems running affected Linux kernel versions or vendor products that embed them. The source bundle lists Linux kernel versions and stable backport commits, plus Debian LTS advisories. Confirm exposure by matching deployed kernel versions and vendor firmware advisories.
Exploitation context
The source bundle does not show KEV listing or active exploitation. It describes a kernel availability flaw in the tracing subsystem. No public exploit status, required privileges, or remotely reachable attack path is established in the provided evidence.
Researcher notes
The core condition is counter overflow in tracing_map allocation state, followed by insertion behavior when the map has no empty entries. Evidence supports a denial-of-service outcome through CPU hang. The bundle does not establish exploit prerequisites, reachability, or privilege requirements.
Mitigation direction
- Update affected Linux kernels to vendor-supported fixed builds.
- Apply relevant Debian LTS kernel updates where Debian is in use.
- Check embedded-product vendor advisories before changing appliance firmware.
- Prioritize systems where local users, agents, or workloads can exercise kernel tracing paths.
- Monitor vendor guidance for any revised severity or exploitation information.
Validation and detection
- Inventory kernel versions across servers, containers hosts, appliances, and build images.
- Compare deployed versions with the CVE record and Linux stable fix commits.
- Check Debian LTS advisory applicability for Debian-based systems.
- Review vendor advisories for Siemens or other embedded Linux products in scope.
- After updates, verify systems boot the expected fixed kernel version.
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.
CVE-2024-43890 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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/302ceb625d7b990db205a15e371f9a71238de91cCVE reference, Linux
- https://git.kernel.org/stable/c/d3e4dbc2858fe85d1dbd2e72a9fc5dea988b5c18CVE reference, Linux
- https://git.kernel.org/stable/c/eb223bf01e688dfe37e813c8988ee11c8c9f8d0aCVE reference, Linux
- https://git.kernel.org/stable/c/cd10d186a5409a1fe6e976df82858e9773a698daCVE reference, Linux
- https://git.kernel.org/stable/c/788ea62499b3c18541fd6d621964d8fafbc4aec5CVE reference, Linux
- https://git.kernel.org/stable/c/a172c7b22bc2feaf489cfc6d6865f7237134fdf8CVE reference, Linux
- https://git.kernel.org/stable/c/236bb4690773ab6869b40bedc7bc8d889e36f9d6CVE reference, Linux
- https://git.kernel.org/stable/c/bcf86c01ca4676316557dd482c8416ece8c2e143CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.htmlCVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.htmlCVE reference, CVE
- https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlCVE reference, siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-613116.htmlCVE reference, siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-355557.htmlCVE reference, siemens-SADP
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.