CVE-2021-47132:In the Linux kernel, the following vulnerability has been resolved: mptcp: fix sk_forward_memory corruption on retransmission MPTCP sk_forward_memory handling is a bit special, as such field is protected by the msk socket spin_lock, instead of the plain socket lock. Currently we have a code path updating such field without handling the relevant lock: __mptcp_retrans() -> __mptcp_clean_una_wakeup() Several helpers in __mptcp_clean_una_wakeup() will update sk_forward_alloc, possibly causing such field corruption, as reported by Matthieu. Address the issue providing and using a new variant of blamed function which explicitly acquires the msk spin lock.

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In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix sk_forward_memory corruption on retransmission

MPTCP sk_forward_memory handling is a bit special, as such field is protected by the msk socket spin_lock, instead of the plain socket lock.

Currently we have a code path updating such field without handling the relevant lock:

__mptcp_retrans() -> __mptcp_clean_una_wakeup()

Several helpers in __mptcp_clean_una_wakeup() will update sk_forward_alloc, possibly causing such field corruption, as reported by Matthieu.

Address the issue providing and using a new variant of blamed function which explicitly acquires the msk spin lock.

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Manufacturing
    Manufacturing
  2. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  3. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  4. Finance and Insurance
    Finance and Insurance
  5. Retail Trade
    Retail Trade
  6. Management of Companies & Enterprises
    Management of Companies & Enterprises
  7. Transportation & Warehousing
    Transportation & Warehousing
  8. Other Services (except Public Administration)
    Other Services (except Public Administration)
  9. Public Administration
    Public Administration
  10. Accommodation & Food Services
    Accommodation & Food Services
  11. Administrative, Support, Waste Management & Remediation Services
    Administrative, Support, Waste Management & Remediation Services
  12. Agriculture, Forestry Fishing & Hunting
    Agriculture, Forestry Fishing & Hunting
  13. Construction
    Construction
  14. Educational Services
    Educational Services
  15. Health Care & Social Assistance
    Health Care & Social Assistance
  16. Information
    Information
  17. Mining
    Mining
  18. Real Estate Rental & Leasing
    Real Estate Rental & Leasing
  19. Utilities
    Utilities
  20. Wholesale Trade
    Wholesale Trade

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