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CVE Record

CVE-2024-35962: netfilter: complete validation of user input

In the Linux kernel, the following vulnerability has been resolved: netfilter: complete validation of user input In my recent commit, I missed that do_replace() handlers use copy_from_sockptr() (which I fixed), followed by unsafe copy_from_sockptr_offset() calls. In all functions, we can perform the @optlen validation before even calling xt_alloc_table_info() with the following check: if ((u64)optlen < (u64)tmp.size + sizeof(tmp)) return -EINVAL;

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-35962 is a Linux kernel netfilter input-validation flaw. The fix adds a missing length check before kernel netfilter table replacement logic processes user-supplied data. The public bundle does not provide CVSS, CWE, impact class, or proof of active exploitation.

Executive priority

Treat as a kernel hygiene item requiring timely patch validation, not an emergency based on the provided evidence. Raise priority for shared Linux hosts, security appliances, and systems where untrusted users or workloads can interact with networking controls.

Technical view

The vulnerability is in Linux kernel netfilter do_replace() handling. A previous fix addressed copy_from_sockptr(), but unsafe copy_from_sockptr_offset() paths still lacked complete optlen validation. Stable kernel patches add an early check that optlen is at least tmp.size plus the header size before allocating table information.

Likely exposure

Exposure is most plausible on Linux systems running affected kernel builds with netfilter functionality available. The bundle lists Linux kernel stable fixes and downstream Debian LTS and Siemens advisories, but does not provide complete distribution-specific affected-version mapping.

Exploitation context

The source bundle does not show CISA KEV listing, public exploitation, exploit code, or weaponized activity. Treat exploitation status as unconfirmed from the provided evidence.

Researcher notes

The key issue is incomplete optlen validation before copy_from_sockptr_offset() in netfilter table replacement paths. The record lacks CVSS and explicit impact details, so severity and exploitability should be derived from upstream commits and vendor advisories rather than assumed.

Mitigation direction

  • Review Linux kernel, distribution, and appliance vendor advisories for CVE-2024-35962.
  • Update to a vendor kernel containing the referenced netfilter validation fixes.
  • Prioritize internet-facing, multi-tenant, container-hosting, and appliance systems using netfilter.
  • Track Debian LTS and Siemens guidance where those products are in scope.

Validation and detection

  • Inventory Linux kernel versions and vendor kernel package build identifiers.
  • Compare deployed kernels against the referenced stable fixes and vendor advisories.
  • Check whether netfilter or iptables compatibility functionality is enabled or exposed.
  • Confirm patched kernels are booted, not only installed.
Prepared
Confidence
medium
Sources
11

Public sources used

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-2024-35962 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
3ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux0f038242b77ddfc505bf4163d4904c1abd2e74d6, 440e948cf0eff32cfe322dcbca3f2525354b159b, 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5, 81d51b9b7c95e791ba3c1a2dd77920a9d3b3f525, 58f2bfb789e6bd3bc24a2c9c1580f3c67aec3018, 0c83842df40f86e529db6842231154772c20edccunaffected
LinuxLinux5.10.215, 5.15.154, 6.1.85, 6.6.26, 6.8.5unaffected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.