CVE-2024-46740

HIGH EPSS 20.6%
Published Sep 18, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 18, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: binder: fix UAF caused by offsets overwrite Binder objects are processed and copied individually into the target buffer during transactions. Any raw data in-between these objects is copied as well. However, this raw data copy lacks an out-of-bounds check. If the raw data exceeds the data section size then the copy overwrites the offsets section. This eventually triggers an error that attempts to unwind the processed objects. However, at this point the offsets used to index these objects are now corrupted. Unwinding with corrupted offsets can result in decrements of arbitrary nodes and lead to their premature release. Other users of such nodes are left with a dangling pointer triggering a use-after-free. This issue is made evident by the following KASAN report (trimmed): ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c Write of size 4 at addr ffff47fc91598f04 by task binder-util/743 CPU: 9 UID: 0 PID: 743 Comm: binder-util Not tainted 6.11.0-rc4 #1 Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x19c binder_free_buf+0x128/0x434 binder_thread_write+0x8a4/0x3260 binder_ioctl+0x18f0/0x258c [...] Allocated by task 743: __kmalloc_cache_noprof+0x110/0x270 binder_new_node+0x50/0x700 binder_transaction+0x413c/0x6da8 binder_thread_write+0x978/0x3260 binder_ioctl+0x18f0/0x258c [...] Freed by task 745: kfree+0xbc/0x208 binder_thread_read+0x1c5c/0x37d4 binder_ioctl+0x16d8/0x258c [...] ================================================================== To avoid this issue, let's check that the raw data copy is within the boundaries of the data section.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
20.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥5.4.226  –  <5.4.284
linuxlinux_kernel*≥5.10.157  –  <5.10.226
linuxlinux_kernel*≥5.15.17  –  <5.15.167
linuxlinux_kernel*≥5.17  –  <6.1.110
linuxlinux_kernel*≥6.2  –  <6.6.51
linuxlinux_kernel*≥6.7  –  <6.10.10
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any

References 9

  • git.kernel.org https://git.kernel.org/stable/c/109e845c1184c9f786d41516348ba3efd9112792
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1f33d9f1d9ac3f0129f8508925000900c2fe5bb0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3a8154bb4ab4a01390a3abf1e6afac296e037da4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4df153652cc46545722879415937582028c18af5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4f79e0b80dc69bd5eaaed70f0df1b558728b4e59
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a32bfd23022ffa7e152f273fa3fa29befb7d929
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eef79854a04feac5b861f94d7b19cbbe79874117
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/109e845c1184c9f786d41516348ba3efd9112792
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1f33d9f1d9ac3f0129f8508925000900c2fe5bb0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3a8154bb4ab4a01390a3abf1e6afac296e037da4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4df153652cc46545722879415937582028c18af5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4f79e0b80dc69bd5eaaed70f0df1b558728b4e59
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a32bfd23022ffa7e152f273fa3fa29befb7d929
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eef79854a04feac5b861f94d7b19cbbe79874117
    Patch