Security readout for executives and security teams
Plain-English summary
CVE-2025-40091 is a Linux kernel memory lifetime bug in the ixgbe network driver. When an affected Intel 10GbE adapter driver is removed, the kernel can access memory after it was freed. The public record does not provide CVSS, confirmed exploitation, or broad business impact details.
Executive priority
Treat this as a targeted kernel stability risk for systems using ixgbe, not as a confirmed internet-scale emergency. Patch through normal kernel maintenance, faster for critical network infrastructure where adapter resets or driver maintenance occur.
Technical view
The ixgbe_remove() path called devlink_free() before later cleanup still used the embedded ixgbe_adapter, causing a use-after-free. The KASAN trace shows ixgbe_reset_interrupt_capability() reached during PCI driver detach/sysfs unbind. The fix moves devlink_free() to the end of removal cleanup.
Likely exposure
Exposure is most likely on Linux systems running affected kernel versions with the ixgbe driver for supported Intel 10GbE adapters. The source bundle lists Linux kernel version evidence around 6.16, 6.17.5, and 6.18, but exact range semantics are incomplete here.
Exploitation context
No active exploitation is reported in the supplied sources, and KEV status is false. The observed trigger path is driver removal or unbinding, which generally implies local administrative or operational control rather than unauthenticated network reachability.
Researcher notes
The evidence supports a UAF in teardown ordering, not a remote packet-processing flaw. Impact beyond KASAN-detected memory misuse is not established in the supplied sources. Range metadata is incomplete, so rely on distro advisories or kernel stable commit inclusion for precise applicability.
Mitigation direction
- Apply the Linux stable kernel fixes referenced by the CVE record.
- Prioritize hosts using the ixgbe driver on affected kernel builds.
- Check your Linux vendor advisory for packaged fixed kernel versions.
- Avoid unnecessary ixgbe driver unbind or removal on vulnerable production hosts.
Validation and detection
- Inventory systems loading the ixgbe kernel module.
- Confirm running kernel versions against vendor fixed-release guidance.
- Review kernel logs for KASAN or use-after-free reports in ixgbe removal paths.
- Verify the referenced stable commits are present in deployed kernel sources or packages.
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-2025-40091 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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/df445969aa727cd64f3f29dc1f85fb60aca238d1CVE reference, Linux
- https://git.kernel.org/stable/c/5feef67b646d8f5064bac288e22204ffba2b9a4aCVE 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.