01 Record
CVE-2021-47013
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
CriticalPUBLISHEDCNA: Linux
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
02 Description
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
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
- 0.79% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 56.0% 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
- 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
- 2024-02-28 08:13Z2 YR AGO
- Last updated
- 2026-08-05 08:45Z2 MO AGO
- Reserved
- 2024-02-27
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.2
- Document digest
- ea9a743a08e4c4b747cd873bb82cc23f1e540752798de57770578a39688385c9
05 Affected products
VendorProductVersionsPlatforms
LinuxLinuxb9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < c7f75d11fe72913d2619f97b2334b083cd7bb955, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < dc1b438a35773d030be0ee80d9c635c3e558a322, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < 16d8c44be52e3650917736d45f5904384a9da834, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < 55fcdd1258faaecca74b91b88cc0921f9edd775d, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < 9dc373f74097edd0e35f3393d6248eda8d1ba99d, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < 8c06f34785068b87e2b560534c77c163d6c6dca7, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < e407495ba6788a67d1bd41714158c079e340879b, b9b17debc69d27cd55e21ee51a5ba7fc50a426cf to < 6d72e7c767acbbdd44ebc7d89c6690b405b32b57, 4.9—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955
- git.kernel.orghttps://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322
- git.kernel.orghttps://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834
- git.kernel.orghttps://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d
- git.kernel.orghttps://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d
- git.kernel.orghttps://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7
- git.kernel.orghttps://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b
- git.kernel.orghttps://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-553.5.1.el8_10
- kernel Fixed in 4.18.0-553.5.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.5.1.el8_10
- kernel-core Fixed in 4.18.0-553.5.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.5.1.el8_10
- kernel-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-doc Fixed in 4.18.0-553.5.1.el8_10
- kernel-headers Fixed in 4.18.0-553.5.1.el8_10
- kernel-modules Fixed in 4.18.0-553.5.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.5.1.el8_10
- kernel-rt Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-core Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-kvm Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-kvm Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-tools Fixed in 4.18.0-553.5.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.5.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.5.1.el8_10
- perf Fixed in 4.18.0-553.5.1.el8_10
- python3-perf Fixed in 4.18.0-553.5.1.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 4.18.0-553.5.1.el8_10
- kernel Fixed in 4.18.0-553.5.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.5.1.el8_10
- kernel-core Fixed in 4.18.0-553.5.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.5.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.5.1.el8_10
- kernel-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-doc Fixed in 4.18.0-553.5.1.el8_10
- kernel-headers Fixed in 4.18.0-553.5.1.el8_10
- kernel-modules Fixed in 4.18.0-553.5.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.5.1.el8_10
- kernel-rt Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-core Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-kvm Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-kvm Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.5.1.rt7.346.el8_10
- kernel-tools Fixed in 4.18.0-553.5.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.5.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.5.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.5.1.el8_10
- perf Fixed in 4.18.0-553.5.1.el8_10
- python3-perf Fixed in 4.18.0-553.5.1.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 Fixed in 4.15.0-151.157
- linux-aws Fixed in 4.15.0-1109.116
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1051.53~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1121.134
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1051.53~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1106.120
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1046.49~18.04.1
- 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 5.4.0-77.86~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1097.99
- linux-oem No fix yet
- linux-oracle Fixed in 4.15.0-1078.86
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1048.52~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1038.41~18.04.1
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 5.4.0-77.86
- linux-aws Fixed in 5.4.0-1051.53
- 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 5.4.0-1051.53
- 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 5.4.0-1013.16
- linux-gcp Fixed in 5.4.0-1046.49
- 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 5.4.0-1018.19
- 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 5.4.0-1041.42
- 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 5.4.0-1048.52
- 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 5.4.0-1038.41
- 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 4.15.0-1121.134~14.04.1Available 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 4.15.0-1109.116~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1121.134~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp Fixed in 4.15.0-1106.120~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe Fixed in 4.15.0-151.157~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-oracle Fixed in 4.15.0-1078.86~16.04.1Available 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 4.15.0-2051.53Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2033.37Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1066.75Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 4.15.0-2016.18Available 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 5.4.0-1028.32Available 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.