CVE-2022-49026 Information

Description

In the Linux kernel the following vulnerability has been resolved:

e100: Fix possible use after free in e100_xmit_prepare

In e100_xmit_prepare() if we can’t map the skb then return -ENOMEM so e100_xmit_frame() will return NETDEV_TX_BUSY and the upper layer will resend the skb. But the skb is already freed which will cause UAF bug when the upper layer resends the skb.

Remove the harmful free.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://git.kernel.org/stable/c/b775f37d943966f6f77dca402f5a9dedce502c25 https://git.kernel.org/stable/c/9fc27d22cdb9b1fcd754599d216a8992fed280cd https://git.kernel.org/stable/c/b46f6144ab89d3d757ead940759c505091626a7d https://git.kernel.org/stable/c/45605c75c52c7ae7bfe902214343aabcfe5ba0ff

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8