Security readout for executives and security teams
Plain-English summary
This is a Linux kernel memory-safety flaw in io_uring read handling. A local user or workload could potentially trigger a use-after-free, risking privilege impact on the affected host. It is not remotely exploitable based on the CVSS vector provided.
Executive priority
Treat this as a high-priority kernel patching issue for shared Linux infrastructure. It is less urgent than an internet-facing remote exploit, but local privilege-impact kernel bugs can materially worsen breaches once attackers obtain footholds.
Technical view
IORING_OP_READ mishandled provided buffer-list consumption when read I/O returned some negative errors, excluding -EAGAIN and -EIOCBQUEUED. Completion in a separate context could then lead to use-after-free. The CVE maps this to CWE-416 with CVSS 7.8, local, low-complexity, low-privilege impact.
Likely exposure
Systems running affected Linux kernel versions are in scope, especially multi-user hosts, container platforms, developer machines, and shared workloads where local code execution is possible. Exact exposure depends on distribution kernel backports and whether the referenced stable fixes are present.
Exploitation context
The provided bundle does not show active exploitation, and KEV is false. The risk is local post-access escalation or host compromise, not initial remote entry. Public sources provided identify kernel fixes and a Debian LTS advisory, but no exploit status.
Researcher notes
Focus validation on io_uring-capable kernels and downstream backports. The core condition is incorrect provided-buffer handling on certain negative read returns, followed by completion in another context. Sources do not provide a proof of concept or exploitation telemetry.
Mitigation direction
- Update affected Linux kernels through the relevant vendor or distribution channel.
- Confirm the update includes the referenced upstream stable fixes.
- Prioritize shared systems where untrusted local users or workloads can run code.
- Follow Debian LTS guidance where Debian kernels are deployed.
- If patching is delayed, check vendor guidance for supported compensating controls.
Validation and detection
- Inventory Linux kernel versions across servers, endpoints, and container hosts.
- Map each kernel to distribution advisories and backported fix status.
- Verify whether the referenced stable commits are included in deployed kernels.
- Run authenticated vulnerability checks after kernel updates and reboot.
- Document exceptions where vendor fix status is unclear.
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-2023-52926 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
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/72060434a14caea20925e492310d6e680e3f9007CVE reference
- https://git.kernel.org/stable/c/6c27fc6a783c8a77c756dd5461b15e465020d075CVE reference
- https://git.kernel.org/stable/c/a08d195b586a217d76b42062f88f375a3eedda4dCVE reference
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlCVE reference
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.