Security readout for executives and security teams
Plain-English summary
CVE-2023-26605 is a Linux kernel memory-safety flaw in version 6.0.8. It requires local access, but the recorded impact is high across confidentiality, integrity, and availability. For executives, the concern is privilege-bearing local compromise or service disruption on systems where untrusted users, workloads, or tenants can run code.
Executive priority
Prioritize as high where local users or workloads are not fully trusted. This is not presented as a remote unauthenticated internet issue, but kernel-level impact can be severe if exploited. Patch critical shared Linux environments first, then complete normal fleet remediation.
Technical view
The CVE describes a use-after-free in `inode_cgwb_move_to_attached` in `fs/fs-writeback.c`, related to `__list_del_entry_valid`. CVSS 3.1 rates it 7.8 with local attack vector, low complexity, low privileges, no user interaction, and high C/I/A impact. The source bundle points to an upstream Linux commit and LKML discussion.
Likely exposure
Exposure is most likely on systems running Linux kernel 6.0.8 or downstream kernels containing the vulnerable writeback code. The bundle does not provide CPEs, a full vendor matrix, or distribution-specific affected package versions, so organizations should validate through their OS and appliance vendors.
Exploitation context
The CVSS vector indicates local exploitation with low privileges and no user interaction. The CVE is not listed as KEV in the bundle, and no cited source in the bundle states active exploitation. Treat exploitation status as unconfirmed rather than active.
Researcher notes
Public evidence is limited. The bundle identifies CWE-416, Linux kernel 6.0.8, the affected function and file, LKML discussion, NetApp advisory, and an upstream kernel commit. It does not provide exploit details, confirmed exploitation, complete affected CPEs, or distribution package mappings.
Mitigation direction
- Apply kernel updates from your Linux distribution or vendor.
- Verify the update includes the upstream fix or equivalent backport.
- Prioritize multi-user, shared-hosting, and container-dense Linux systems.
- Restrict untrusted local access until affected systems are patched.
- Review NetApp advisory guidance if NetApp products are in scope.
Validation and detection
- Inventory Linux kernel versions across servers and appliances.
- Identify hosts running kernel 6.0.8 or vendor builds based on it.
- Compare installed packages against distribution security advisories.
- Check whether vendor patches reference the upstream commit ID.
- Review systems that permit shell, container, or workload execution by untrusted users.
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-416: 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-2023-26605 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:H1.85.9Primary CVE scoreVulnerability 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
Source materials
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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.