Security readout for executives and security teams
Plain-English summary
CVE-2022-48913 is a Linux kernel blktrace use-after-free. It can leave stale debugfs files after block tracing is removed, causing the kernel to access freed memory. Public sources do not provide CVSS, CWE, or evidence of active exploitation.
Executive priority
Treat as a medium-priority kernel maintenance item. Patch through normal emergency-capable Linux update processes, faster for shared systems or environments where local users may access tracing interfaces. There is no sourced evidence of active exploitation.
Technical view
When tracing a whole disk, blktrace creates 'dropped' and 'msg' under q->debugfs_dir while bt->dir is NULL. blk_trace_free() fails to remove them, and later reads can dereference freed struct blk_trace memory. The kernel report shows KASAN detecting use-after-free in blk_dropped_read.
Likely exposure
Exposure is likely limited to Linux systems running affected kernel versions with blktrace/debugfs functionality present. The source bundle lists Linux kernel 5.12 and related stable ranges, with fixes referenced for stable branches. Required privileges and distribution-specific impact are not stated in the provided sources.
Exploitation context
No cited source says this is actively exploited, and it is not listed as KEV in the bundle. The evidence is a kernel memory-safety bug triggered through blktrace-related operations, with demonstrated KASAN detection. Public sources do not establish remote exploitability or weaponized exploitation.
Researcher notes
The CVE record lacks CVSS and CWE data. The source bundle provides kernel commit references and a KASAN trace but not privilege requirements, exploitability analysis, or distribution mappings. Validate exposure through kernel lineage and vendor backports rather than upstream version numbers alone.
Mitigation direction
- Update to a vendor kernel that includes the referenced stable blktrace fixes.
- Review Linux distribution advisories for package-specific fixed versions.
- Restrict unnecessary access to block tracing and debugfs where operationally feasible.
- Prioritize remediation on shared or multi-user Linux systems.
Validation and detection
- Inventory Linux kernel versions across affected assets.
- Confirm whether vendor kernels include the referenced stable commits.
- Check whether blktrace/debugfs is enabled or used on production systems.
- Monitor vendor advisories for backported fixes and updated affected-version guidance.
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-2022-48913 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/78acc7dbd84a8c173a08584750845c31611160f2CVE reference, Linux
- https://git.kernel.org/stable/c/6418634238ade86f2b08192928787f39d8afb58cCVE reference, Linux
- https://git.kernel.org/stable/c/30939293262eb433c960c4532a0d59c4073b2b84CVE 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.