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CVE-2021-4048An 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…
- 9.1CriticalCVSS base score
- 2.8%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 6 days later
· 6 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Affected products
lapack
- affected lapack through version 3.10.0
References
References9
- https://github.com/Reference-LAPACK/lapack/pull/625 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/Reference-LAPACK/lapack/commit/38f3eeee3108b18158409ca2a100e6fe03754781 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/JuliaLang/julia/issues/42415 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/xianyi/OpenBLAS/commit/337b65133df174796794871b3988cd03426e6d41 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/xianyi/OpenBLAS/commit/2be5ee3cca97a597f2ee2118808a2d5eacea050c (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/xianyi/OpenBLAS/commit/fe497efa0510466fd93578aaf9da1ad8ed4edbe7 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/xianyi/OpenBLAS/commit/ddb0ff5353637bb5f5ad060c9620e334c143e3d7 (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2021-0d4b58060d (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-aec9d01057 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-33945 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-4048)Record last updated .