CVE-2021-39140
In affected versions this vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input…
Does this matter?
Lower severity and a low EPSS score (5.92%). Track it; it rarely justifies an emergency change on its own.
Description
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
- CVSS 3.1
- 6.3 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
- EPSS
- 5.92% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-502, CWE-835
- Affected
- xstream/xstream · debian/debian linux · fedoraproject/fedora · netapp/snapmanager · oracle/business activity monitoring · oracle/commerce guided search · oracle/communications billing and revenue management elastic charging engine · oracle/communications cloud native core automated test suite · oracle/communications cloud native core binding support function · oracle/communications cloud native core policy · oracle/communications unified inventory management · oracle/retail xstore point of service · oracle/utilities framework · oracle/utilities testing accelerator · oracle/webcenter portal
- Source
- security-advisories@github.com
EPSS 5.9% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/x-stream/xstream/security/advisories/GHSA-6wf9-jmg9-vxccThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00017.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/Mailing List
- https://security.netapp.com/advisory/ntap-20210923-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-5004Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
- https://x-stream.github.io/CVE-2021-39140.htmlExploit, Third Party Advisory
- https://github.com/x-stream/xstream/security/advisories/GHSA-6wf9-jmg9-vxccThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00017.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/Mailing List
- https://security.netapp.com/advisory/ntap-20210923-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-5004Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
- https://x-stream.github.io/CVE-2021-39140.htmlExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.