CVE-2021-47236
net: cdc_eem: fix tx fixup skb leak
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.30
References 8
git.kernel.org
- stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65
- stable/c/14184ec5c958b589ba934da7363a2877879204df
- stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247e
- stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767d
- stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3f
- stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02
- stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88
- stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7