7.8

CVE-2023-52922: can: bcm: Fix UAF in bcm_proc_show()

Modified
AliasesRHSA-2025:3024RHSA-2025:3025RHSA-2025:3026
Published 28-11-2024Last modified 05-08-2026

Vulnerability summary

CVE-2023-52922 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 27 · Related 14
RHSA-2025:2488RHSA-2025:2489RHSA-2025:2490RHSA-2025:2501RHSA-2025:2510RHSA-2025:2512

Timeline

  1. 28-11-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu116 products
  • linuxAll versions (No fix recorded) | < 5.4.0-166.183 | < 5.15.0-88.98
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1113.123 | < 5.15.0-1049.54
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Redhat81 products
  • bpftool< 0:7.0.0-284.109.1.el9_2 | < 0:4.18.0-553.45.1.el8_10
  • bpftool-debuginfo< 0:7.0.0-284.109.1.el9_2 | < 0:4.18.0-553.45.1.el8_10
  • kernel< 0:5.14.0-284.109.1.el9_2 | < 0:4.18.0-553.45.1.el8_10
  • kernel-64k< 0:5.14.0-284.109.1.el9_2
  • kernel-64k-core< 0:5.14.0-284.109.1.el9_2
Linux2 products
  • linux≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < 11b8e27ed448baa385d90154a141466bd5e92f18 | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < 9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < 9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6 | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < cf254b4f68e480e73dab055014e002b77aed30ed | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < 3c3941bb1eb53abe7d640ffee5c4d6b559829ab3 | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < 995f47d76647708ec26c6e388663ad4f3f264787 | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7 | ≥ ffd980f976e7fd666c2e61bf8ab35107efd11828, < 55c3b96074f3f9b0aee19bf93cd71af7516582bb | 2.6.25
  • linux_kernel≥ 2.6.25, < 4.14.322 | ≥ 4.15, < 4.19.291 | ≥ 4.20, < 5.4.251 | ≥ 5.5, < 5.10.188 | ≥ 5.11, < 5.15.123 | ≥ 5.16, < 6.1.42 | ≥ 6.2, < 6.4.7 | 6.5:rc1 | 6.5:rc2
Debian1 product
  • linux< 6.1.52-1 | < 6.4.11-1

4 vendors · 200 products · Showing 200 of 285

References

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