can: bcm: Fix UAF in bcm_proc_show()
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 41 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.25 and later | 4.14.322, 4.19.291, 5.4.251, 5.10.188, 5.15.123, 6.1.42, 6.4.7, 6.5 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.25 and later Fixed in 4.14.322, 4.19.291, 5.4.251, 5.10.188, 5.15.123, 6.1.42, 6.4.7, 6.5 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.25 to before 4.14.322; 4.15 to before 4.19.291; 4.20 to before 5.4.251; 5.5 to before 5.10.188; 5.11 to before 5.15.123; 5.16 to before 6.1.42; 6.2 to before 6.4.7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | 6.5 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* | 6.5 rc2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.25 to before 4.14.322; 4.15 to before 4.19.291; 4.20 to before 5.4.251; 5.5 to before 5.10.188; 5.11 to before 5.15.123; 5.16 to before 6.1.42; 6.2 to before 6.4.7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* Versions 6.5 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* Versions 6.5 rc2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.322, 4.19.291, 5.4.251, 5.10.188, 5.15.123, 6.1.42, 6.4.7, 6.5
Red Hat 25 advisories
- RHSA-2025:3112 Released 2025-03-24 · Red Hat rating Importantkpatch-patch-5_14_0-70_112_1, kpatch-patch-5_14_0-70_121_1, kpatch-patch-5_14_0-70_124_1, and kpatch-patch-5_14_0-70_85_1 security update
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) kpatch-patch-5_14_0-70_112_1-1-4.el9_0, kpatch-patch-5_14_0-70_121_1-1-3.el9_0, kpatch-patch-5_14_0-70_124_1-1-1.el9_0 +1
- RHSA-2025:3094 Released 2025-03-20 · Red Hat rating Importantkpatch-patch-4_18_0-477_43_1, kpatch-patch-4_18_0-477_67_1, kpatch-patch-4_18_0-477_81_1, and kpatch-patch-4_18_0-477_89_1 security update
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) kpatch-patch-4_18_0-477_43_1-1-8.el8_8, kpatch-patch-4_18_0-477_67_1-1-5.el8_8, kpatch-patch-4_18_0-477_81_1-1-3.el8_8 +1
- RHSA-2025:3097 Released 2025-03-20 · Red Hat rating Importantkpatch-patch-5_14_0-427_13_1, kpatch-patch-5_14_0-427_31_1, kpatch-patch-5_14_0-427_44_1, and kpatch-patch-5_14_0-427_55_1 security update
- Red Hat Enterprise Linux BaseOS EUS (v.9.4) kpatch-patch-5_14_0-427_13_1-1-7.el9_4, kpatch-patch-5_14_0-427_31_1-1-5.el9_4, kpatch-patch-5_14_0-427_44_1-1-3.el9_4 +1
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- Red Hat Enterprise Linux BaseOS EUS (v.9.2) kpatch-patch-5_14_0-284_104_1-1-1.el9_2, kpatch-patch-5_14_0-284_52_1-1-9.el9_2, kpatch-patch-5_14_0-284_79_1-1-5.el9_2 +1
- RHSA-2025:3095 Released 2025-03-20 · Red Hat rating Importantkpatch-patch-4_18_0-372_118_1, kpatch-patch-4_18_0-372_131_1, kpatch-patch-4_18_0-372_137_1, and kpatch-patch-4_18_0-372_91_1 security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.6) kpatch-patch-4_18_0-372_118_1-1-5.el8_6, kpatch-patch-4_18_0-372_131_1-1-4.el8_6, kpatch-patch-4_18_0-372_137_1-1-1.el8_6 +1
- RHSA-2025:3093 Released 2025-03-20 · Red Hat rating Importantkpatch-patch-4_18_0-305_120_1, kpatch-patch-4_18_0-305_138_1, kpatch-patch-4_18_0-305_145_1, and kpatch-patch-4_18_0-305_150_1 security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.4) kpatch-patch-4_18_0-305_120_1-1-9.el8_4, kpatch-patch-4_18_0-305_138_1-1-5.el8_4, kpatch-patch-4_18_0-305_145_1-1-3.el8_4 +1
- RHSA-2025:3049 Released 2025-03-20 · Red Hat rating Importantkpatch-patch-4_18_0-553, kpatch-patch-4_18_0-553_16_1, kpatch-patch-4_18_0-553_30_1, and kpatch-patch-4_18_0-553_40_1 security update
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- RHSA-2025:3024 Released 2025-03-19 · Red Hat rating Importantkernel-rt security update
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- RHSA-2025:2646 Released 2025-03-11 · Red Hat rating Importantkernel security update
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- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-503.31.1.el9_5, kernel-rt-core-5.14.0-503.31.1.el9_5, kernel-rt-debug-5.14.0-503.31.1.el9_5 +9
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- Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) python-perf-2.6.32-754.56.1.el6
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- Red Hat Enterprise Linux Server Optional AUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.93.1.el7
- RHSA-2025:2512 Released 2025-03-10 · Red Hat rating Importantkernel-rt security update
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- Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.125.1.rt21.197.el9_0, kernel-rt-core-5.14.0-70.125.1.rt21.197.el9_0, kernel-rt-debug-5.14.0-70.125.1.rt21.197.el9_0 +7
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- RHSA-2025:2501 Released 2025-03-10 · Red Hat rating Importantkernel security update
