Security readout for executives and security teams
This is a Linux kernel flaw in nftables that can let a local, low-privileged user gain root-level control. It is not a remote internet-facing bug by itself, but shared servers, developer hosts, and container-heavy environments may be more exposed if untrusted users can obtain relevant namespace capabilities. Exposure is most relevant on Linux systems running affected kernels with local users, containers, or workloads that can obtain CAP_NET_ADMIN in a namespace. The bundle names Linux Kernel v5.9-rc1 and downstream Debian, Fedora, live patch, and NetApp advisories, but does not provide a complete affected-version matrix. High priority for Linux infrastructure with shared access or container workloads. It is a local bug, so internet exposure is indirect, but successful exploitation could mean full host compromise. Patch through normal emergency kernel maintenance where affected systems are confirmed. Mitigation focus: Apply kernel updates from your Linux distribution or appliance vendor.; Review Debian, Fedora, NetApp, or live patch advisories for your platform.; Prioritize hosts with untrusted users, CI runners, and container workloads..
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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-31248 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://lore.kernel.org/netfilter-devel/20230705121627.GC19489@breakpoint.cc/T/CVE reference · issue-tracking
- https://www.openwall.com/lists/oss-security/2023/07/05/2CVE reference · mailing-list
- https://www.debian.org/security/2023/dsa-5453CVE reference
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPHI46ROSSLVAV4R5LJWJYU747JGOS6D/CVE reference
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGZC5XOANA75OJ4XARBBXYSLDKUIJI5E/CVE reference
- https://lists.debian.org/debian-lts-announce/2023/08/msg00001.htmlCVE reference
- https://security.netapp.com/advisory/ntap-20240201-0001/CVE 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.