Security readout for executives and security teams
Plain-English summary
This is a Linux kernel race condition in rxrpc connection handling. A local user could potentially trigger an availability impact, meaning a crash or service disruption, under high-complexity conditions. The sources do not show data theft, privilege escalation, or confirmed real-world exploitation.
Executive priority
Treat as a routine kernel maintenance issue unless you operate multi-user Linux systems with untrusted local access. It has availability impact but no source-backed evidence of active exploitation or confidentiality compromise.
Technical view
CVE-2023-53345 is a CWE-362 data race in rxrpc_wait_to_be_connected(). The function checked call->error before confirming completion state, producing a KCSAN race between rxrpc_send_data and rxrpc_set_call_completion. CVSS is 4.7 with local attack vector, low privileges, high complexity, and availability-only impact.
Likely exposure
Exposure is likely limited to Linux systems running affected kernels where rxrpc/AF_RXRPC code is present and reachable by local users. Internet-facing exposure is not indicated by the CVSS vector or source bundle.
Exploitation context
The source bundle reports KCSAN-detected race evidence and marks KEV as false. No cited source confirms active exploitation, public exploit use, or weaponized details. Practical exploitation appears constrained by local access and high complexity.
Researcher notes
The useful evidence is the race report and fix rationale: defer call->error access until completion state is reached. Analysis should focus on affected kernel lineage and vendor backports. Do not claim exploitability beyond the provided local, high-complexity availability rating.
Mitigation direction
- Apply Linux kernel updates containing the referenced stable fixes.
- Check distribution vendor advisories for backported fixed kernel packages.
- Prioritize systems allowing untrusted local users or workloads.
- Avoid relying on version strings alone; confirm vendor backport status.
Validation and detection
- Inventory Linux kernel versions across servers, containers hosts, and appliances.
- Check whether vendor kernels include the referenced stable commits or equivalent backports.
- Review local-user multi-tenant systems for higher operational priority.
- Monitor kernel logs for rxrpc-related crashes or warnings.
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-362: 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-2023-53345 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
- Medium
- CVSS
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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:H/PR:L/UI:N/S:U/C:N/I:N/A:H13.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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/3e8ba61a3fe4475a9b5c9fbfc664435c6795d872CVE reference, Linux
- https://git.kernel.org/stable/c/454e48a9ff04c5fa1631bb172070fcb6389b97f9CVE reference, Linux
- https://git.kernel.org/stable/c/2b5fdc0f5caa505afe34d608e2eefadadf2ee67aCVE 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.
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.