Security readout for executives and security teams
Plain-English summary
A Linux storage driver can crash the entire system when a Fibre Channel link is disconnected under memory pressure. The failure is in the qla2xxx command-cleanup path. For affected storage servers, this can interrupt workloads and require recovery; the supplied evidence does not establish data theft or real-world exploitation.
Executive priority
Prioritize affected storage infrastructure because a kernel crash can disrupt critical workloads. Treat remediation as urgent where qla2xxx is active, especially on systems experiencing memory pressure or unstable Fibre Channel links. General-purpose Linux hosts without this driver path are less likely to be exposed.
Technical view
Under memory pressure, qla2xxx may fail to allocate an SRB during cable-pull recovery and not flush commands to SCSI. Upper layers can then modify scsi_cmnd; a later link loss may cause the driver to DMA-unmap an invalid SGL and dereference NULL. The upstream fix ensures commands are flushed during session teardown.
Likely exposure
Exposure is concentrated in Linux systems using the qla2xxx driver for Fibre Channel storage, particularly where link-loss events and memory pressure can coincide. The bundle identifies affected Linux versions from 4.11 through multiple later stable releases, but distribution backports may change actual exposure.
Exploitation context
The supplied sources do not report active exploitation, and the CVE is not listed as KEV. Triggering requires a specific storage-driver state involving memory pressure, failed recovery allocation, and repeated link loss.
Researcher notes
The documented outcome is a NULL-pointer kernel crash following incomplete command flushing. Although the supplied CVSS is 8.8 with confidentiality, integrity, and availability impacts, the narrative evidence directly demonstrates availability loss; it does not explain data disclosure or modification. Version status should be validated using distribution-specific advisories and backport records.
Mitigation direction
- Install a vendor-supported kernel containing the qla2xxx command-flush fix.
- Confirm distribution-specific fixed package versions because packaged kernels may contain backported fixes.
- Prioritize storage hosts that load qla2xxx and experience Fibre Channel link changes.
- Reduce avoidable cable or fabric disruptions during memory pressure until remediation is complete.
Validation and detection
- Inventory running kernels and identify hosts with the qla2xxx module loaded.
- Confirm the installed kernel contains a referenced stable fix or equivalent vendor backport.
- Review crash logs for qla_nvme_ls_req, __wake_up_common, NULL dereferences, and Fibre Channel port-loss messages.
- Test link-loss recovery only in a controlled, non-production environment after updating.
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
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CVE-2024-26931 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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/b73377124f56d2fec154737c2f8d2e839c237d5aCVE reference, Linux
- https://git.kernel.org/stable/c/d7a68eee87b05d4e29419e6f151aef99314970a9CVE reference, Linux
- https://git.kernel.org/stable/c/67b2d35853c2da25a8ca1c4190a5e96d3083c2acCVE reference, Linux
- https://git.kernel.org/stable/c/a859f6a8f4234b8ef62862bf7a92f1af5f8cd47aCVE reference, Linux
- https://git.kernel.org/stable/c/09c0ac18cac206ed1218b1fe6c1a0918e5ea9211CVE reference, Linux
- https://git.kernel.org/stable/c/8de1584ec4fe0ebea33c273036e7e0a05e65c81dCVE reference, Linux
- https://git.kernel.org/stable/c/8f0d32004e3a572bb77e6c11c2797c87f8c9703dCVE reference, Linux
- https://git.kernel.org/stable/c/ec7587eef003cab15a13446d67c3adb88146a150CVE reference, Linux
- https://git.kernel.org/stable/c/a27d4d0e7de305def8a5098a614053be208d1aa1CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlCVE reference, CVE · x_transferred
Products and packages named in the record
CWE details
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