01 Record
CVE-2021-47527
serial: core: fix transmit-buffer reset and memleak
UnratedPUBLISHEDCNA: Linux
CNA base scoreUnratedNo CNA CVSS vector
02 Description
serial: core: fix transmit-buffer reset and memleak
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 16.2% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (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:N/I:N/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- 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
- 2024-05-24 15:09Z2 YR AGO
- Last updated
- 2026-05-11 13:56Z5 MO AGO
- Reserved
- 2024-05-24
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.2
- Document digest
- ead1fe909abe7e622699a41b72bcb5eeb4f4173acb1bfdd72885be956f1734c1
05 Affected products
VendorProductVersionsPlatforms
LinuxLinux761ed4a94582ab291aa24dcbea4e01e8936488c8 to < 011f6c92b5bf6e1fbfdedc8b5232f64c1c493206, 761ed4a94582ab291aa24dcbea4e01e8936488c8 to < e74d9663fd57640fc3394abb5c76fa95b9cc2f2e, 761ed4a94582ab291aa24dcbea4e01e8936488c8 to < 1179b168fa3f3a6aae3bd140000455a0e58457db, 761ed4a94582ab291aa24dcbea4e01e8936488c8 to < c5da8aa441053958594f94254592bb41264bdfbf, 761ed4a94582ab291aa24dcbea4e01e8936488c8 to < e1722acf4f0d4d67b60f57e08ce16f8b66cd4b8f, 761ed4a94582ab291aa24dcbea4e01e8936488c8 to < 64e491c1634b73d3bddc081d08620bdc92ab2c12, 761ed4a94582ab291aa24dcbea4e01e8936488c8 to < 00de977f9e0aa9760d9a79d1e41ff780f74e3424, 4.9—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/011f6c92b5bf6e1fbfdedc8b5232f64c1c493206
- git.kernel.orghttps://git.kernel.org/stable/c/e74d9663fd57640fc3394abb5c76fa95b9cc2f2e
- git.kernel.orghttps://git.kernel.org/stable/c/1179b168fa3f3a6aae3bd140000455a0e58457db
- git.kernel.orghttps://git.kernel.org/stable/c/c5da8aa441053958594f94254592bb41264bdfbf
- git.kernel.orghttps://git.kernel.org/stable/c/e1722acf4f0d4d67b60f57e08ce16f8b66cd4b8f
- git.kernel.orghttps://git.kernel.org/stable/c/64e491c1634b73d3bddc081d08620bdc92ab2c12
- git.kernel.orghttps://git.kernel.org/stable/c/00de977f9e0aa9760d9a79d1e41ff780f74e3424
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 5.15.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.15.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.15.15-1
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 4.15.0-169.177
- linux-aws Fixed in 4.15.0-1121.129
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1066.69~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1131.144
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1070.73~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1116.130
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1065.69~18.04.1
- 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 5.4.0-100.113~18.04.1
- linux-hwe-edge No fix yet
- linux-ibm-5.4 Fixed in 5.4.0-1015.16~18.04.1
- linux-kvm Fixed in 4.15.0-1107.109
- linux-oem No fix yet
- linux-oracle Fixed in 4.15.0-1087.95
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1064.68~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1053.60~18.04.1
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 5.4.0-100.113
- linux-aws Fixed in 5.4.0-1066.69
- 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 5.4.0-1070.73
- 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 5.4.0-1028.31
- linux-gcp Fixed in 5.4.0-1065.69
- 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 5.4.0-1034.35
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-ibm Fixed in 5.4.0-1015.16
- linux-intel-5.13 No fix yet
- linux-kvm Fixed in 5.4.0-1056.58
- 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 5.4.0-1064.68
- 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 5.4.0-1053.60
- 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-azure Fixed in 4.15.0-1131.144~14.04.1Available 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 16.04 LTS
- linux-aws-hwe Fixed in 4.15.0-1120.128~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1131.144~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp Fixed in 4.15.0-1116.130~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe Fixed in 4.15.0-169.177~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-oracle Fixed in 4.15.0-1087.95~16.04.1Available 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 18.04 LTS
- linux-aws-fips Fixed in 4.15.0-2061.63Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2043.47Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1078.87Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 4.15.0-2026.28Available 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 5.4.0-1043.49Available 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 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.