Security readout for executives and security teams
Plain-English summary
This Linux kernel issue affects CPU scheduling. A local, low-privileged user context is the rated attack position, but the supplied description mainly shows an internal scheduler warning involving migration-disabled tasks. Treat it as high priority for shared Linux hosts until your vendor confirms fixed kernel builds.
Executive priority
Schedule remediation in the next normal high-severity kernel patch window, faster for shared or multi-tenant Linux infrastructure. There is no cited active exploitation, but the CVSS impact and kernel-level scope justify prompt tracking.
Technical view
The fair scheduler load balancer can select a migration-disabled task's current CPU as a new destination when CPU groups overlap. That path triggers a warning in set_task_cpu(). The fix changes the destination CPU mask to exclude CPUs from the busiest group. CVSS is 7.8 local/low-complexity/low-privilege with high C/I/A impact.
Likely exposure
Linux systems running affected kernel versions or downstream builds without the referenced stable scheduler fix may be exposed. Exact exposure depends on distribution backports, because distro kernel version strings may not map directly to upstream versions.
Exploitation context
The source bundle does not show active exploitation, and KEV is false. CVSS indicates local attack vector, low complexity, low privileges, and no user interaction. The public description does not provide practical exploit details or confirm real-world abuse.
Researcher notes
The evidence centers on an upstream scheduler bug and stable commits. The supplied text does not establish a complete exploit chain, affected distro packages, or observable compromise indicators. Validate by vendor backport status and presence of the referenced fix.
Mitigation direction
- Apply vendor kernel updates containing the referenced scheduler fix.
- Check distribution advisories for backported fixes before relying on version numbers alone.
- Prioritize shared servers, multi-user systems, and container hosts for patch scheduling.
- Follow vendor guidance if immediate patching is not possible.
Validation and detection
- Inventory Linux kernel versions across servers, workstations, and images.
- Compare kernels against vendor advisories for CVE-2023-53215.
- Confirm the scheduler fix is present in deployed kernel changelogs or source packages.
- Monitor kernel logs for related scheduler warnings while patching progresses.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 32d937f94b7805d4c9028b8727a7d6241547da54
- Linux stable commit a5286f4655ce2fa28f477c0b957ea7f323fe2fab
- Linux stable commit cec1857b1ea5cc3ea2b600564f1c95d1a6f27ad1
- Linux stable commit 6b0c79aa33075b34c3cdcea4132c0afb3fc42d68
- Linux stable commit 3cb43222bab8ab328fc91ed30899b3df2efbccfd
- Linux stable commit 78a5f711efceb37e32c48cd6b40addb671fea9cc
- Linux stable commit 34eb902050d473bb2befa15714fb1d30a0991c15
- Linux stable commit 0dd37d6dd33a9c23351e6115ae8cdac7863bc7de
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-2023-53215 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/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:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/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/32d937f94b7805d4c9028b8727a7d6241547da54CVE reference, Linux
- https://git.kernel.org/stable/c/a5286f4655ce2fa28f477c0b957ea7f323fe2fabCVE reference, Linux
- https://git.kernel.org/stable/c/cec1857b1ea5cc3ea2b600564f1c95d1a6f27ad1CVE reference, Linux
- https://git.kernel.org/stable/c/6b0c79aa33075b34c3cdcea4132c0afb3fc42d68CVE reference, Linux
- https://git.kernel.org/stable/c/3cb43222bab8ab328fc91ed30899b3df2efbccfdCVE reference, Linux
- https://git.kernel.org/stable/c/78a5f711efceb37e32c48cd6b40addb671fea9ccCVE reference, Linux
- https://git.kernel.org/stable/c/34eb902050d473bb2befa15714fb1d30a0991c15CVE reference, Linux
- https://git.kernel.org/stable/c/0dd37d6dd33a9c23351e6115ae8cdac7863bc7deCVE 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.