How severe is CVE-2023-53582?

CVE-2023-53582 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-53582 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53582?

CVE-2023-53582 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-53582?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-53582 have an EU (EUVD) identifier?

Yes. CVE-2023-53582 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32279.

When was CVE-2023-53582 published?

CVE-2023-53582 was published on 2025-10-04 and last updated on 2026-06-17.

CVE-2023-53582

CVE-2023-53582 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-32279
Weakness: CWE-476
Affected product: Linux Linux Kernel
Published: 2025-10-04
Last modified: 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: ensure CLM version is null-terminated to prevent stack-out-of-bounds Fix a stack-out-of-bounds read in brcmfmac that occurs when 'buf' that is not null-terminated is passed as an argument of strreplace() in brcmf_c_preinit_dcmds(). This buffer is filled with a CLM version string by memcpy() in brcmf_fil_iovar_data_get(). Ensure buf is null-terminated. Found by a modified version of syzkaller. [ 33.004414][ T1896] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 33.013486][ T1896] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43236/3 wl0: Nov 30 2011 17:33:42 version 5.90.188.22 [ 33.021554][ T1896] ================================================================== [ 33.022379][ T1896] BUG: KASAN: stack-out-of-bounds in strreplace+0xf2/0x110 [ 33.023122][ T1896] Read of size 1 at addr ffffc90001d6efc8 by task kworker/0:2/1896 [ 33.023852][ T1896] [ 33.024096][ T1896] CPU: 0 PID: 1896 Comm: kworker/0:2 Tainted: G O 5.14.0+ #132 [ 33.024927][ T1896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 33.026065][ T1896] Workqueue: usb_hub_wq hub_event [ 33.026581][ T1896] Call Trace: [ 33.026896][ T1896] dump_stack_lvl+0x57/0x7d [ 33.027372][ T1896] print_address_description.constprop.0.cold+0xf/0x334 [ 33.028037][ T1896] ? strreplace+0xf2/0x110 [ 33.028403][ T1896] ? strreplace+0xf2/0x110 [ 33.028807][ T1896] kasan_report.cold+0x83/0xdf [ 33.029283][ T1896] ? strreplace+0xf2/0x110 [ 33.029666][ T1896] strreplace+0xf2/0x110 [ 33.029966][ T1896] brcmf_c_preinit_dcmds+0xab1/0xc40 [ 33.030351][ T1896] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 33.030787][ T1896] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 33.031223][ T1896] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 33.031661][ T1896] ? lock_acquire+0x19d/0x4e0 [ 33.032091][ T1896] ? find_held_lock+0x2d/0x110 [ 33.032605][ T1896] ? brcmf_usb_deq+0x1a7/0x260 [ 33.033087][ T1896] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 33.033582][ T1896] brcmf_attach+0x246/0xd40 [ 33.034022][ T1896] ? wiphy_new_nm+0x1476/0x1d50 [ 33.034383][ T1896] ? kmemdup+0x30/0x40 [ 33.034722][ T1896] brcmf_usb_probe+0x12de/0x1690 [ 33.035223][ T1896] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 33.035833][ T1896] usb_probe_interface+0x25f/0x710 [ 33.036315][ T1896] really_probe+0x1be/0xa90 [ 33.036656][ T1896] __driver_probe_device+0x2ab/0x460 [ 33.037026][ T1896] ? usb_match_id.part.0+0x88/0xc0 [ 33.037383][ T1896] driver_probe_device+0x49/0x120 [ 33.037790][ T1896] __device_attach_driver+0x18a/0x250 [ 33.038300][ T1896] ? driver_allows_async_probing+0x120/0x120 [ 33.038986][ T1896] bus_for_each_drv+0x123/0x1a0 [ 33.039906][ T1896] ? bus_rescan_devices+0x20/0x20 [ 33.041412][ T1896] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 33.041861][ T1896] ? trace_hardirqs_on+0x1c/0x120 [ 33.042330][ T1896] __device_attach+0x207/0x330 [ 33.042664][ T1896] ? device_bind_driver+0xb0/0xb0 [ 33.043026][ T1896] ? kobject_uevent_env+0x230/0x12c0 [ 33.043515][ T1896] bus_probe_device+0x1a2/0x260 [ 33.043914][ T1896] device_add+0xa61/0x1ce0 [ 33.044227][ T1896] ? __mutex_unlock_slowpath+0xe7/0x660 [ 33.044891][ T1896] ? __fw_devlink_link_to_suppliers+0x550/0x550 [ 33.045531][ T1896] usb_set_configuration+0x984/0x1770 [ 33.046051][ T1896] ? kernfs_create_link+0x175/0x230 [ 33.046548][ T1896] usb_generic_driver_probe+0x69/0x90 [ 33.046931][ T1896] usb_probe_device+0x9c/0x220 [ 33.047434][ T1896] really_probe+0x1be/0xa90 [ 33.047760][ T1896] __driver_probe_device+0x2ab/0x460 [ 33.048134][ T1896] driver_probe_device+0x49/0x120 [ 33.048516][ T1896] __device_attach_driver+0x18a/0x250 [ 33.048910][ T1896] ? driver_allows_async_probing+0x120/0x120 ---truncated---

