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CVE Record

CVE-2024-42281: bpf: Fix a segment issue when downgrading gso_size

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a segment issue when downgrading gso_size Linearize the skb when downgrading gso_size because it may trigger a BUG_ON() later when the skb is segmented as described in [1,2].

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel networking/BPF flaw where changing packet segmentation size can leave packet buffers in a state that later hits a kernel BUG condition. The source bundle does not provide CVSS, confirmed exploitation, or business impact detail. Treat it primarily as a possible availability risk until vendor guidance clarifies severity for your distributions and devices.

Executive priority

Do not treat this as confirmed emergency exploitation based on the supplied evidence. Assign a vendor-tracking patch priority, with faster action for exposed Linux network infrastructure and regulated operational technology environments that depend on affected vendor kernels.

Technical view

The kernel fix linearizes the skb when BPF downgrades gso_size, because later segmentation may trigger BUG_ON(). Affected records list Linux versions including 4.13, 5.4.282, 5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3, and 6.11, with multiple stable backport commits referenced.

Likely exposure

Exposure is likely on systems running affected Linux kernel builds, especially where BPF and GSO-related network packet processing paths are reachable. Debian LTS and Siemens advisories indicate downstream products or distributions may need vendor-specific assessment.

Exploitation context

The bundle marks KEV as false and provides no source confirming active exploitation or public weaponization. The described failure is a kernel BUG_ON path, so the evidenced concern is reliability or availability rather than a proven privilege escalation or remote compromise.

Researcher notes

Key unknowns are exploit preconditions, required privileges, reachability through BPF hooks, and distribution-specific severity. The public description supports a segmentation-triggered kernel BUG risk, but not exploit chains, affected configurations, or reliable impact beyond the fixed kernel path.

Mitigation direction

  • Inventory Linux kernel versions across servers, appliances, containers hosts, and embedded systems.
  • Apply vendor kernel updates or stable backports that include the referenced fixes.
  • Check Debian LTS and Siemens guidance if those environments are in scope.
  • Prioritize internet-facing or high-throughput network systems after vendor severity confirmation.
  • Monitor vendor advisories for CVSS, exploitability notes, or affected product narrowing.

Validation and detection

  • Compare running kernel versions against the affected version list and vendor advisories.
  • Confirm patched kernels include one of the referenced stable commits or vendor equivalents.
  • Review asset inventory for Siemens products covered by SSA-265688.
  • Check Debian LTS package advisories for installed kernel package status.
  • Verify post-update systems boot the intended kernel version.
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-2024-42281 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
11Source 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

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux2be7e212d5419a400d051c84ca9fdd083e5aacac, 2be7e212d5419a400d051c84ca9fdd083e5aacac, 2be7e212d5419a400d051c84ca9fdd083e5aacac, 2be7e212d5419a400d051c84ca9fdd083e5aacac, 2be7e212d5419a400d051c84ca9fdd083e5aacac, 2be7e212d5419a400d051c84ca9fdd083e5aacac, 2be7e212d5419a400d051c84ca9fdd083e5aacacunaffected
LinuxLinux4.13, 0, 5.4.282, 5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

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