CVE-2024-46740
Severity CVSS v4.0:
Pending analysis
Type:
CWE-416
Use After Free
Publication date:
18/09/2024
Last modified:
18/02/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
binder: fix UAF caused by offsets overwrite<br />
<br />
Binder objects are processed and copied individually into the target<br />
buffer during transactions. Any raw data in-between these objects is<br />
copied as well. However, this raw data copy lacks an out-of-bounds<br />
check. If the raw data exceeds the data section size then the copy<br />
overwrites the offsets section. This eventually triggers an error that<br />
attempts to unwind the processed objects. However, at this point the<br />
offsets used to index these objects are now corrupted.<br />
<br />
Unwinding with corrupted offsets can result in decrements of arbitrary<br />
nodes and lead to their premature release. Other users of such nodes are<br />
left with a dangling pointer triggering a use-after-free. This issue is<br />
made evident by the following KASAN report (trimmed):<br />
<br />
==================================================================<br />
BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c<br />
Write of size 4 at addr ffff47fc91598f04 by task binder-util/743<br />
<br />
CPU: 9 UID: 0 PID: 743 Comm: binder-util Not tainted 6.11.0-rc4 #1<br />
Hardware name: linux,dummy-virt (DT)<br />
Call trace:<br />
_raw_spin_lock+0xe4/0x19c<br />
binder_free_buf+0x128/0x434<br />
binder_thread_write+0x8a4/0x3260<br />
binder_ioctl+0x18f0/0x258c<br />
[...]<br />
<br />
Allocated by task 743:<br />
__kmalloc_cache_noprof+0x110/0x270<br />
binder_new_node+0x50/0x700<br />
binder_transaction+0x413c/0x6da8<br />
binder_thread_write+0x978/0x3260<br />
binder_ioctl+0x18f0/0x258c<br />
[...]<br />
<br />
Freed by task 745:<br />
kfree+0xbc/0x208<br />
binder_thread_read+0x1c5c/0x37d4<br />
binder_ioctl+0x16d8/0x258c<br />
[...]<br />
==================================================================<br />
<br />
To avoid this issue, let&#39;s check that the raw data copy is within the<br />
boundaries of the data section.
Impact
Base Score 3.x
7.80
Severity 3.x
HIGH
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.4.226 (including) | 5.4.284 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.10.157 (including) | 5.10.226 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15.17 (including) | 5.15.167 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.17 (including) | 6.1.110 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.2 (including) | 6.6.51 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.7 (including) | 6.10.10 (excluding) |
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/109e845c1184c9f786d41516348ba3efd9112792
- https://git.kernel.org/stable/c/1f33d9f1d9ac3f0129f8508925000900c2fe5bb0
- https://git.kernel.org/stable/c/3a8154bb4ab4a01390a3abf1e6afac296e037da4
- https://git.kernel.org/stable/c/4df153652cc46545722879415937582028c18af5
- https://git.kernel.org/stable/c/4f79e0b80dc69bd5eaaed70f0df1b558728b4e59
- https://git.kernel.org/stable/c/5a32bfd23022ffa7e152f273fa3fa29befb7d929
- https://git.kernel.org/stable/c/eef79854a04feac5b861f94d7b19cbbe79874117