Security readout for executives and security teams
Plain-English summary
A malformed or corrupted network timing packet can cause a Linux system using the Micrel LAN8814 network driver to dereference missing data and potentially crash. The documented impact is loss of availability, not data theft or modification. Systems not using the affected driver and hardware are unlikely to be exposed.
Executive priority
Treat as a high-priority availability issue for systems using LAN8814 hardware, especially operational or network infrastructure. Scope first because exposure depends on a specific driver path. Patch confirmed affected assets through supported kernel packages; broad emergency action across unrelated Linux systems is not supported by the supplied evidence.
Technical view
The LAN8814 receive and transmit timestamp functions call ptp_parse_header(), which may return NULL for abnormal or corrupted packets. The affected code subsequently uses that pointer without checking it. The kernel fixes add a NULL check. CVSS 3.1 is 7.5, reflecting network-reachable, low-complexity denial of service without privileges or user interaction.
Likely exposure
Exposure is concentrated in Linux systems using the Micrel LAN8814 PHY driver with affected kernel code and processing relevant PTP traffic. The supplied version list is flattened and does not clearly express branch ranges or fixed boundaries, so exact exposure must be confirmed against the linked stable commits and distributor advisories.
Exploitation context
The supplied record does not establish active exploitation, and the CVE is not listed as KEV. It describes a denial-of-service condition triggered by abnormal or corrupted packets. No evidence provided here demonstrates reliable exploitation, public weaponization, or impacts beyond availability.
Researcher notes
The finding was reported by Linux Verification Center using SVACE. Key review targets are lan8814_get_sig_rx(), lan8814_get_sig_tx(), and handling of NULL returns from ptp_parse_header(). The source bundle provides four stable commits but does not map each commit to an explicit branch or preserve complete version-range semantics.
Mitigation direction
- Identify systems using the Micrel LAN8814 PHY driver and affected Linux kernel code.
- Apply a vendor-supported kernel update containing the linked NULL-pointer checks.
- Check Linux distributor advisories for precise fixed versions applicable to each maintained branch.
- Prioritize exposed network appliances and systems where downtime would materially affect operations.
Validation and detection
- Inventory kernel versions, network hardware, and whether the LAN8814 driver is loaded or built in.
- Compare deployed kernel source or package changelogs with the four referenced stable fixes.
- Confirm updated systems boot successfully and retain expected LAN8814 networking and PTP functionality.
- Monitor kernel logs and availability alerts for crashes associated with Micrel PHY or PTP processing.
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
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CVE-2024-35891 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6LinuxVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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/10608161696c2768f53426642f78a42bcaaa53e8CVE reference, Linux
- https://git.kernel.org/stable/c/95c1016a2d92c4c28a9d1b6d09859c00b19c0ea4CVE reference, Linux
- https://git.kernel.org/stable/c/49767b0df276f12e3e7184601e09ee7430e252dcCVE reference, Linux
- https://git.kernel.org/stable/c/96c155943a703f0655c0c4cab540f67055960e91CVE reference, Linux
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.