Attacker Value
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User Interaction
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Privileges Required
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0

CVE-2024-26749

Disclosure Date: April 03, 2024 •
CVE-2024-26749
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Description

In the Linux kernel, the following vulnerability has been resolved:

usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()

…
cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request);
list_del_init(&priv_req->list);
…

‘priv_req’ actually free at cdns3_gadget_ep_free_request(). But
list_del_init() use priv_req->list after it.

[ 1542.642868][ T534] BUG: KFENCE: use-after-free read in __list_del_entry_valid+0x10/0xd4
[ 1542.642868][ T534]
[ 1542.653162][ T534] Use-after-free read at 0x000000009ed0ba99 (in kfence-#3):
[ 1542.660311][ T534] __list_del_entry_valid+0x10/0xd4
[ 1542.665375][ T534] cdns3_gadget_ep_disable+0x1f8/0x388 [cdns3]
[ 1542.671571][ T534] usb_ep_disable+0x44/0xe4
[ 1542.675948][ T534] ffs_func_eps_disable+0x64/0xc8
[ 1542.680839][ T534] ffs_func_set_alt+0x74/0x368
[ 1542.685478][ T534] ffs_func_disable+0x18/0x28

Move list_del_init() before cdns3_gadget_ep_free_request() to resolve this
problem.

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CVSS V3 Severity and Metrics
Base Score:
None
Impact Score:
Unknown
Exploitability Score:
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Vector:
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Attack Vector (AV):
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Attack Complexity (AC):
Unknown
Privileges Required (PR):
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User Interaction (UI):
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Confidentiality (C):
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Integrity (I):
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Availability (A):
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General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Linux cfa9abb5570c
Linux not down converted
Prerequisites
Unknown
Discovered By
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PoC Author
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Metasploit Module
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Reporter
Unknown

Vendors

  • Linux

Products

  • Linux
Technical Analysis