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Vulnerabilities

Vulnerability · CVE-2022-48303

GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump.

Published Jan 30, 2023 · catalog updated Oct 15, 2026 · GNU Tar through 1.34

Check if you run it

No confirmed exploitation is on record for CVE-2022-48303. EPSS is 1.48%. Act only if a listed version of GNU Tar through 1.34 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (GNU Tar through 1.34).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.48%
Remediation
Advisory link
Affected products
Alpine:v3.14 tar · Alpine:v3.15 tar · Alpine:v3.16 tar · Alpine:v3.17 tar · Alpine:v3.18 tar · Alpine:v3.19 tar

GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

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.

  • Alpine:v3.14 tar0 → 1.34-r1
  • Alpine:v3.15 tar0 → 1.34-r1
  • Alpine:v3.16 tar0 → 1.34-r1
  • Alpine:v3.17 tar0 → 1.34-r2
  • Alpine:v3.18 tar0 → 1.34-r2
  • Alpine:v3.19 tar0 → 1.34-r2
  • Alpine:v3.20 tar0 → 1.34-r2
  • Alpine:v3.21 tar0 → 1.34-r2
  • Alpine:v3.22 tar0 → 1.34-r2
  • Alpine:v3.23 tar0 → 1.34-r2
  • Alpine:v3.24 tar0 → 1.34-r2
  • cpe fedoraproject/fedora37
  • cpe fedoraproject/fedora38
  • cpe gnu/tarversion unspecified

How to fix CVE-2022-48303

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-2022-48303. EPSS is 1.48%. Act only if a listed version of GNU Tar through 1.34 is installed.

Which versions are affected?

Compare what you have installed with 0 → 1.34-r1, 0 → 1.34-r2, 37, 38. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-125: Out-of-bounds Read. EPSS 1.48%. 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. Jan 30, 2023 · NIST NVD

    Detected

    GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

  2. Oct 14, 2026 · NIST NVD

    Updated

    GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

  3. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    tar fixed in 1.34-r1; tar fixed in 1.34-r1; tar fixed in 1.34-r1; tar fixed in 1.34-r2

  4. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    tar fixed in 1.34-r1

  5. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    tar fixed in 1.34-r2

  6. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

Sources

  • CVE.orgVulnerability recordCVE-2022-48303

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-48303

    30-day exploitation probability 1.5%

    first.org
  • NIST NVDVulnerability recordCVE-2022-48303

    GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approxima

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryALPINE-CVE-2022-48303
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2022-48303

    GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approxima

    osv.dev

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.