Security readout for executives and security teams
Plain-English summary
This CVE concerns Linux kernel HID device handling, not an application bug. Public sources describe a fuzzer-triggered kernel warning that was removed because the value was already trimmed and logged. No public source in the bundle shows active exploitation, CVSS score, or a named business-impact scenario. Treat it as routine kernel/vendor patch management unless your platform vendor elevates it.
Executive priority
Routine priority for most organizations: include in normal Linux kernel and appliance firmware update cycles, then follow any Debian, Siemens, or platform-specific advisories that rate affected products higher.
Technical view
The issue is in Linux kernel HID output report handling. Syzkaller triggered WARN_ON() in implement() when an output report value exceeded a smaller field. The code already trims the value and logs hid_warn(), so upstream removed the WARN_ON() to avoid unnecessary kernel warning paths. Sources do not identify memory corruption, privilege escalation, or remote exploitation.
Likely exposure
Exposure is limited to systems running affected Linux kernel builds with HID support in scope. That may include servers, workstations, embedded devices, and appliances using vendor Linux kernels. Distribution and product vendors may backport fixes, so version-string matching alone is insufficient.
Exploitation context
The bundle attributes discovery to Syzkaller and shows no CISA KEV listing or other cited evidence of exploitation. The described trigger is a kernel warning during HID output report processing, not a documented remote attack chain. Any practical exposure depends on local HID/hiddev access and product-specific configuration.
Researcher notes
The source text says implement() masks the value before continuing and already emits hid_warn(); the patch removes a superfluous WARN_ON(). The supplied record has no CVSS vector, CWE, or exploit confirmation. Researchers should avoid assuming impact beyond a kernel warning without additional vendor analysis or reproducer details.
Mitigation direction
- Apply vendor-provided Linux kernel updates that include the referenced HID stable fixes.
- For Debian LTS systems, follow the linked Debian security advisory.
- For Siemens products, follow the relevant Siemens ProductCERT advisories.
- Where no fix is published, monitor vendor guidance and reduce unnecessary HID/hiddev exposure.
Validation and detection
- Inventory Linux kernel versions and vendor firmware baselines across affected assets.
- Check whether HID, USB HID, or hiddev functionality is enabled and reachable.
- Compare installed kernels against distribution advisories, not only upstream version numbers.
- Review kernel logs for matching HID WARN_ON reports when investigating related instability.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 955b3764671f
- Linux stable commit f9db5fbeffb9
- Linux stable commit 33f6832798dd
- Linux stable commit 8bac61934cd5
- Linux stable commit bfd546fc7fd7
- Linux stable commit 30f76bc468b9
- Linux stable commit 655c6de2f215
- Linux stable commit 4aa2dcfbad53
- Debian LTS advisory
- Siemens ProductCERT SSA-265688
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-2024-39509 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/955b3764671f3f157215194972d9c01a3a4bd316CVE reference, Linux
- https://git.kernel.org/stable/c/f9db5fbeffb951cac3f0fb1c2eeffb79785399caCVE reference, Linux
- https://git.kernel.org/stable/c/33f6832798dd3297317901cc1db556ac3ae80c24CVE reference, Linux
- https://git.kernel.org/stable/c/8bac61934cd563b073cd30b8cf6d5c758ab5ab26CVE reference, Linux
- https://git.kernel.org/stable/c/bfd546fc7fd76076f81bf41b85b51ceda30949fdCVE reference, Linux
- https://git.kernel.org/stable/c/30f76bc468b9b2cbbd5d3eb482661e3e4798893fCVE reference, Linux
- https://git.kernel.org/stable/c/655c6de2f215b61d0708db6b06305eee9bbfeba2CVE reference, Linux
- https://git.kernel.org/stable/c/4aa2dcfbad538adf7becd0034a3754e1bd01b2b5CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.htmlCVE reference, CVE
- https://cert-portal.siemens.com/productcert/html/ssa-265688.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.