Security readout for executives and security teams
Plain-English summary
CVE-2024-26809 is a Linux kernel netfilter issue in nftables pipapo set handling. The kernel could attempt to destroy the same set elements twice, creating a kernel memory-safety risk. The sources do not provide CVSS, CWE, or confirmed exploit activity.
Executive priority
Treat this as a kernel patch-management item with uncertain severity. It is not KEV-listed in the bundle, but kernel memory-safety bugs can have high operational impact, so include it in the next normal or accelerated Linux update cycle based on asset criticality.
Technical view
The fix changes nft_set_pipapo clone element release behavior so elements are released only from the destroy path. The CVE notes this depends on earlier nf_tables pipapo commit-protocol integration. Multiple Linux stable commits and a Debian LTS advisory are referenced.
Likely exposure
Systems running affected Linux kernels with nf_tables/netfilter functionality may be exposed. Practical exposure depends on kernel version, distribution backports, and whether vulnerable code is reachable in the deployed configuration.
Exploitation context
The source bundle does not cite active exploitation, and KEV is false. It also does not provide public exploit details, required privileges, or attack preconditions, so exploitability should be treated as unresolved from these sources.
Researcher notes
Evidence supports a double-destroy condition in nft_set_pipapo clone handling, fixed through Linux stable commits. The bundle lacks CVSS, CWE, exploitability details, and privilege requirements. Validate against downstream backports rather than relying only on upstream version numbers.
Mitigation direction
- Apply Linux kernel updates from your distribution or kernel vendor.
- Prioritize updates that include the referenced stable netfilter fixes.
- Review Debian LTS guidance if running Debian LTS kernels.
- Track vendor advisories for exact package versions and backports.
- Avoid inventing compensating controls without vendor confirmation.
Validation and detection
- Inventory running kernel versions across Linux systems.
- Check vendor advisories for whether each kernel build includes the fix.
- Confirm nftables/netfilter usage on exposed hosts.
- Verify rebooted systems are running the updated kernel.
- Document unresolved systems for risk acceptance or remediation tracking.
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.
CVE-2024-26809 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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/b36b83297ff4910dfc8705402c8abffd4bbf8144CVE reference, Linux
- https://git.kernel.org/stable/c/362508506bf545e9ce18c72a2c48dcbfb891ab9cCVE reference, Linux
- https://git.kernel.org/stable/c/5ad233dc731ab64cdc47b84a5c1f78fff6c024afCVE reference, Linux
- https://git.kernel.org/stable/c/ff90050771412b91e928093ccd8736ae680063c2CVE reference, Linux
- https://git.kernel.org/stable/c/821e28d5b506e6a73ccc367ff792bd894050d48bCVE reference, Linux
- https://git.kernel.org/stable/c/9384b4d85c46ce839f51af01374062ce6318b2f2CVE reference, Linux
- https://git.kernel.org/stable/c/b0e256f3dd2ba6532f37c5c22e07cb07a36031eeCVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
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.