Security readout for executives and security teams
Plain-English summary
This is a Linux kernel driver flaw in ixgbe EEE linkmode handling. The code used the wrong mapping table, which can cause incorrect bit setting and possible out-of-bounds memory access. The published score is high because local, low-privileged access may affect confidentiality and availability.
Executive priority
Treat as a high-priority kernel maintenance item for Linux infrastructure using ixgbe. It is not described as remotely exploitable or actively exploited in the provided sources, but kernel memory safety issues with high confidentiality and availability impact should not wait for routine quarterly patching.
Technical view
In ixgbe, supported and advertised EEE linkmode bitmaps were populated using ixgbe_lp_map instead of ixgbe_ls_map. The maps have different sizes and purposes, creating potential CWE-125 out-of-bounds access. The fix changes those loops to use ixgbe_ls_map and keeps ixgbe_lp_map for link partner advertised mapping.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions where the ixgbe driver and EEE linkmode code are present. The CVSS vector is local, low complexity, low privileges, no user interaction, with high confidentiality and availability impact.
Exploitation context
The provided bundle does not show KEV listing or active exploitation. Based on CVSS, exploitation is local and requires low privileges. Evidence is insufficient to claim remote exploitation, public weaponization, or broad exploitation in the wild.
Researcher notes
The key condition is the wrong map used for supported and advertised EEE linkmode bitmaps. Review affected kernel trees around the three stable commits and validate whether deployed kernels include the ixgbe_ls_map correction. The source evidence does not provide crash traces, proof of concept, or exploitability details.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced stable fixes.
- Prioritize hosts using ixgbe-backed network interfaces.
- Track distribution advisories mapping this CVE to fixed kernel packages.
- Reboot into the fixed kernel after applying updates.
- If updates are delayed, follow vendor guidance for temporary risk reduction.
Validation and detection
- Inventory Linux kernel versions on potentially affected hosts.
- Identify systems where the ixgbe driver is loaded or required.
- Confirm the running kernel includes one of the referenced stable fixes.
- Verify vendor package advisories reference CVE-2025-39922.
- After patching, confirm the host booted into the updated kernel.
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.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-39922 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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/682105ab63826fb7ca7c112b42b478d156fbb19fCVE reference, Linux
- https://git.kernel.org/stable/c/129c1cb8a081a02d99267cb51708f1326395f4e8CVE reference, Linux
- https://git.kernel.org/stable/c/b7e5c3e3bfa9dc8af75ff6d8633ad7070e1985e4CVE 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.