Description
In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).
If some error happens in emac_tx_fill_tpd(), the skb will be freed via
dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().
But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).
As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,
thus my patch assigns skb->len to 'len' before the possible free and
use 'len' instead of skb->len later.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 4.9 | 4.9.269 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.10.38-1 | — |
| Debian 13 | linux | 5.10.38-1 | — |
| Debian 12 | linux | 5.10.38-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +22 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-77.86 | — |
| Ubuntu 20.04 LTS | linux-aws +1 | 5.4.0-1051.53 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1013.16 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1046.49 | — |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1018.19 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1041.42 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1048.52 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1038.41 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-151.157 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1109.116 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 +1 | 5.4.0-1051.53~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1121.134 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1106.120 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1046.49~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-77.86~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1097.99 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1078.86 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1048.52~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1038.41~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1028.32 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2051.53 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2033.37 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1066.75 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2016.18 | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1109.116~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1121.134~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1106.120~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-151.157~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1078.86~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1121.134~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-553.5.1.rt7.346.el8_10 | RHSA-2024:3627 |
| RHEL 8 | perf +26 | 4.18.0-553.5.1.el8_10 | RHSA-2024:3618 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.105.1.el8_6 | RHSA-2024:3462 |
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.58.1.el8_8 | RHSA-2024:3810 |
| RHEL 8.6 EUS | perf +26 | 4.18.0-372.105.1.el8_6 | RHSA-2024:3462 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-rt +11 | 4.18.0-553.5.1.rt7.346.el8_10 | ALSA-2024:3627 |
| AlmaLinux 8 | perf +24 | 4.18.0-553.5.1.el8_10 | ALSA-2024:3618 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-553.5.1.el8_10 | RLSA-2024:3618 |
| Rocky Linux 8 | kernel-rt | 4.18.0-553.5.1.rt7.346.el8_10 | RLSA-2024:3627 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +6 | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.153.2.150300.18.90.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLES 15 SP3 | kernel-syms | 5.3.18-150300.59.153.1 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-150200.24.183.1.150200.9.93.2 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.183.1 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.173.1 | SUSE-SU-2024:0975-1 |
| SLES 12 SP5 | kernel-docs +3 | 4.12.14-122.201.1 | SUSE-SU-2024:0925-1 |
| SLES 12 SP5 | kernel-obs-build | 4.12.14-122.201.2 | SUSE-SU-2024:0925-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | kernel-default-base | 5.3.18-150300.59.153.2.150300.18.90.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLES for SAP 15 SP3 | kernel-docs +4 | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLES for SAP 15 SP3 | kernel-syms | 5.3.18-150300.59.153.1 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLES for SAP 15 SP2 | kernel-default-base | 5.3.18-150200.24.183.1.150200.9.93.2 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SLES for SAP 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.183.1 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.173.1 | SUSE-SU-2024:0975-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.201.1 | SUSE-SU-2024:0925-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.171.1 | SUSE-SU-2024:0976-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.153.2.150300.18.90.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE Micro 5.2 | kernel-rt +1 | 5.3.18-150300.161.1 | SUSE-SU-2024:0856-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.153.2.150300.18.90.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE Micro 5.1 | kernel-rt +1 | 5.3.18-150300.161.1 | SUSE-SU-2024:0856-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_42 | 1-150300.7.3.2 | SUSE-SU-2024:0857-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_43 | 1-150300.7.3.5 | SUSE-SU-2024:1489-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.183.1 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_46 | 1-150200.5.3.2 | SUSE-SU-2024:0926-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_47 | 1-150200.5.3.3 | SUSE-SU-2024:1454-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.201.1 | SUSE-SU-2024:0925-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_54 | 1-8.7.1 | SUSE-SU-2024:0925-1 |
| SLE HPC 15 SP3 | kernel-64kb +5 | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE HPC 15 SP3 | kernel-default-base | 5.3.18-150300.59.153.2.150300.18.90.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE HPC 15 SP3 | kernel-syms | 5.3.18-150300.59.153.1 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SLE HPC 15 SP2 | kernel-default-base | 5.3.18-150200.24.183.1.150200.9.93.2 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SLE HPC 15 SP2 | kernel-docs +5 | 5.3.18-150200.24.183.1 | SUSE-SU-2024:1454-1, SUSE-SU-2024:0926-1 |
| SUSE Enterprise Storage 7.1 | kernel-64kb +5 | 5.3.18-150300.59.153.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SUSE Enterprise Storage 7.1 | kernel-default-base | 5.3.18-150300.59.153.2.150300.18.90.2 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
| SUSE Enterprise Storage 7.1 | kernel-syms | 5.3.18-150300.59.153.1 | SUSE-SU-2024:1489-1, SUSE-SU-2024:0857-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.238-182.421 | 1.0-0.amzn2 | ALAS2-2021-1685 |
| Amazon Linux 2 | perf +8 | 4.14.238-182.421.amzn2 | ALAS2-2021-1685 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-553.5.1.el8_10 | ELSA-2024-3618 |
Advisories 19
- ALSA-2024:3627 Moderate: kernel-rt security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3618 Moderate: kernel update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:3810 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2024:3618 Red Hat Security Advisory: kernel update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3462 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2024:3627 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Sep 27, 2026
- RLSA-2024:3627 Moderate: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:3618 Moderate: kernel update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:1489-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0926-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0975-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0976-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1454-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0925-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0499 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 12, 2025
- ALAS2-2021-1685 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2025
- SUSE-SU-2024:0857-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2024:0856-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2024-3618 Moderate: kernel update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 5, 2024
References
- https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955
- https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322
- https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834
- https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d
- https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d
- https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7
- https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b
- https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57