Vulnerability · Published May 21, 2024 · Assigned by Linux
CVE-2021-47236net: cdc_eem: fix tx fixup skb leak
Medium 5.5
In plain English
A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: net: cdc_eem: fix tx fixup skb leak when usbnet transmit a skb, eem fixup it in eem_tx_fixup(), if skb_copy_expand() failed, it return NULL, usbnet_start_xmit() will have no chance to free original skb. fix it by free orginal skb in eem_tx_fixup() first, then check skb clone status, if failed, return NULL to usbnet.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-core | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-debug | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-devel | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-doc | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-headers | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-modules | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-rt | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-debug-kvm | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-kvm | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-553.8.1.rt7.349.el8_10 | ALSA-2024:4352 |
| AlmaLinux:8 | kernel-tools | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | perf | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| AlmaLinux:8 | python3-perf | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| Debian:12 | linux | 5.10.46-1 | DEBIAN-CVE-2021-47236 |
| Debian:13 | linux | 5.10.46-1 | DEBIAN-CVE-2021-47236 |
| Debian:14 | linux | 5.10.46-1 | DEBIAN-CVE-2021-47236 |
| Rocky Linux:8 | kernel | 0:4.18.0-553.8.1.el8_10 | RLSA-2024:4211 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-553.8.1.rt7.349.el8_10 | RLSA-2024:4352 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2021-47236 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2021-47236 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 9f722c0978b04acba209f8ca1896ad05814bc3a3 – before f12554b0ff639e74612cc01b3b4a049e098d2d659f722c0978b04acba209f8ca1896ad05814bc3a3 – before 14184ec5c958b589ba934da7363a2877879204df9f722c0978b04acba209f8ca1896ad05814bc3a3 – before 1bcacd6088d61c0ac6a990d87975600a81f3247e9f722c0978b04acba209f8ca1896ad05814bc3a3 – before f4e6a7f19c82f39b1803e91c54718f0d7143767d9f722c0978b04acba209f8ca1896ad05814bc3a3 – before 81de2ed06df8b5451e050fe6a318af3263dbff3f9f722c0978b04acba209f8ca1896ad05814bc3a3 – before 05b2b9f7d24b5663d9b47427fe1555bdafd3ea029f722c0978b04acba209f8ca1896ad05814bc3a3 – before b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f889f722c0978b04acba209f8ca1896ad05814bc3a3 – before c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7 |
| Linux | Linux | 2.6.30 |
References
- https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65
- https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204df
- https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247e
- https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767d
- https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3f
- https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02
- https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88
- https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7