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CVE Record

CVE-2024-50251: netfilter: nft_payload: sanitize offset and length before calling skb_checksum()

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: sanitize offset and length before calling skb_checksum() If access to offset + length is larger than the skbuff length, then skb_checksum() triggers BUG_ON(). skb_checksum() internally subtracts the length parameter while iterating over skbuff, BUG_ON(len) at the end of it checks that the expected length to be included in the checksum calculation is fully consumed.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-50251 is a Linux kernel netfilter flaw where malformed payload checksum parameters can hit a kernel BUG condition. The practical business concern is service disruption, not confirmed data theft. The source bundle does not provide CVSS, CWE, or active exploitation evidence.

Executive priority

Treat as a timely kernel stability patching item. Prioritize internet-facing, multi-tenant, and operational technology systems, but do not classify as emergency exploitation based on the supplied evidence alone.

Technical view

In nft_payload, offset and length were not sanitized before skb_checksum(). When offset plus length exceeds the skbuff length, skb_checksum() can finish with unconsumed length and trigger BUG_ON(len). Kernel stable commits add bounds handling across maintained branches.

Likely exposure

Exposure is most likely on Linux systems running affected kernel branches before the referenced stable fixes, especially systems using netfilter/nftables. Debian LTS and Siemens advisories indicate downstream impact. The provided evidence does not prove all Linux deployments are exploitable.

Exploitation context

CISA KEV status is false in the bundle. A public GitHub PoC reference exists, so researcher interest is visible, but the supplied sources do not confirm active exploitation, remote reachability, or required privileges.

Researcher notes

The root issue is missing offset and length validation before skb_checksum() in nft_payload. Assess branch-specific fixes from kernel stable commits. Avoid assuming exploitability conditions; the bundle lacks privilege, namespace, and remote-trigger details.

Mitigation direction

  • Update Linux kernels to vendor releases containing the referenced stable fixes.
  • Apply relevant Debian LTS or device-vendor advisories for managed distributions and appliances.
  • Check Siemens advisories for affected industrial products before scheduling firmware changes.
  • If no vendor fix is available, follow vendor mitigation guidance and reduce nftables exposure where practical.

Validation and detection

  • Inventory Linux kernel versions across servers, containers hosts, and appliances.
  • Compare deployed kernels against vendor advisories and referenced fixed stable branches.
  • Identify systems using nftables or netfilter rules that process packet payload checksums.
  • Confirm patched kernels are booted, not only installed.
  • Track vendor advisories for products that embed Linux kernels.
Prepared
Confidence
medium
Sources
12

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-2024-50251 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
2ADP providers
15Source links

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
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040df, 7ec3f7b47b8d9ad7ba425726f2c58f9ddce040dfunaffected
LinuxLinux4.5, 0, 4.19.323, 5.4.285, 5.10.229, 5.15.171, 6.1.116, 6.6.60, 6.11.7, 6.12affected
Weakness

CWE details

No CWE listed

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