Security readout for executives and security teams
Plain-English summary
CVE-2023-53261 is a Linux kernel memory leak in the Coresight ACPI handling path. A local low-privileged user could affect system availability by causing kernel memory to be consumed. The provided sources do not show data theft, integrity impact, remote exploitation, or active exploitation.
Executive priority
Schedule remediation through normal kernel maintenance unless the environment hosts untrusted local users or workloads. Escalate priority for shared compute, developer workstations, and multi-tenant Linux systems because availability impact can affect service reliability.
Technical view
The issue is CWE-401: the ACPI buffer pointer used while parsing Coresight platform data was not freed. The fix moves buffer lifetime management into acpi_coresight_parse_graph() and frees it before return. CVSS 3.1 is 5.5, local, low privileges, availability impact only.
Likely exposure
Exposure is limited to Linux systems running affected kernel versions with the relevant Coresight ACPI code path. The bundle lists Linux kernel versions including 5.3 through fixed stable references. Downstream distribution exposure depends on vendor backports and kernel packaging.
Exploitation context
The CVSS vector indicates local access with low privileges and no user interaction. The source bundle marks KEV as false and provides no public evidence of active exploitation. Treat this primarily as a local denial-of-service risk, not a remote compromise path.
Researcher notes
Evidence is limited to the CVE record and upstream stable commit references. No exploit narrative, affected distro matrix, or operational workaround is provided. Analysis should focus on kernel lineage, backport status, and whether Coresight ACPI parsing is reachable on target hardware.
Mitigation direction
- Check vendor kernel advisories for CVE-2023-53261 coverage.
- Update to a kernel containing the referenced stable fixes.
- Prioritize shared Linux hosts and systems running untrusted local workloads.
- Track downstream distribution backports, not only upstream version numbers.
Validation and detection
- Inventory Linux kernel versions across affected assets.
- Confirm whether kernels include stable commits d1b60e7c9fee or 1a9e02673e25.
- Review vendor advisories for backported package identifiers.
- Check kernel memory leak telemetry where available.
- Validate remediation in staging before broad kernel rollout.
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-401: 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-2023-53261 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/d1b60e7c9fee34eaedf1fc4e0471f75b33f83a4aCVE reference, Linux
- https://git.kernel.org/stable/c/1a9e02673e2550f5612099e64e8761f0c8fc0f50CVE 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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.