Security readout for executives and security teams
Plain-English summary
This Linux kernel issue can make systems hang during unloading of the NVMe over Fibre Channel module. It affects availability, not data confidentiality or integrity. Exploitation requires local high privileges, so business urgency is mainly for environments using NVMe-FC where maintenance, driver reloads, or kernel module operations could disrupt service.
Executive priority
Treat as a targeted availability risk for Linux storage infrastructure, not an internet-scale emergency. Patch through normal kernel maintenance, with higher priority for NVMe-FC production systems where a maintenance hang could extend outages.
Technical view
The nvme-fc module exit path had a race between controller deletion and ID cleanup. The fix removes unnecessary ida_destroy cleanup, relies on nvme_delete_ctrl cleanup, flushes nvme_delete_wq before module exit, and removes an unused workqueue. CVSS is 4.4 with local, high-privilege, availability-only impact.
Likely exposure
Exposure is most likely on Linux systems using the nvme-fc driver for NVMe over Fibre Channel, especially where privileged users or automation unload kernel modules. General Linux hosts not using nvme-fc are less likely to be exposed.
Exploitation context
The provided sources do not show active exploitation, and KEV is false. The described failure is reproducible by testing and causes a hang during module unload. It requires local high privileges, limiting attacker reach but still posing operational availability risk.
Researcher notes
The record maps to CWE-415, but the observable operational concern is a module unload hang from cleanup synchronization. Affected-version evidence is limited to the CVE bundle and kernel stable commits; validate against distribution backports rather than upstream version strings alone.
Mitigation direction
- Apply Linux kernel or distribution updates containing the nvme-fc stable fixes.
- Prioritize storage hosts using NVMe over Fibre Channel.
- Follow vendor or distribution advisories for exact fixed package versions.
- Restrict module unload capability to trusted administrators and controlled automation.
- Avoid unnecessary nvme-fc module unloads on production systems until patched.
Validation and detection
- Inventory Linux kernel versions across storage and virtualization hosts.
- Check whether the nvme-fc module is present, loaded, or operationally required.
- Confirm vendor changelogs mention CVE-2024-26846 or the referenced stable commits.
- Test kernel updates in staging before production rollout.
- Review maintenance automation for nvme-fc unload or driver reload operations.
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-415: 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-2024-26846 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
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/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:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H0.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/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/4f2c95015ec2a1899161be6c0bdaecedd5a7bfb2CVE reference, Linux
- https://git.kernel.org/stable/c/0bf567d6d9ffe09e059bbdfb4d07143cef42c75cCVE reference, Linux
- https://git.kernel.org/stable/c/085195aa90a924c79e35569bcdad860d764a8e17CVE reference, Linux
- https://git.kernel.org/stable/c/baa6b7eb8c66486bd64608adc63fe03b30d3c0b9CVE reference, Linux
- https://git.kernel.org/stable/c/c0882c366418bf9c19e1ba7f270fe377a9bf5d67CVE reference, Linux
- https://git.kernel.org/stable/c/70fbfc47a392b98e5f8dba70c6efc6839205c982CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
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.
Double Free
Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.