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Fencer Vulns
medium 6.1

CVE-2020-35738 json

WavPack 5.3.0 has an out-of-bounds write in WavpackPackSamples in pack_utils.c because of an integer overflow in a malloc argument.

published 2020-12-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23394

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

WavPack 5.3.0 has an out-of-bounds write in WavpackPackSamples in pack_utils.c because of an integer overflow in a malloc argument. NOTE: some third-parties claim that there are later "unofficial" releases through 5.3.2, which are also affected.

Patch / fix

  • wavpack Debian 14, Debian 13, Debian 12 5.3.0-2

debian advisories DEBIAN-CVE-2020-35738

  • wavpack Ubuntu 18.04 LTS 5.1.0-2ubuntu1.5
  • wavpack Ubuntu 20.04 LTS 5.2.0-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2020-35738

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • wavpack SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +14 more 4.60.99-5.9.1
  • wavpack SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 4.50.1-1.33.1
  • wavpack SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +12 more 5.4.0-4.9.1

suse advisories SUSE-SU-2021:0929-1SUSE-SU-2021:14669-1SUSE-SU-2021:0186-1

  • wavpack openSUSE Tumbleweed 5.4.0-1.6
  • wavpack openSUSE Leap 15.1 5.4.0-lp151.5.6.1
  • wavpack openSUSE Leap 15.2 5.4.0-lp152.7.3.1

opensuse advisories openSUSE-SU-2024:11505-1openSUSE-SU-2021:0154-1openSUSE-SU-2021:0153-1

  • wavpack Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 5.4.0-r0

alpine advisories ALPINE-CVE-2020-35738

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • wavpack Arch Linux 5.3.0-2

arch linux advisories AVG-1387

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-35738 updated cvss 6.1

wavpack: out-of-bounds write in WavpackPackSamples function in pack_utils.c

  • Red Hat Enterprise Linux 6 wavpack Red Hat Enterprise Linux 7 wavpack Red Hat Enterprise Linux 8 wavpack
    affected: workaround, no fix planned “If using the wavpack utility, this flaw can be mitigated by not running the program on untrusted input files or files from untrusted sources.”
  • Red Hat Enterprise Linux 9 wavpack
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.21% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/dbry/WavPack/issues/91 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.