Security readout for executives and security teams
Plain-English summary
A Linux Btrfs flaw can crash the kernel during filesystem relocation or balancing when a RAID stripe tree is involved. The faulty readahead path may submit invalid storage reads after a missing mapping. This can interrupt affected storage services or hosts, but the supplied evidence does not establish remote exploitation or observed attacks.
Executive priority
Prioritize remediation for storage servers or appliances using the specified Btrfs configuration, especially where host crashes affect critical services. General Linux fleets without Btrfs RAID stripe trees have substantially lower apparent exposure. Require vendor-confirmed version mapping because the supplied affected-version data is unclear.
Technical view
During Btrfs relocation, readahead of the relocation inode can receive ENOENT when preallocated extents lack RAID stripe tree mappings. The error was not handled, allowing invalid reads to reach block scatter-gather processing and trigger a kernel assertion. The supplied CVSS 3.1 score is 7.0, with local access, high complexity, and low privileges.
Likely exposure
Exposure is limited to Linux systems using Btrfs with a RAID stripe tree and performing relocation or balance operations. The supplied version metadata names 6.7, 6.11.3, and 6.12 but is ambiguous about precise ranges; confirm affected and fixed builds with the distribution or kernel vendor.
Exploitation context
The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation. The CVSS vector describes a local, high-complexity condition requiring low privileges and no user interaction. The demonstrated outcome is a kernel crash during a specialized Btrfs storage operation.
Researcher notes
The source demonstrates an unhandled ENOENT leading to invalid readahead I/O and a BUG in scatter-gather request mapping. It does not demonstrate controlled memory corruption, data disclosure, persistence, or remote reachability. Treat broader confidentiality and integrity impact implied by the CVSS vector cautiously until corroborated by additional technical evidence.
Mitigation direction
- Apply a vendor-supported kernel containing the appropriate referenced stable fix or confirmed backport.
- Ask the Linux distribution vendor to clarify affected package versions and remediation status.
- Inventory Btrfs systems using RAID stripe trees and prioritize hosts performing balance or relocation.
- Until updated, avoid nonessential balance or relocation operations on potentially affected filesystems.
Validation and detection
- Record each system's kernel package version and compare it with vendor advisories or backport notes.
- Verify whether Btrfs and RAID stripe trees are configured on each potentially exposed host.
- Confirm the installed kernel contains the applicable referenced stable commit or an equivalent vendor backport.
- Review kernel logs for RAID-stripe lookup failures, scatter-gather assertions, or crashes during Btrfs balance.
- After updating, validate normal filesystem operations using approved, non-destructive operational tests.
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-2024-49932 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
- High
- CVSS
- 7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/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:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/PR:L/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/f7a1218a983ab98aba140dc20b25f60b39ee4033CVE reference, Linux
- https://git.kernel.org/stable/c/04915240e2c3a018e4c7f23418478d27226c8957CVE 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.