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CVE Record

CVE-2025-21711: net/rose: prevent integer overflows in rose_setsockopt()

In the Linux kernel, the following vulnerability has been resolved: net/rose: prevent integer overflows in rose_setsockopt() In case of possible unpredictably large arguments passed to rose_setsockopt() and multiplied by extra values on top of that, integer overflows may occur. Do the safest minimum and fix these issues by checking the contents of 'opt' and returning -EINVAL if they are too large. Also, switch to unsigned int and remove useless check for negative 'opt' in ROSE_IDLE case.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2025-21711 is a Linux kernel flaw in the ROSE networking socket option handling. Very large option values can overflow integer calculations. The source bundle does not provide a CVSS score, confirmed impact, or exploit evidence, so urgency should be driven by kernel exposure and vendor patch availability.

Executive priority

Treat this as a patch-management item unless local kernel attack surface is broad or affected appliances are exposed. The missing severity score and absent exploitation evidence argue against emergency handling, but kernel flaws can matter in multi-user or appliance environments.

Technical view

The issue is in net/rose rose_setsockopt(). Large user-supplied option values may be multiplied and overflow. The upstream fix validates opt values, returns -EINVAL when too large, and changes ROSE_IDLE handling to unsigned int logic. Multiple stable kernel commits and downstream advisories are referenced.

Likely exposure

Exposure is most likely on Linux systems running affected kernel versions with ROSE networking support reachable by local processes. The bundle does not prove remote exposure, default enablement, privilege requirements, or which distributions are affected beyond referenced Debian and Siemens advisories.

Exploitation context

The bundle marks KEV as false and provides no source claiming active exploitation or public exploit use. It only describes a resolved kernel integer overflow condition in rose_setsockopt(), so exploitation context remains incomplete.

Researcher notes

Key gaps are impact, triggerability, privilege requirements, and affected distro backports. Validation should focus on whether rose_setsockopt() is reachable on deployed kernels and whether vendor updates include the stable commits listed in the CVE references.

Mitigation direction

  • Apply Linux kernel updates containing the referenced stable ROSE fixes.
  • Use distribution security updates where available, including relevant Debian LTS guidance.
  • Check Siemens guidance for affected Siemens-managed products or appliances.
  • If no vendor package is available, follow vendor kernel backport guidance.
  • Reduce unnecessary ROSE networking exposure where operationally safe.

Validation and detection

  • Inventory Linux kernel versions across servers, endpoints, and appliances.
  • Confirm whether ROSE networking support is built, loadable, or enabled.
  • Map installed kernels against vendor fixed packages or referenced stable commits.
  • Review Debian and Siemens advisories for product-specific applicability.
  • Track exceptions where embedded systems cannot receive kernel updates quickly.
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-2025-21711 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
11Source 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
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2unaffected
LinuxLinux2.6.12, 0, 5.10.235, 5.15.179, 6.1.129, 6.6.76, 6.12.13, 6.13.2, 6.14affected
Weakness

CWE details

No CWE listed

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