01 Record
CVE-2021-46984
kyber: fix out of bounds access when preempted
HighPUBLISHEDCNA: Linux
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
02 Description
kyber: fix out of bounds access when preempted
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.25% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 17.3% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-08-04.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2024-02-28 08:13Z2 YR AGO
- Last updated
- 2026-08-05 08:45Z2 MO AGO
- Reserved
- 2024-02-27
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.8)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- b8330939fbffa5ce1d010c82b34d6c985084d58b461840d5a74c51366c5d4619
05 Affected products
VendorProductVersionsPlatforms
LinuxLinuxa6088845c2bf754d6cb2572b484180680b037804 to < 0b6b4b90b74c27bea968c214d820ba4254b903a5, a6088845c2bf754d6cb2572b484180680b037804 to < 54dbe2d2c1fcabf650c7a8b747601da355cd7f9f, a6088845c2bf754d6cb2572b484180680b037804 to < a287cd84e047045f5a4d4da793414e848de627c6, a6088845c2bf754d6cb2572b484180680b037804 to < 2ef3c76540c49167a0bc3d5f80d00fd1fc4586df, a6088845c2bf754d6cb2572b484180680b037804 to < efed9a3337e341bd0989161b97453b52567bc59d, 4.18—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/0b6b4b90b74c27bea968c214d820ba4254b903a5
- git.kernel.orghttps://git.kernel.org/stable/c/54dbe2d2c1fcabf650c7a8b747601da355cd7f9f
- git.kernel.orghttps://git.kernel.org/stable/c/a287cd84e047045f5a4d4da793414e848de627c6
- git.kernel.orghttps://git.kernel.org/stable/c/2ef3c76540c49167a0bc3d5f80d00fd1fc4586df
- git.kernel.orghttps://git.kernel.org/stable/c/efed9a3337e341bd0989161b97453b52567bc59d
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-553.22.1.el8_10
- kernel Fixed in 4.18.0-553.22.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.22.1.el8_10
- kernel-core Fixed in 4.18.0-553.22.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.22.1.el8_10
- kernel-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-doc Fixed in 4.18.0-553.22.1.el8_10
- kernel-headers Fixed in 4.18.0-553.22.1.el8_10
- kernel-modules Fixed in 4.18.0-553.22.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.22.1.el8_10
- kernel-rt Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-core Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-kvm Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-kvm Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-tools Fixed in 4.18.0-553.22.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.22.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.22.1.el8_10
- perf Fixed in 4.18.0-553.22.1.el8_10
- python3-perf Fixed in 4.18.0-553.22.1.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- bpftool Fixed in 4.18.0-553.22.1.el8_10
- kernel Fixed in 4.18.0-553.22.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.22.1.el8_10
- kernel-core Fixed in 4.18.0-553.22.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.22.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.22.1.el8_10
- kernel-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-doc Fixed in 4.18.0-553.22.1.el8_10
- kernel-headers Fixed in 4.18.0-553.22.1.el8_10
- kernel-modules Fixed in 4.18.0-553.22.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.22.1.el8_10
- kernel-rt Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-core Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-kvm Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-kvm Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.22.1.rt7.363.el8_10
- kernel-tools Fixed in 4.18.0-553.22.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.22.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.22.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.22.1.el8_10
- perf Fixed in 4.18.0-553.22.1.el8_10
- python3-perf Fixed in 4.18.0-553.22.1.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 5.10.38-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.10.38-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.10.38-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1054.57~18.04.1
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1055.57~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1049.53~18.04.1
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-hwe-5.4 Fixed in 5.4.0-80.90~18.04.1
- linux-hwe-edge No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1052.56~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1041.45~18.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux Fixed in 5.4.0-80.90
- linux-aws Fixed in 5.4.0-1054.57
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.8 No fix yet
- linux-azure Fixed in 5.4.0-1055.57
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.8 No fix yet
- linux-azure-fde No fix yet
- linux-bluefield Fixed in 5.4.0-1016.19
- linux-gcp Fixed in 5.4.0-1049.53
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.8 No fix yet
- linux-gke No fix yet
- linux-gke-5.15 No fix yet
- linux-gkeop Fixed in 5.4.0-1021.22
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-intel-5.13 No fix yet
- linux-kvm Fixed in 5.4.0-1044.46
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle Fixed in 5.4.0-1052.56
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.8 No fix yet
- linux-raspi Fixed in 5.4.0-1041.45
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 No fix yet
- linux-riscv-5.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux-allwinner-5.19 No fix yet
- linux-aws-5.19 No fix yet
- linux-aws-6.2 No fix yet
- linux-azure-5.19 No fix yet
- linux-azure-6.2 No fix yet
- linux-azure-fde-5.19 No fix yet
- linux-azure-fde-6.2 No fix yet
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 No fix yet
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 No fix yet
- linux-intel-iot-realtime No fix yet
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 No fix yet
- linux-nvidia-6.2 No fix yet
- linux-oem-5.17 No fix yet
- linux-oem-6.0 No fix yet
- linux-oem-6.1 No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
- linux-riscv-5.19 No fix yet
- linux-starfive-5.19 No fix yet
- linux-starfive-6.2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-raspi-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 20.04 LTS
- linux-aws-fips Fixed in 5.4.0-1069.73+fips2Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.4.0-1073.76+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 5.4.0-1031.36Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.4.0-1067.71~20.04.1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 20.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.