CVE-2023-52922can: bcm: Fix UAF in bcm_proc_show()
- 7.8HighCVSS base score
- 0.30%Exploitation in 30 daysEPSS · top 77% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 21 months later
· 21 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 77% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 11b8e27ed448baa385d90154a141466bd5e92f18
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < cf254b4f68e480e73dab055014e002b77aed30ed
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 3c3941bb1eb53abe7d640ffee5c4d6b559829ab3
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 995f47d76647708ec26c6e388663ad4f3f264787
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7
- affected ffd980f976e7fd666c2e61bf8ab35107efd11828 – < 55c3b96074f3f9b0aee19bf93cd71af7516582bb
- affected 2.6.25
- unaffected < 2.6.25
- unaffected 4.14.322 – ≤ 4.14.*
- unaffected 4.19.291 – ≤ 4.19.*
- unaffected 5.4.251 – ≤ 5.4.*
- unaffected 5.10.188 – ≤ 5.10.*
- unaffected 5.15.123 – ≤ 5.15.*
- unaffected 6.1.42 – ≤ 6.1.*
- unaffected 6.4.7 – ≤ 6.4.*
- unaffected 6.5 – ≤ *
References
References9
- https://git.kernel.org/stable/c/11b8e27ed448baa385d90154a141466bd5e92f18 (opens in a new tab)
- https://git.kernel.org/stable/c/9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff (opens in a new tab)
- https://git.kernel.org/stable/c/9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6 (opens in a new tab)
- https://git.kernel.org/stable/c/cf254b4f68e480e73dab055014e002b77aed30ed (opens in a new tab)
- https://git.kernel.org/stable/c/3c3941bb1eb53abe7d640ffee5c4d6b559829ab3 (opens in a new tab)
- https://git.kernel.org/stable/c/995f47d76647708ec26c6e388663ad4f3f264787 (opens in a new tab)
- https://git.kernel.org/stable/c/dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7 (opens in a new tab)
- https://git.kernel.org/stable/c/55c3b96074f3f9b0aee19bf93cd71af7516582bb (opens in a new tab)
- https://allelesecurity.com/use-after-free-vulnerability-in-can-bcm-subsystem-leading-to-information-disclosure-cve-2023-52922/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-59649 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-52922)Record last updated .