Security readout for executives and security teams
Plain-English summary
A Linux GFS2 error path can destroy the same work queue twice when filesystem initialization fails. This may crash or destabilize an affected system and, under the supplied CVSS assessment, could compromise confidentiality, integrity, and availability. Triggering requires local interaction and user involvement; the supplied evidence does not establish remote exploitation.
Executive priority
Prioritize affected GFS2 servers and shared-storage infrastructure because kernel instability could disrupt critical workloads. Treat as high priority where GFS2 is operationally exposed, but avoid assuming internet-wide risk: the supplied vector is local and requires user interaction. Establish vendor-confirmed version boundaries before broad emergency action.
Technical view
During a failed gfs2_fill_super() operation, gfs2_gl_hash_clear() destroys a work queue, but later cleanup may destroy it again. The cited kernel fix nulls the pointer after destruction and checks it before later cleanup. The supplied CVSS v3.1 score is 7.8 with local attack vector, low complexity, no privileges, and user interaction required.
Likely exposure
Exposure is most likely on systems running an affected Linux kernel with GFS2 available or used, particularly where failed GFS2 mount initialization can occur. The bundle identifies Linux 6.11-related versions but does not provide sufficiently clear release boundaries; confirm exact affected and fixed versions with the kernel or distribution vendor.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no provided source reports active exploitation or a public exploit. The CVSS vector describes a local, low-complexity condition requiring user interaction but no privileges. How an attacker would reliably reach the failing initialization path is not established by the supplied evidence.
Researcher notes
The essential defect is cleanup-state mismanagement after gfs2_fill_super() failure, producing a second destroy_workqueue() call. The remediation adds pointer invalidation and a NULL guard. The bundle lacks CWE classification, detailed trigger prerequisites, distribution package mappings, proof-of-concept evidence, and active-exploitation reporting, limiting exploitability assessment.
Mitigation direction
- Identify systems using or exposing GFS2 and record their exact kernel and distribution package versions.
- Consult the Linux kernel and distribution vendor advisories for confirmed affected and fixed release boundaries.
- Upgrade to a vendor-supported kernel containing the cited double-destroy fixes.
- Restrict unnecessary local access and GFS2 mount capability until affected systems are remediated.
Validation and detection
- Compare installed kernel packages against vendor-confirmed affected and fixed versions.
- Verify whether GFS2 is enabled, loaded, configured, or used on each potentially affected host.
- Confirm the deployed kernel includes either cited stable fix or the vendor's documented backport.
- Review system logs for GFS2 initialization failures, kernel warnings, crashes, or cleanup-related faults.
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
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ATT&CK lookup starting points
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CVE-2024-49956 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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/a5336035728d77efd76306940d742a6f23debe68CVE reference, Linux
- https://git.kernel.org/stable/c/6cb9df81a2c462b89d2f9611009ab43ae8717841CVE 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.