CVE-2023-52922

HIGH EPSS 20.3%

Published Nov 28, 20241y ago · Modified Jun 17, 20261w ago

7.8 CVSS 3.1

High

Published Nov 28, 2024 1y ago

Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: can: bcm: Fix UAF in bcm_proc_show() BUG: KASAN: slab-use-after-free in bcm_proc_show+0x969/0xa80 Read of size 8 at addr ffff888155846230 by task cat/7862 CPU: 1 PID: 7862 Comm: cat Not tainted 6.5.0-rc1-00153-gc8746099c197 #230 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0xd5/0x150 print_report+0xc1/0x5e0 kasan_report+0xba/0xf0 bcm_proc_show+0x969/0xa80 seq_read_iter+0x4f6/0x1260 seq_read+0x165/0x210 proc_reg_read+0x227/0x300 vfs_read+0x1d5/0x8d0 ksys_read+0x11e/0x240 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Allocated by task 7846: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x9e/0xa0 bcm_sendmsg+0x264b/0x44e0 sock_sendmsg+0xda/0x180 ____sys_sendmsg+0x735/0x920 ___sys_sendmsg+0x11d/0x1b0 __sys_sendmsg+0xfa/0x1d0 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 7846: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x27/0x40 ____kasan_slab_free+0x161/0x1c0 slab_free_freelist_hook+0x119/0x220 __kmem_cache_free+0xb4/0x2e0 rcu_core+0x809/0x1bd0 bcm_op is freed before procfs entry be removed in bcm_release(), this lead to bcm_proc_show() may read the freed bcm_op.

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

20.3% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 9

Vendor	Product	Version	Range
linux	linux_kernel	*	≥2.6.25 – <4.14.322
linux	linux_kernel	*	≥4.15 – <4.19.291
linux	linux_kernel	*	≥4.20 – <5.4.251
linux	linux_kernel	*	≥5.5 – <5.10.188
linux	linux_kernel	*	≥5.11 – <5.15.123
linux	linux_kernel	*	≥5.16 – <6.1.42
linux	linux_kernel	*	≥6.2 – <6.4.7
linux	linux_kernel	6.5	any
linux	linux_kernel	6.5	any

References 9

allelesecurity.com https://allelesecurity.com/use-after-free-vulnerability-in-can-bcm-subsystem-leading-to-information-disclosure-cve-2023-52922/
git.kernel.org https://git.kernel.org/stable/c/11b8e27ed448baa385d90154a141466bd5e92f18

Patch
git.kernel.org https://git.kernel.org/stable/c/3c3941bb1eb53abe7d640ffee5c4d6b559829ab3

Patch
git.kernel.org https://git.kernel.org/stable/c/55c3b96074f3f9b0aee19bf93cd71af7516582bb

Patch
git.kernel.org https://git.kernel.org/stable/c/9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6

Patch
git.kernel.org https://git.kernel.org/stable/c/995f47d76647708ec26c6e388663ad4f3f264787

Patch
git.kernel.org https://git.kernel.org/stable/c/9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff

Patch
git.kernel.org https://git.kernel.org/stable/c/cf254b4f68e480e73dab055014e002b77aed30ed

Patch
git.kernel.org https://git.kernel.org/stable/c/dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7

Patch

Remediation

git.kernel.org https://git.kernel.org/stable/c/11b8e27ed448baa385d90154a141466bd5e92f18

Patch
git.kernel.org https://git.kernel.org/stable/c/3c3941bb1eb53abe7d640ffee5c4d6b559829ab3

Patch
git.kernel.org https://git.kernel.org/stable/c/55c3b96074f3f9b0aee19bf93cd71af7516582bb

Patch
git.kernel.org https://git.kernel.org/stable/c/9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6

Patch
git.kernel.org https://git.kernel.org/stable/c/995f47d76647708ec26c6e388663ad4f3f264787

Patch
git.kernel.org https://git.kernel.org/stable/c/9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff

Patch
git.kernel.org https://git.kernel.org/stable/c/cf254b4f68e480e73dab055014e002b77aed30ed

Patch
git.kernel.org https://git.kernel.org/stable/c/dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7

Patch