Security readout for executives and security teams
Plain-English summary
This Linux kernel issue can let a local, low-privileged user trigger a kernel NULL pointer crash in block I/O scheduling code. The main business risk is system availability, not data theft or integrity loss. The source bundle does not show active exploitation.
Executive priority
Patch through normal kernel maintenance, with higher priority for shared Linux hosts, bastion systems, and environments with untrusted local users. This is not evidenced as remotely exploitable or actively exploited in the provided sources.
Technical view
CVE-2023-53292 is a CWE-476 NULL dereference in blk-mq. During blk_mq_elv_switch_none, q->elevator may become NULL after q->sysfs_lock is acquired because of an elevator switch. The fix adds a NULL check with the lock. CVSS 3.1 is 5.5, local, low privilege, availability high.
Likely exposure
Exposure is limited to Linux systems running affected kernel builds identified by vendor or distribution mapping. The CVSS vector requires local access with low privileges and no user interaction. Internet-facing remote exploitation is not supported by the provided sources.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of active exploitation or public weaponization. Treat this primarily as a local denial-of-service risk until vendor or distribution advisories say otherwise.
Researcher notes
The affected-version evidence in the bundle is limited and should be validated against distribution kernel backports. The vulnerability is specifically tied to q->elevator becoming NULL during an elevator switch, and the upstream remedy is a guarded check under lock.
Mitigation direction
- Update Linux kernels to vendor releases containing the referenced stable fixes.
- Check distribution advisories for exact package versions mapped to CVE-2023-53292.
- Prioritize multi-user systems and systems where untrusted users can obtain local accounts.
- Reduce unnecessary local account access until patched.
- Follow vendor kernel guidance if package status differs from upstream references.
Validation and detection
- Inventory Linux kernel versions across affected servers and workloads.
- Map installed distro kernel packages to vendor CVE-2023-53292 advisories.
- Confirm patched kernels include one of the referenced stable commits or downstream equivalent.
- Review recent kernel crash or availability incidents without assuming compromise.
- Track exceptions where reboot or kernel replacement is delayed.
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.
CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-53292 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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/988ddb77218d3975dd13dee7bb0e1fae098a9fdbCVE reference, Linux
- https://git.kernel.org/stable/c/3e977386521b71471e66ec2ba82efdfcc456adf2CVE reference, Linux
- https://git.kernel.org/stable/c/245165658e1c9f95c0fecfe02b9b1ebd30a1198aCVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.