CVE-2021-4090
First published: Fri Nov 19 2021(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.16 | |
| Linux Linux kernel | =5.16 | |
| Linux Linux kernel | =5.16-rc1 | |
| Apple macOS Ventura | ||
| Apple macOS Big Sur | ||
| Apple macOS Big Sur | ||
| Apple macOS Ventura | ||
| Apple macOS Big Sur | ||
| Apple macOS Monterey | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| Apple macOS Monterey | ||
| Apple macOS Monterey | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| ubuntu/linux | <5.13.0-28.31 | 5.13.0-28.31 |
| ubuntu/linux | <5.16~ | 5.16~ |
| ubuntu/linux-aws | <5.13.0-1012.13 | 5.13.0-1012.13 |
| ubuntu/linux-aws | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.0 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.11 | <5.11.0-1028.31~20.04.1 | 5.11.0-1028.31~20.04.1 |
| ubuntu/linux-aws-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.13 | <5.13.0-1012.13~20.04.1 | 5.13.0-1012.13~20.04.1 |
| ubuntu/linux-aws-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-hwe | <5.16~ | 5.16~ |
| ubuntu/linux-azure | <5.16~ | 5.16~ |
| ubuntu/linux-azure | <5.13.0-1013.15 | 5.13.0-1013.15 |
| ubuntu/linux-azure-4.15 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.11 | <5.11.0-1028.31~20.04.2 | 5.11.0-1028.31~20.04.2 |
| ubuntu/linux-azure-5.13 | <5.13.0-1013.15~20.04.1 | 5.13.0-1013.15~20.04.1 |
| ubuntu/linux-azure-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-edge | <5.16~ | 5.16~ |
| ubuntu/linux-azure-fde | <5.16~ | 5.16~ |
| ubuntu/linux-bluefield | <5.16~ | 5.16~ |
| ubuntu/linux-dell300x | <5.16~ | 5.16~ |
| ubuntu/linux-fips | <5.16~ | 5.16~ |
| ubuntu/linux-gcp | <5.16~ | 5.16~ |
| ubuntu/linux-gcp | <5.13.0-1013.16 | 5.13.0-1013.16 |
| ubuntu/linux-gcp-4.15 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.11 | <5.11.0-1029.33~20.04.3 | 5.11.0-1029.33~20.04.3 |
| ubuntu/linux-gcp-5.13 | <5.13.0-1013.16~20.04.1 | 5.13.0-1013.16~20.04.1 |
| ubuntu/linux-gcp-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-gke | <5.16~ | 5.16~ |
| ubuntu/linux-gke-4.15 | <5.16~ | 5.16~ |
| ubuntu/linux-gke-5.0 | <5.16~ | 5.16~ |
| ubuntu/linux-gke-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-gke-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-gkeop | <5.16~ | 5.16~ |
| ubuntu/linux-gkeop-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.13 | <5.13.0-28.31~20.04.1 | 5.13.0-28.31~20.04.1 |
| ubuntu/linux-hwe-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-edge | <5.16~ | 5.16~ |
| ubuntu/linux-ibm | <5.16~ | 5.16~ |
| ubuntu/linux-ibm-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-intel-5.13 | <5.13.0-1010.10 | 5.13.0-1010.10 |
| ubuntu/linux-intel-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-kvm | <5.16~ | 5.16~ |
| ubuntu/linux-kvm | <5.13.0-1011.12 | 5.13.0-1011.12 |
| ubuntu/linux-lowlatency | <5.16~ | 5.16~ |
| ubuntu/linux-lts-xenial | <5.16~ | 5.16~ |
| ubuntu/linux-oem | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.10 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.13 | <5.13.0-1029.36 | 5.13.0-1029.36 |
| ubuntu/linux-oem-5.14 | <5.14.0-1018.19 | 5.14.0-1018.19 |
| ubuntu/linux-oem-5.17 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.6 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-osp1 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle | <5.13.0-1016.20 | 5.13.0-1016.20 |
| ubuntu/linux-oracle | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.0 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.11 | <5.11.0-1028.31~20.04.1 | 5.11.0-1028.31~20.04.1 |
| ubuntu/linux-oracle-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.13 | <5.13.0-1016.20~20.04.1 | 5.13.0-1016.20~20.04.1 |
| ubuntu/linux-oracle-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-raspi | <5.13.0-1016.18 | 5.13.0-1016.18 |
| ubuntu/linux-raspi | <5.16~ | 5.16~ |
| ubuntu/linux-raspi-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-raspi2 | <5.16~ | 5.16~ |
| ubuntu/linux-raspi2-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-riscv | <5.13.0-1011.12 | 5.13.0-1011.12 |
| ubuntu/linux-riscv | <5.16~ | 5.16~ |
| ubuntu/linux-riscv-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-riscv-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-snapdragon | <5.16~ | 5.16~ |
| All of | ||
| Apple macOS Ventura | ||
| Apple macOS Big Sur | ||
| All of | ||
| Apple macOS Big Sur | ||
| Apple macOS Ventura | ||
| All of | ||
| Apple macOS Big Sur | ||
| Apple macOS Monterey | ||
| All of | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| All of | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| All of | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| All of | ||
| Apple macOS Monterey | ||
| Apple macOS Monterey | ||
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| redhat/kernel | <5.16 | 5.16 |
| debian/linux | 4.19.249-2 4.19.304-1 5.10.197-1 5.10.205-2 6.1.66-1 6.1.69-1 6.6.13-1 6.6.15-2 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2025101
- https://lore.kernel.org/linux-nfs/163692036074.16710.5678362976688977923.stgit@klimt.1015granger.net/
- https://security.netapp.com/advisory/ntap-20220318-0010/
- https://launchpad.net/bugs/cve/CVE-2021-4090
- https://lore.kernel.org/linux-nfs/163692036074.16710.5678362976688977923.stgit%40klimt.1015granger.net/
- https://lore.kernel.org/linux-nfs/97860.1636837122@crash.local/
- https://access.redhat.com/security/cve/cve-2021-4090
- https://git.kernel.org/linus/c0019b7db1d7ac62c711cda6b357a659d46428fe
- https://security-tracker.debian.org/tracker/CVE-2021-4090
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4090
- https://git.kernel.org/linus/c0019b7db1d7ac62c711cda6b357a659d46428fe (5.16-rc2)
- https://ubuntu.com/security/notices/USN-5217-1
- https://ubuntu.com/security/notices/USN-5265-1
- https://ubuntu.com/security/notices/USN-5362-1
- https://nvd.nist.gov/vuln/detail/CVE-2021-4090
- https://git.kernel.org/linus/d1c263a031e876ac3ca5223c728e4d98ed50b3c0
- https://ubuntu.com/security/CVE-2021-4090
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/launchpad-cve
- source/Launchpad
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-index
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-4090
- collector/security-tracker-debian
- source/Debian
- collector/usn-cve
- source/Ubuntu
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.16
- version/linux linux kernel/5.16-rc1
- vendor/netapp
- canonical/apple macos ventura
- canonical/apple macos big sur
- canonical/apple macos monterey
- canonical/netapp h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410c firmware
- canonical/netapp h410c
- package-manager/redhat
- package-manager/debian
- package-manager/ubuntu