Security readout for executives and security teams
Plain-English summary
CVE-2024-36919 is a Linux kernel bnx2fc storage driver flaw that can trigger a kernel BUG and reboot while releasing Fibre Channel over Ethernet session resources. The provided sources show a crash/reboot impact, not data theft or remote code execution. Business urgency depends on whether affected Linux hosts use this driver and FCoE hardware paths.
Executive priority
Prioritize if the organization runs Linux servers connected to FCoE storage using bnx2fc, especially where unexpected reboots affect critical workloads. Otherwise, handle through normal kernel patch cycles after confirming the driver is absent or unused.
Technical view
The bnx2fc driver held spin_lock_bh while freeing uploaded session resources no longer used by firmware or driver. That path can hit BUG_ON() in vunmap during bnx2fc_free_session_resc, causing an invalid opcode kernel crash. Upstream stable commits remove the unnecessary lock across supported kernel branches.
Likely exposure
Exposure is most likely on Linux systems with the bnx2fc module and Broadcom FCoE offload/storage networking in use. General Linux systems not loading this driver are unlikely to be exposed. The version data lists multiple affected Linux kernel lines, but distro backports require vendor-specific checking.
Exploitation context
The bundle does not show CISA KEV listing, public exploitation, or weaponized exploit evidence. The described failure appears tied to session upload/resource release behavior in the storage driver. Treat this primarily as an availability risk until vendor advisories provide stronger exploitation evidence.
Researcher notes
Evidence supports a kernel availability bug in bnx2fc resource cleanup after session upload. CVSS, CWE, and detailed attack prerequisites are absent from the bundle. The affected-version data is broad and should be mapped to distro kernels through vendor advisories and backport records.
Mitigation direction
- Inventory Linux hosts loading the bnx2fc module or using FCoE offload storage.
- Apply vendor kernel updates containing the referenced upstream stable fixes.
- Prioritize storage servers and virtualization hosts where reboot causes business interruption.
- Check Debian LTS and hardware vendor advisories for packaged fixes.
- If unneeded, disable or avoid loading bnx2fc following vendor guidance.
Validation and detection
- Confirm running kernel package includes the relevant stable backport or newer fix.
- Check whether bnx2fc is loaded on production systems.
- Review logs for BUG_ON, vunmap, bnx2fc_free_session_resc, or unexpected reboots.
- Validate remediation first on representative storage-connected hosts.
- Track distro advisory status rather than relying only on upstream version numbers.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 468f3e3c
- Linux stable commit acd370c1
- Linux stable commit ad498539
- Linux stable commit 93aa5ccc
- Linux stable commit 1150606d
- Linux stable commit c885ab23
- Linux stable commit ea50941c
- Linux stable commit c214ed2a
- Debian LTS advisory DLA 3820-1
- Debian LTS advisory DLA 3819-1
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-2024-36919 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/468f3e3c15076338367b0945b041105b67cf31e3CVE reference, Linux
- https://git.kernel.org/stable/c/acd370c1fb86b7302c1cbb354a7c1cd9953768ebCVE reference, Linux
- https://git.kernel.org/stable/c/ad498539dda0816aadef384ec117bfea304c75c3CVE reference, Linux
- https://git.kernel.org/stable/c/93aa5ccc44781bdfef1bf0bc4c2c292d45251312CVE reference, Linux
- https://git.kernel.org/stable/c/1150606d47d711d5bfdf329a1a96ed7027085936CVE reference, Linux
- https://git.kernel.org/stable/c/c885ab23206b1f1ba0731ffe7c9455c6a91db256CVE reference, Linux
- https://git.kernel.org/stable/c/ea50941cd8c9f0b12f38b73d3b1bfeca660dd342CVE reference, Linux
- https://git.kernel.org/stable/c/c214ed2a4dda35b308b0b28eed804d7ae66401f9CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlCVE reference, CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00019.htmlCVE reference, CVE · x_transferred
- https://security.netapp.com/advisory/ntap-20240905-0009/CVE 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.