Security readout for executives and security teams
Plain-English summary
CVE-2025-39911 is a Linux kernel bug in the i40e network driver. When interrupt allocation fails during device startup, the cleanup path can free interrupts with the wrong identifier, causing kernel warnings and incorrect cleanup. The sources do not show remote code execution, privilege escalation, or active exploitation.
Executive priority
Treat this as routine kernel maintenance unless i40e-backed production networking is business-critical or hosts show related kernel warnings. There is no supplied evidence of active exploitation, but affected infrastructure should still receive normal security updates.
Technical view
The issue is in i40e_vsi_request_irq_msix(). If request_irq() fails after earlier successful iterations, free_irq() is called with a dev_id that does not match the original request_irq() dev_id. The kernel fix changes cleanup to use the same dev_id, preventing incorrect IRQ freeing in that error path.
Likely exposure
Exposure is mainly Linux systems running affected kernels with the i40e driver in use. Systems without this driver loaded, without matching network hardware, or already updated to a vendor kernel containing the stable fix are less likely to be exposed.
Exploitation context
The bundle reports no KEV listing and provides no cited evidence of active exploitation. The described condition depends on an IRQ allocation failure during i40e interface startup, so exploitation context appears operationally narrow based on the supplied sources.
Researcher notes
The public description identifies a cleanup bug, not a broadly reachable attack path. Risk assessment is limited by missing CVSS, CWE, and exploitability details. Validation should focus on affected kernel lineage, i40e module usage, and whether vendor packages carry the referenced stable backports.
Mitigation direction
- Update affected Linux kernels using vendor-supported packages containing the stable i40e fix.
- Review the Debian LTS advisory if managing Debian LTS systems.
- Prioritize systems where the i40e driver is loaded or required for production networking.
- Follow distribution guidance for maintenance windows and reboot requirements.
Validation and detection
- Check whether affected hosts load the i40e kernel module.
- Confirm the running kernel includes one of the referenced stable fixes or vendor backports.
- Review kernel logs for i40e IRQ cleanup warnings during interface startup.
- Verify distribution security advisories mark the installed kernel as fixed.
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-2025-39911 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/13ab9adef3cd386511c930a9660ae06595007f89CVE reference, Linux
- https://git.kernel.org/stable/c/6e4016c0dca53afc71e3b99e24252b63417395dfCVE reference, Linux
- https://git.kernel.org/stable/c/b9721a023df38cf44a88f2739b4cf51efd051f85CVE reference, Linux
- https://git.kernel.org/stable/c/b905b2acb3a0bbb08ad9be9984d8cdabdf827315CVE reference, Linux
- https://git.kernel.org/stable/c/23431998a37764c464737b855c71a81d50992e98CVE reference, Linux
- https://git.kernel.org/stable/c/a30afd6617c30aaa338d1dbcb1e34e7a1890085cCVE reference, Linux
- https://git.kernel.org/stable/c/c62580674ce5feb1be4f90b5873ff3ce50e0a1dbCVE reference, Linux
- https://git.kernel.org/stable/c/915470e1b44e71d1dd07ee067276f003c3521ee3CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlCVE reference, CVE
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.