CVE-2021-20193
This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory.
Does this matter?
Lower severity and a low EPSS score (1.10%). Track it; it rarely justifies an emergency change on its own.
Description
A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.
- CVSS 3.1
- 3.3 LOWCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- EPSS
- 1.10% probability · 65th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-401, CWE-125
- Affected
- gnu/tar
- Source
- secalert@redhat.com
EPSS 1.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1917565Issue Tracking, Patch, Third Party Advisory
- https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777Mailing List, Patch, Third Party Advisory
- https://savannah.gnu.org/bugs/?59897Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202105-29Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1917565Issue Tracking, Patch, Third Party Advisory
- https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777Mailing List, Patch, Third Party Advisory
- https://savannah.gnu.org/bugs/?59897Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202105-29Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.