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    2 vulnerabilities by klauspost

    CVE-2026-63209 (GCVE-0-2026-63209)

    Vulnerability from nvd – Published: 2026-09-29 14:58 – Updated: 2026-09-29 16:32
    VLAI
    Title
    Integer Overflow or Wraparound and Out-of-bounds Write in compress
    Summary
    compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-29 16:31 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    • CWE-787 - Out-of-bounds Write
    Assigner
    References
    Impacted products
    Vendor Product Version
    klauspost compress Affected: < 1.18.7
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-63209 (GCVE-0-2026-63209)

    Vulnerability from cvelistv5 – Published: 2026-09-29 14:58 – Updated: 2026-09-29 16:32
    VLAI
    Title
    Integer Overflow or Wraparound and Out-of-bounds Write in compress
    Summary
    compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-29 16:31 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    • CWE-787 - Out-of-bounds Write
    Assigner
    References
    Impacted products
    Vendor Product Version
    klauspost compress Affected: < 1.18.7
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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