Security readout for executives and security teams
Plain-English summary
A Linux kernel power-management bug can leave resources allocated when a devfreq device is released. This can waste kernel memory, but the cited material does not quantify the operational impact or demonstrate system compromise. The supplied CVSS score is 7.8.
Executive priority
Prioritize remediation on shared or multi-user Linux systems, while avoiding an emergency internet-edge response unsupported by the evidence. The score is high, but exploitation requires local access and the cited sources do not demonstrate active exploitation or explain the claimed severe security impacts.
Technical view
devfreq_dev_release() omitted srcu_cleanup_notifier_head() after srcu_init_notifier_head() allocated resources, producing a leak detected by kmemleak. The record references fixes across multiple stable kernel branches. It does not explain how the leak produces the high confidentiality, integrity, and availability impacts asserted by the CVSS vector.
Likely exposure
Potential exposure exists on Linux systems running versions identified as affected and exercising the devfreq device-release path. The record includes releases from 4.7 through 6.6, repeated commit identifiers, and an anomalous “0.” Confirm distribution backports and packaged-kernel status instead of relying only on version comparisons.
Exploitation context
The supplied CVSS vector describes a local, low-complexity issue requiring low privileges and no user interaction. The bundle marks it absent from KEV and cites no active exploitation, public exploit, or demonstrated attack chain. Do not treat the resource leak alone as proof of code execution or privilege escalation.
Researcher notes
The direct evidence establishes an SRCU notifier cleanup omission reported by kmemleak. It does not establish exploitability, trigger frequency, resource-growth bounds, or a path to confidentiality or integrity loss. Branch-specific fix references are available, but downstream distribution backports require separate confirmation.
Mitigation direction
- Apply the distribution kernel update containing the applicable referenced stable fix, then reboot into the updated kernel.
- Verify vendor backport status because packaged kernel version numbers may not directly match upstream releases.
- If updating is delayed, consult distribution guidance; the supplied sources name no validated workaround.
Validation and detection
- Inventory running kernel versions and compare them with the record’s affected releases.
- Map packaged kernels to distribution advisories or backports for the referenced stable fixes.
- Confirm the updated kernel is active after reboot and affected kernels are not boot defaults.
- Where feasible, retest devfreq device teardown for recurring kernel memory-leak findings.
Public sources used
- CVE Program record for CVE-2023-53518
- CVE List V5 record
- Linux stable fix 7462483446cb
- Linux stable fix 64e6e0dc2d57
- Linux stable fix 29811f4b8255
- Linux stable fix ab192e5e5d3b
- Linux stable fix 111bafa210ae
- Linux stable fix 8918025feb2f
- Linux stable fix 1640e9c72173
- Linux stable fix 3354c401c68d
- Linux stable fix 5693d077595d
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
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ATT&CK lookup starting points
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CVE-2023-53518 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.
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:H1.85.9LinuxVulnerability 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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/7462483446cb9986568ad7adae746ce5f18d2968CVE reference, Linux
- https://git.kernel.org/stable/c/64e6e0dc2d578c0a9e31cb4edd719f0a3ed98f6dCVE reference, Linux
- https://git.kernel.org/stable/c/29811f4b8255d4238cf326f3bb7129784766beabCVE reference, Linux
- https://git.kernel.org/stable/c/ab192e5e5d3b48415909a8408acfd007a607bcc0CVE reference, Linux
- https://git.kernel.org/stable/c/111bafa210ae546bee7644be730c42df9c35b66eCVE reference, Linux
- https://git.kernel.org/stable/c/8918025feb2f5f7c73f2495c158f22997e25cb02CVE reference, Linux
- https://git.kernel.org/stable/c/1640e9c72173911ad0fddb05012c01eafe082c4eCVE reference, Linux
- https://git.kernel.org/stable/c/3354c401c68d70567d1ef25d12f4e22a7813a3c6CVE reference, Linux
- https://git.kernel.org/stable/c/5693d077595de721f9ddbf9d37f40e5409707dfeCVE 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.