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Vulnerabilities

Threat intelligence · CVE-2021-3490

vulnerabilidad eBPF del kernel de Linux CVE-2021-3490 El seguimiento de límites de eBPF ALU32 para operaciones bit a bit (AND, OR y XOR) en el kernel de Linux no actua…

Published Aug 20, 2021 · the affected product

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2021-3490 is not in CISA KEV. FIRST estimates a 27.38% chance of exploitation in the next 30 days. Check whether you run the affected product.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
27.38%
Remediation
Not established
Affected products
See sources for product scope

vulnerabilidad eBPF del kernel de Linux CVE-2021-3490 El seguimiento de límites de eBPF ALU32 para operaciones bit a bit (AND, OR y XOR) en el kernel de Linux no actualizó correctamente los límites de 32 bits, lo que podría convertirse en lecturas y escrituras fuera de límites en el kernel de Linux y, por lo tanto, ejecución de código arbitrario. Este problema se solucionó mediante la confirmación 049c4e13714e ("bpf:

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2021-3490

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-3490 is not in CISA KEV. FIRST estimates a 27.38% chance of exploitation in the next 30 days. Check whether you run the affected product.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 27.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 20, 2021 · AlienVault OTX

    Detected

    vulnerabilidad eBPF del kernel de Linux CVE-2021-3490 El seguimiento de límites de eBPF ALU32 para operaciones bit a bit (AND, OR y XOR) en el kernel de Linux no actualizó correctamente los límites de 32 bits, lo que podría convertirse en lecturas y escrituras fuera de límites en el kernel de Linux y, por lo tanto, ejecución de código arbitrario. Este problema se solucionó mediante la confirmación

Sources

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • AlienVault OTXNov 1, 2026