01 Record
CVE-2021-47356
mISDN: fix possible use-after-free in HFC_cleanup()
HighPUBLISHEDCNA: Linux
CNA base score7.7 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
02 Description
mISDN: fix possible use-after-free in HFC_cleanup()
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
- 0.26% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 18.6% of scored records. A rank, not a probability.
- NVD base score
- 7.7 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. 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
- 2024-05-21 14:35Z2 YR AGO
- Last updated
- 2026-05-11 13:53Z5 MO AGO
- Reserved
- 2024-05-21
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.7)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.2
- Document digest
- 28c7a2af8bb951f4eca94427d0848ccb1dca6459a308ce0261e8753f2099e4a6
05 Affected products
VendorProductVersionsPlatforms
LinuxLinux87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 54ff3202928952a100c477248e65ac6db01258a7, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 7867ddc5f3de7f289aee63233afc0df4b62834c5, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 5f2818185da0fe82a932f0856633038b66faf124, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 3ecd228c636ee17c14662729737fa07242a93cb0, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 61370ff07e0acc657559a8fac02551dfeb9d3020, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda, 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 to < 009fc857c5f6fda81f2f7dd851b2d54193a8e733, 2.6.29—
linuxlinux_kernel1da177e4c3f4 to < 49331c07ef0f, 1da177e4c3f4 to < 54ff32029289, 1da177e4c3f4 to < 7867ddc5f3de, 1da177e4c3f4 to < 5f2818185da0, 1da177e4c3f4 to < 3ecd228c636e, 1da177e4c3f4 to < b7ee9ae1e0cf, 1da177e4c3f4 to < 61370ff07e0a, 1da177e4c3f4 to < ed7c3739d0a0, 1da177e4c3f4 to < 009fc857c5f6—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe
- git.kernel.orghttps://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7
- git.kernel.orghttps://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5
- git.kernel.orghttps://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124
- git.kernel.orghttps://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0
- git.kernel.orghttps://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d
- git.kernel.orghttps://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020
- git.kernel.orghttps://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda
- git.kernel.orghttps://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-553.8.1.el8_10
- kernel Fixed in 4.18.0-553.8.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.8.1.el8_10
- kernel-core Fixed in 4.18.0-553.8.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.8.1.el8_10
- kernel-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-doc Fixed in 4.18.0-553.8.1.el8_10
- kernel-headers Fixed in 4.18.0-553.8.1.el8_10
- kernel-modules Fixed in 4.18.0-553.8.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.8.1.el8_10
- kernel-rt Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-core Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-kvm Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-kvm Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-tools Fixed in 4.18.0-553.8.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.8.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.8.1.el8_10
- perf Fixed in 4.18.0-553.8.1.el8_10
- python3-perf Fixed in 4.18.0-553.8.1.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 4.18.0-553.8.1.el8_10
- kernel Fixed in 4.18.0-553.8.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.8.1.el8_10
- kernel-core Fixed in 4.18.0-553.8.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.8.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.8.1.el8_10
- kernel-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-doc Fixed in 4.18.0-553.8.1.el8_10
- kernel-headers Fixed in 4.18.0-553.8.1.el8_10
- kernel-modules Fixed in 4.18.0-553.8.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.8.1.el8_10
- kernel-rt Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-core Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-kvm Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-kvm Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.8.1.rt7.349.el8_10
- kernel-tools Fixed in 4.18.0-553.8.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.8.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.8.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.8.1.el8_10
- perf Fixed in 4.18.0-553.8.1.el8_10
- python3-perf Fixed in 4.18.0-553.8.1.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 5.14.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.14.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.14.6-1
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 Fixed in 4.15.0-156.163
- linux-aws Fixed in 4.15.0-1111.118
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1056.59~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1123.136
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1058.60~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1108.122
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1052.56~18.04.1
- 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 5.4.0-84.94~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1099.101
- linux-oem No fix yet
- linux-oracle Fixed in 4.15.0-1080.88
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1054.58~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1043.47~18.04.1
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 5.4.0-84.94
- linux-aws Fixed in 5.4.0-1056.59
- 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 5.4.0-1058.60
- 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 5.4.0-1019.22
- linux-gcp Fixed in 5.4.0-1052.56
- 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 5.4.0-1023.24
- 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 5.4.0-1046.48
- 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 5.4.0-1054.58
- 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 5.4.0-1043.47
- 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 14.04 LTS
- linux No fix yet
- linux-aws No fix yet
- linux-azure Fixed in 4.15.0-1123.136~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- linux No fix yet
- linux-aws No fix yet
- linux-aws-hwe Fixed in 4.15.0-1111.118~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1123.136~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp Fixed in 4.15.0-1108.122~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe Fixed in 4.15.0-156.163~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-kvm No fix yet
- linux-oracle Fixed in 4.15.0-1080.88~16.04.1Available with Ubuntu Pro (Infra-only): 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-updates 16.04 LTS
- linux-fips 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 18.04 LTS
- linux-aws-fips Fixed in 4.15.0-2053.55Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2035.39Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1069.78Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 4.15.0-2018.20Available 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-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 5.4.0-1033.38Available 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 16.04 LTS
- linux-fips 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 18.04 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.
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.