Race Condition The advisory has been revoked - it doesn't affect any version of package mcg.src (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-RHEL10-MCGSRC-14923106
- published14 Jan 2026
- disclosed5 Aug 2021
Introduced: 5 Aug 2021
CVE-2021-36221 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mcg.src package and not the mcg.src package as distributed by RHEL.
Go before 1.15.15 and 1.16.x before 1.16.7 has a race condition that can lead to a net/http/httputil ReverseProxy panic upon an ErrAbortHandler abort.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1995656
- https://access.redhat.com/security/cve/CVE-2021-36221
- https://groups.google.com/forum/#!forum/golang-announce
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2MU47VKTNXX33ZDLTI2ORRUY3KLJKU6G/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HM7U5JNS5WU66Q3S26PFIU2ITB2ATTQ4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4AMYYHGBYMIWCCR5RCDFI5RAUJOPO5L/
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://groups.google.com/forum/#%21forum/golang-announce
- https://groups.google.com/g/golang-announce/c/JvWG9FUUYT0
- https://groups.google.com/g/golang-announce/c/uHACNfXAZqk
- https://lists.debian.org/debian-lts-announce/2022/01/msg00016.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00017.html
- https://lists.debian.org/debian-lts-announce/2023/04/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2MU47VKTNXX33ZDLTI2ORRUY3KLJKU6G/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HM7U5JNS5WU66Q3S26PFIU2ITB2ATTQ4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4AMYYHGBYMIWCCR5RCDFI5RAUJOPO5L/
- https://security.gentoo.org/glsa/202208-02
- https://www.oracle.com/security-alerts/cpujan2022.html