CVE-2021-47236
net: cdc_eem: fix tx fixup skb leak
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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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02
- https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204df
- https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247e
- https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3f
- https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88
References (8)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Quick Info
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