Security readout for executives and security teams
Plain-English summary
CVE-2024-26643 is a Linux kernel netfilter/nf_tables race condition involving anonymous sets with timeouts. The public bundle does not provide CVSS, CWE, confirmed impact, or active exploitation evidence. Treat it as a kernel maintenance risk: prioritize systems on affected kernel lines and embedded products that depend on vendor kernel updates.
Executive priority
Prioritize normal-to-accelerated patch management for internet-facing, multi-tenant, appliance, and high-value Linux systems. Escalate only if a vendor advisory rates your specific product as severe or if exploitation evidence emerges.
Technical view
The issue is in nf_tables set teardown. Asynchronous rhashtable garbage collection can collect timed-out elements from anonymous sets while the commit path releases the set. The fix marks anonymous sets as dead during unbind and abort paths so async GC skips them. The bundle does not characterize resulting memory corruption, crash, or privilege impact.
Likely exposure
Exposure is Linux systems running kernel versions identified as affected in the CVE record, especially deployments using netfilter/nf_tables. Siemens also references the CVE for some products. The source bundle does not define required privileges, configuration prerequisites, or whether nftables must be actively used.
Exploitation context
The CVE record says KEV is false, and the provided sources do not claim active exploitation or public exploit availability. The issue was originally reported from a 6.1.x path involving pipapo sets with low timeouts, but the bundle says that path is not possible upstream after an earlier change.
Researcher notes
Key evidence is the upstream kernel fix description: async GC can race with anonymous set release, and the mitigation is the dead flag. Missing evidence includes CVSS, CWE, exploitability, required capabilities, and concrete impact. Avoid assuming privilege escalation or remote reachability from this bundle alone.
Mitigation direction
- Inventory Linux kernel versions across servers, appliances, containers hosts, and embedded products.
- Apply vendor-supported kernel updates containing the referenced stable fixes.
- For Debian LTS systems, review the Debian advisory and update through supported channels.
- For Siemens products, follow Siemens SSA-265688 product-specific guidance.
- If no vendor fix is available, request vendor guidance rather than applying ad hoc kernel patches.
Validation and detection
- Compare running kernel versions against the CVE affected and fixed version data.
- Check distribution advisories for backported fixes, not only upstream version numbers.
- Confirm whether systems use or expose nf_tables/netfilter functionality.
- Track vendor appliance advisories for bundled Linux kernel updates.
- Verify patch deployment through package inventory or kernel build metadata.
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-2024-26643 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/d75a589bb92af1abf3b779cfcd1977ca11b27033CVE reference, Linux
- https://git.kernel.org/stable/c/edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bfCVE reference, Linux
- https://git.kernel.org/stable/c/e2d45f467096e931044f0ab7634499879d851a5cCVE reference, Linux
- https://git.kernel.org/stable/c/291cca35818bd52a407bc37ab45a15816039e363CVE reference, Linux
- https://git.kernel.org/stable/c/406b0241d0eb598a0b330ab20ae325537d8d8163CVE reference, Linux
- https://git.kernel.org/stable/c/b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1CVE reference, Linux
- https://git.kernel.org/stable/c/5224afbc30c3ca9ba23e752f0f138729b2c48dd8CVE reference, Linux
- https://git.kernel.org/stable/c/552705a3650bbf46a22b1adedc1b04181490fc36CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlCVE reference, siemens-SADP
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.