CVE-2021-4048

Description

An out-of-bounds read flaw was found in the CLARRV, DLARRV, SLARRV, and ZLARRV functions in lapack through version 3.10.0, as also used in OpenBLAS before version 0.3.18. Specially crafted inputs passed to these functions could cause an application using lapack to crash or possibly disclose portions of its memory.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.23%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org
Affected: n/a lapack
Published at:
Updated at:

References

Link Tags
https://github.com/Reference-LAPACK/lapack/pull/625 issue tracking third party advisory patch
https://github.com/Reference-LAPACK/lapack/commit/38f3eeee3108b18158409ca2a100e6fe03754781 third party advisory patch
https://github.com/JuliaLang/julia/issues/42415 issue tracking third party advisory patch
https://github.com/xianyi/OpenBLAS/commit/337b65133df174796794871b3988cd03426e6d41 third party advisory patch
https://github.com/xianyi/OpenBLAS/commit/2be5ee3cca97a597f2ee2118808a2d5eacea050c third party advisory patch
https://github.com/xianyi/OpenBLAS/commit/fe497efa0510466fd93578aaf9da1ad8ed4edbe7 third party advisory patch
https://github.com/xianyi/OpenBLAS/commit/ddb0ff5353637bb5f5ad060c9620e334c143e3d7 third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DROZM4M2QRKSD6FBO4BHSV2QMIRJQPHT/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6QFEVOCUG2UXMVMFMTU4ONJVDEHY2LW2/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-4048?
CVE-2021-4048 has been scored as a critical severity vulnerability.
How to fix CVE-2021-4048?
To fix CVE-2021-4048, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4048 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-4048 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4048?
CVE-2021-4048 affects n/a lapack.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.