Security readout for executives and security teams
Plain-English summary
CVE-2024-26792 is a Linux kernel Btrfs bug where a failed snapshot operation can free the same anonymous device number twice. That can corrupt kernel bookkeeping for device identifiers. The public record does not provide a CVSS score or a fully characterized business impact.
Executive priority
Treat this as a targeted kernel maintenance item, not an internet-wide emergency based on current evidence. Prioritize systems that depend on Btrfs snapshots, especially production storage hosts, and confirm patch status through the operating system vendor.
Technical view
During Btrfs snapshot creation, pending_snapshot->anon_dev may be freed inside btrfs_get_new_fs_root() and later freed again on the create_snapshot() failure path if transaction commit errors. syzbot observed an ida_free warning for an unallocated ID. The listed fix commits update stable kernel code paths.
Likely exposure
Exposure is limited to Linux systems using Btrfs snapshot creation paths. The source bundle does not provide complete vulnerable-version ranges; it lists Linux kernel references, specific commits, and stable versions 5.10.210, 5.15.149, 6.1.79, 6.6.18, and 6.7.6 with default status shown as unaffected.
Exploitation context
No active exploitation is supported by the provided sources, and the CVE is not marked CISA KEV. The report is based on kernel analysis and a syzbot-triggered warning. The record does not describe weaponized exploitation, remote reachability, privilege requirements, or confirmed impact beyond the double-free condition.
Researcher notes
The record describes a race-like ownership failure around anonymous device IDs during Btrfs snapshot error handling. Evidence is strongest for the bug mechanism and fix references; it is weak for exploitability, impact severity, and exact vulnerable-version boundaries in downstream kernels.
Mitigation direction
- Check vendor kernel advisories for CVE-2024-26792 applicability to deployed kernel builds.
- Prioritize kernels using Btrfs snapshots or snapshot automation.
- Update to vendor kernels containing the referenced stable fixes when applicable.
- Avoid assuming version safety from upstream-only data; confirm with distribution backports.
Validation and detection
- Inventory Linux hosts and identify those using Btrfs filesystems or snapshot workflows.
- Map each kernel package to vendor advisories for CVE-2024-26792.
- Confirm whether the referenced stable commits are present or backported.
- Review kernel logs for Btrfs snapshot errors or ida_free warnings.
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-2024-26792 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/c34adc20b91a8e55e048b18d63f4f4ae003ecf8fCVE reference, Linux
- https://git.kernel.org/stable/c/eb3441093aad251418921246fc3b224fd1575701CVE reference, Linux
- https://git.kernel.org/stable/c/c8ab7521665bd0f8bc4a900244d1d5a7095cc3b9CVE reference, Linux
- https://git.kernel.org/stable/c/e2b54eaf28df0c978626c9736b94f003b523b451CVE 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.