CVE-2024-49982 Information

Description

In the Linux kernel the following vulnerability has been resolved:

aoe: fix the potential use-after-free problem in more places

For fixing CVE-2023-6270 f98364e92662 (oe: fix the potential use-after-free problem in aoecmd_cfg_pkts) makes tx() calling dev_put() instead of doing in aoecmd_cfg_pkts(). It avoids that the tx() runs into use-after-free.

Then Nicolai Stange found more places in aoe have potential use-after-free problem with tx(). e.g. revalidate() aoecmd_ata_rw() resend() probe() and aoecmd_cfg_rsp(). Those functions also use aoenet_xmit() to push packet to tx queue. So they should also use dev_hold() to increase the refcnt of skb->dev.

On the other hand moving dev_put() to tx() causes that the refcnt of skb->dev be reduced to a negative value because corresponding dev_hold() are not called in revalidate() aoecmd_ata_rw() resend() probe() and aoecmd_cfg_rsp(). This patch fixed this issue.

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/f63461af2c1a86af4217910e47a5c46e3372e645 https://git.kernel.org/stable/c/07b418d50ccbbca7e5d87a3a0d41d436cefebf79 https://git.kernel.org/stable/c/bc2cbf7525ac288e07d465f5a1d8cb8fb9599254 https://git.kernel.org/stable/c/acc5103a0a8c200a52af7d732c36a8477436a3d3 https://git.kernel.org/stable/c/89d9a69ae0c667e4d9d028028e2dcc837bae626f https://git.kernel.org/stable/c/8253a60c89ec35c8f36fb2cc08cdf854c7a3eb58 https://git.kernel.org/stable/c/6d6e54fc71ad1ab0a87047fd9c211e75d86084a3

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