CVE-2021-47236

Advisory lineage Upstream: 0 Downstream: 11
Analyzed
Published: 21 May 2024, 14:19
Last modified:11 May 2026, 13:50

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2024, 14:19
Published
Vulnerability first disclosed
11 May 2026, 13:50
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 0%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < f12554b0ff639e74612cc01b3b4a049e098d2d65 | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < 14184ec5c958b589ba934da7363a2877879204df | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < 1bcacd6088d61c0ac6a990d87975600a81f3247e | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < f4e6a7f19c82f39b1803e91c54718f0d7143767d | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < 81de2ed06df8b5451e050fe6a318af3263dbff3f | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < 05b2b9f7d24b5663d9b47427fe1555bdafd3ea02 | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88 | ≥ 9f722c0978b04acba209f8ca1896ad05814bc3a3, < c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7 | 2.6.30

  • linux•linux_kernel

    ≥ 2.6.30, < 4.4.274 | ≥ 4.5, < 4.9.274 | ≥ 4.10, < 4.14.238 | ≥ 4.15, < 4.19.196 | ≥ 4.20, < 5.4.128 | ≥ 5.5, < 5.10.46 | ≥ 5.11, < 5.12.13 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3 | 5.13:rc4 | 5.13:rc5 | 5.13:rc6

References (8)