Vulnerability Description
An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this flaw, a local attacker with user privilege may gain access to out-of-bounds memory, leading to a system integrity and confidentiality threat.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.16 |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
| Netapp | H500E Firmware | - |
| Netapp | H500E | - |
| Netapp | H700E Firmware | - |
| Netapp | H700E | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2025101Issue TrackingPatchThird Party Advisory
- https://lore.kernel.org/linux-nfs/163692036074.16710.5678362976688977923.stgit%4
- https://security.netapp.com/advisory/ntap-20220318-0010/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2025101Issue TrackingPatchThird Party Advisory
- https://lore.kernel.org/linux-nfs/163692036074.16710.5678362976688977923.stgit%4
- https://security.netapp.com/advisory/ntap-20220318-0010/Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
FAQ
What is CVE-2021-4090?
CVE-2021-4090 is a vulnerability with a CVSS score of 7.1 (HIGH). An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this flaw,...
How severe is CVE-2021-4090?
CVE-2021-4090 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4090?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Netapp H300S Firmware, Netapp H300S, Netapp H500S Firmware, Netapp H500S.