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- RHSA-2025:2490 Released 2025-03-10 · Red Hat rating Importantkernel security update
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- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.59.1.el9_4, kernel-rt-core-5.14.0-427.59.1.el9_4, kernel-rt-debug-5.14.0-427.59.1.el9_4 +11
- RHSA-2025:2489 Released 2025-03-10 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.141.1.el8_6, kernel-4.18.0-372.141.1.el8_6, kernel-abi-stablelists-4.18.0-372.141.1.el8_6 +14
- Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.141.1.el8_6, kernel-4.18.0-372.141.1.el8_6, kernel-abi-stablelists-4.18.0-372.141.1.el8_6 +19
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Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2025:2627 |
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2025:2525 |
| Red Hat CodeReady Linux Builder EUS (v.9.2) | Fixed | RHSA-2025:3025 |
| Red Hat CodeReady Linux Builder EUS (v.9.4) | Fixed | RHSA-2025:2490 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:2627 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:2488 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2025:3025 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:2490 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2025:3026, RHSA-2025:3049 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2025:2627, RHSA-2025:3048 |
| Red Hat Enterprise Linux BaseOS AUS (v. 8.2) | Fixed | RHSA-2025:2646 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2025:2528 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2025:2489 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.4) | Fixed | RHSA-2025:2528, RHSA-2025:3093 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.6) | Fixed | RHSA-2025:2489, RHSA-2025:3095 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:2488, RHSA-2025:3112 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2025:2525, RHSA-2025:3094 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2025:3025, RHSA-2025:3096 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | RHSA-2025:2490, RHSA-2025:3097 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.4) | Fixed | RHSA-2025:2528 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.6) | Fixed | RHSA-2025:2489 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2025:3026 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2025:3027 |
| Red Hat Enterprise Linux NFV E4S (v.9.0) | Fixed | RHSA-2025:2512 |
| Red Hat Enterprise Linux NFV TUS (v.8.4) | Fixed | RHSA-2025:2524 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2025:3027 |
| Red Hat Enterprise Linux RT TUS (v.8.4) | Fixed | RHSA-2025:2524 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2025:2627 |
| Red Hat Enterprise Linux Real Time E4S (v.9.0) | Fixed | RHSA-2025:2512 |
| Red Hat Enterprise Linux Real Time EUS (v.9.2) | Fixed | RHSA-2025:3024 |
| Red Hat Enterprise Linux Real Time EUS (v.9.4) | Fixed | RHSA-2025:2490 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2025:2627 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) | Fixed | RHSA-2025:3024 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) | Fixed | RHSA-2025:2490 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2025:2501 |
| Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) | Fixed | RHSA-2025:2517 |
| Red Hat Enterprise Linux Server AUS (v. 7.7) | Fixed | RHSA-2025:2514 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2025:2501 |
| Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) | Fixed | RHSA-2025:2517 |
| Red Hat Enterprise Linux Server Optional AUS (v. 7.7) | Fixed | RHSA-2025:2514 |
| Red Hat Enterprise Linux for Real Time (v. 7 ELS) | Fixed | RHSA-2025:2510 |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2023-52922
- 2026-10-03 Alias added: GHSA-56gp-6mw9-wpfj
References
Patch 8
- https://git.kernel.org/stable/c/11b8e27ed448baa385d90154a141466bd5e92f18
- https://git.kernel.org/stable/c/9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff
- https://git.kernel.org/stable/c/9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6
- https://git.kernel.org/stable/c/cf254b4f68e480e73dab055014e002b77aed30ed
- https://git.kernel.org/stable/c/3c3941bb1eb53abe7d640ffee5c4d6b559829ab3
- https://git.kernel.org/stable/c/995f47d76647708ec26c6e388663ad4f3f264787
- https://git.kernel.org/stable/c/dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7
- https://git.kernel.org/stable/c/55c3b96074f3f9b0aee19bf93cd71af7516582bb
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2023-52922 · CVE Program
- CVE-2023-52922 · NVD
- FIRST EPSS
- GHSA-56gp-6mw9-wpfj · GitHub Advisory Database · CC BY 4.0
- CVE-2023-52922 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences