Security readout for executives and security teams
Plain-English summary
CVE-2023-3108 is a Linux kernel flaw that can let a local user crash a system. The business impact is availability, not data theft or privilege escalation based on the supplied sources. Red Hat rates it medium, and the provided data does not show active exploitation.
Executive priority
Treat this as a moderate availability risk. It deserves kernel exposure review and routine patch planning, especially for multi-user systems, but the supplied evidence does not justify emergency response for remote compromise.
Technical view
The flaw is a race condition in the Linux kernel symmetric key cipher interface, specifically skcipher_recvmsg in crypto/algif_skcipher.c around get_user_pages_fast handling. The CVSS vector is local, low complexity, no privileges, no user interaction, with high availability impact only.
Likely exposure
Exposure appears limited to systems where a local user can reach the affected Linux kernel crypto interface. In the supplied Red Hat data, RHEL 7 kernel and kernel-rt status is unknown; RHEL 6, 8, and 9 entries are listed unaffected.
Exploitation context
The sources describe a local denial-of-service crash. KEV is false, and no supplied source states active exploitation. The record does not support remote exploitation, confidentiality impact, integrity impact, or privilege escalation claims.
Researcher notes
Focus analysis on AF_ALG skcipher recvmsg behavior, get_user_pages_fast interaction, race timing, and crash-only impact. Avoid assuming broader kernel versions or exploitability beyond the supplied Red Hat and upstream references.
Mitigation direction
- Check vendor advisories for your distribution and kernel package status.
- Apply vendor kernel updates or backports when applicable.
- Track the upstream Linux commit and Red Hat Bugzilla for remediation guidance.
- Reduce untrusted local user access on sensitive Linux hosts.
- Plan reboot windows if kernel packages require restart.
Validation and detection
- Inventory Linux hosts and record running kernel versions.
- Identify systems using RHEL 7 kernel or kernel-rt packages.
- Confirm vendor status for each distribution and package build.
- Review system crash logs for unexplained local denial-of-service events.
- Document unaffected RHEL 6, 8, and 9 findings from supplied Red Hat data.
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
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ATT&CK lookup starting points
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CWE-362: Exact CWE lookup
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Open ATT&CK lookupCWE-400: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-3108 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
- 6.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/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.
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:N/UI:N/S:U/C:N/I:N/A:H2.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2023-3108CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2221472CVE reference · issue-tracking, x_refsource_REDHAT
- https://github.com/torvalds/linux/commit/9399f0c51489ae8c16d6559b82a452fdc1895e91CVE 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.
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.