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Vulnerabilities

Vulnerability · CVE-2011-5320

scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0s.

Published Oct 18, 2017 · catalog updated Oct 23, 2026 · scanf and related functions

Check if you run it

No confirmed exploitation is on record for CVE-2011-5320. EPSS is 0.47%. Act only if a listed version of scanf and related functions is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (scanf and related functions).
  • 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
0.47%
Remediation
Advisory link
Affected products
Debian:12 glibc · Debian:13 glibc · Debian:14 glibc

scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0s.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 glibc0 → 2.15
  • Debian:13 glibc0 → 2.15
  • Debian:14 glibc0 → 2.15

How to fix CVE-2011-5320

What to do

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

Should you patch?

No confirmed exploitation is on record for CVE-2011-5320. EPSS is 0.47%. Act only if a listed version of scanf and related functions is installed.

Which versions are affected?

Compare what you have installed with 0 → 2.15. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.47%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

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. Oct 18, 2017 · OpenSSF OSV / OSV Scanner

    Detected

    scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0s.

  2. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    glibc fixed in 2.15; glibc fixed in 2.15; glibc fixed in 2.15

  3. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    glibc fixed in 2.15

  4. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0s.

Sources

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.