CVE-2024-44945: netfilter: nfnetlink: Initialise extack before use in ACKs
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nfnetlink: Initialise extack before use in ACKs
Add missing extack initialisation when ACKing BATCH_BEGIN and BATCH_END.
Security readout for executives and security teams
Plain-English summary
CVE-2024-44945 is a Linux kernel defect in netfilter's nfnetlink acknowledgement handling. The public record says an extended acknowledgement structure was used without initialization for batch begin/end ACKs. Business urgency is currently hard to quantify because no CVSS score, CWE, or active exploitation evidence is provided.
Executive priority
Handle as a kernel maintenance item with uncertain severity. Do not treat it as confirmed emergency exploitation from the supplied sources, but include it in near-term Linux patch governance because kernel defects can have broad operational reach.
Technical view
The issue is in Linux kernel netfilter nfnetlink. Upstream resolved it by initializing extack before ACKing BATCH_BEGIN and BATCH_END. The supplied data identifies Linux kernel versions including 6.10, 6.10.7, and 6.11, but distribution-level package exposure requires vendor mapping to the referenced stable commits.
Likely exposure
Exposure is most likely on systems running affected Linux kernel builds with netfilter/nfnetlink code present. The source data is kernel-version oriented, so vulnerability managers should confirm their distribution kernel packages and backported fixes rather than relying only on upstream version numbers.
Exploitation context
The source bundle does not include proof of exploitation, public exploit claims, KEV listing, CVSS scoring, or a detailed impact statement. Treat active exploitation as unconfirmed from the provided evidence.
Researcher notes
Evidence is limited to the CVE record and upstream stable commit references. The technical change is initialization of extack in nfnetlink ACK handling for batch boundaries. No exploitability details, attacker prerequisites, impact class, or vendor-specific remediation matrix are present in the provided bundle.
Mitigation direction
Check Linux distribution advisories for CVE-2024-44945 package status.
Update kernels to vendor releases containing the referenced stable fixes.
Reboot systems after kernel updates to activate the fixed kernel.
Prioritize shared, exposed, and security-sensitive Linux hosts first.
Validation and detection
Inventory running kernel versions across Linux assets.
Map distribution kernel packages to vendor CVE-2024-44945 guidance.
Verify changelogs or source include the referenced upstream fixes.
Confirm hosts rebooted into the remediated kernel.
Track scanner results after vendor content updates.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
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
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CVE-2024-44945 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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.