Security readout for executives and security teams
Plain-English summary
CVE-2023-53331 is a Linux kernel flaw in pstore/ram crash logging. Bad initialization of an empty persistent RAM zone can leave an out-of-bounds start value, causing later kernel memory access failures. The CVSS score is high at 7.8, but the vector is local and requires low privileges.
Executive priority
Treat this as a high-priority Linux kernel maintenance item for systems using persistent RAM crash logging. It is not currently sourced as actively exploited, but local low-privilege kernel impact justifies timely patching and reboot coordination, especially for shared, embedded, or appliance-like Linux environments.
Technical view
The bug is in Linux pstore/ram persistent RAM initialization after commit 30696378f68a. Empty buffers were treated as valid based on buffer_size alone, without checking start. A nonzero out-of-range start could later trigger out-of-bounds writes or panics during persistent_ram_write paths. The fix checks empty prz start during initialization.
Likely exposure
Exposure is most likely on Linux systems running affected kernel lines and using pstore/ram or ramoops persistent crash logging. The source lists affected Linux versions including 5.0, 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.53, 6.4.16, 6.5.3, and 6.6. Distro backports may change status.
Exploitation context
The provided CVE data does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector is local, low complexity, low privilege, no user interaction, with high confidentiality, integrity, and availability impact. The bundle describes kernel panics from future writes, not a public exploit chain.
Researcher notes
The key condition is an empty persistent RAM zone with an unchecked nonzero start after the prior pstore/ram behavior change. Validate exposure through kernel lineage, pstore/ram or ramoops configuration, and whether the stable commit or distro backport is present. The bundle does not provide exploit details or a non-update mitigation.
Mitigation direction
- Inventory Linux kernels and identify systems using pstore/ram or ramoops.
- Apply vendor or Linux stable kernel updates containing the referenced fixes.
- Prioritize reboot planning for exposed servers and appliances after kernel updates.
- If no update exists, check vendor guidance for supported configuration mitigations.
- Track distro advisories because backported fixes may not match upstream version numbers.
Validation and detection
- Check running kernel versions against vendor advisories and the CVE record.
- Confirm whether pstore/ram or ramoops is configured on each system.
- Verify the deployed kernel includes one of the referenced stable fixes or vendor backport.
- Review crash logging configuration and kernel logs for pstore/ram initialization issues.
- Document exceptions where fixed packages are not yet available from the vendor.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 89312657337e
- Linux stable commit c807ccdd812d
- Linux stable commit e972231db29b
- Linux stable commit dc2f60de9a7d
- Linux stable commit fedecaeef888
- Linux stable commit e95d7a8a6edd
- Linux stable commit f77990358628
- Linux stable commit 25fb4e3402d4
- Linux stable commit fe8c3623ab06
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-787: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-53331 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/89312657337e6e03ad6e9ea1a462bd9c158c85c8CVE reference, Linux
- https://git.kernel.org/stable/c/c807ccdd812d18985860504b503899f3140a9549CVE reference, Linux
- https://git.kernel.org/stable/c/e972231db29b5d1dccc13bf9d5ba55b6979a69edCVE reference, Linux
- https://git.kernel.org/stable/c/dc2f60de9a7d3efd982440117dab5579898d808cCVE reference, Linux
- https://git.kernel.org/stable/c/fedecaeef88899d940b69368c996e8b3b0b8650dCVE reference, Linux
- https://git.kernel.org/stable/c/e95d7a8a6edd14f8fab44c777dd7281db91f6ae2CVE reference, Linux
- https://git.kernel.org/stable/c/f77990358628b01bdc03752126ff5f716ea37615CVE reference, Linux
- https://git.kernel.org/stable/c/25fb4e3402d46f425ec135ef6f09792a4c1b3003CVE reference, Linux
- https://git.kernel.org/stable/c/fe8c3623ab06603eb760444a032d426542212021CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.