Frequently asked questions

What is CVE-2023-53582?: In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: ensure CLM version is null-terminated to prevent stack-out-of-bounds Fix a stack-out-of-bounds read in brcmfmac that occurs when 'buf' that is not null-terminated is passed as an argument of strreplace() in brcmf_c_preinit_dcmds(). This buffer is filled with a CLM version string by memcpy() in brcmf_fil_iovar_data_get(). Ensure buf is null-terminated. Found by a modified version of syzkaller. [ 33.004414][ T1896] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 33.013486][ T1896] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43236/3 wl0: Nov 30 2011 17:33:42 version 5.90.188.22 [ 33.021554][ T1896] ================================================================== [ 33.022379][ T1896] BUG: KASAN: stack-out-of-bounds in strreplace+0xf2/0x110 [ 33.023122][ T1896] Read of size 1 at addr ffffc90001d6efc8 by task kworker/0:2/1896 [ 33.023852][ T1896] [ 33.024096][ T1896] CPU: 0 PID: 1896 Comm: kworker/0:2 Tainted: G O 5.14.0+ #132 [ 33.024927][ T1896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 33.026065][ T1896] Workqueue: usb_hub_wq hub_event [ 33.026581][ T1896] Call Trace: [ 33.026896][ T1896] dump_stack_lvl+0x57/0x7d [ 33.027372][ T1896] print_address_description.constprop.0.cold+0xf/0x334 [ 33.028037][ T1896] ? strreplace+0xf2/0x110 [ 33.028403][ T1896] ? strreplace+0xf2/0x110 [ 33.028807][ T1896] kasan_report.cold+0x83/0xdf [ 33.029283][ T1896] ? strreplace+0xf2/0x110 [ 33.029666][ T1896] strreplace+0xf2/0x110 [ 33.029966][ T1896] brcmf_c_preinit_dcmds+0xab1/0xc40 [ 33.030351][ T1896] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 33.030787][ T1896] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 33.031223][ T1896] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 33.031661][ T1896] ? lock_acquire+0x19d/0x4e0 [ 33.032091][ T1896] ? find_held_lock+0x2d/0x110 [ 33.032605][ T1896] ? brcmf_usb_deq+0x1a7/0x260 [ 33.033087][ T1896] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 33.033582][ T1896] brcmf_attach+0x246/0xd40 [ 33.034022][ T1896] ? wiphy_new_nm+0x1476/0x1d50 [ 33.034383][ T1896] ? kmemdup+0x30/0x40 [ 33.034722][ T1896] brcmf_usb_probe+0x12de/0x1690 [ 33.035223][ T1896] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 33.035833][ T1896] usb_probe_interface+0x25f/0x710 [ 33.036315][ T1896] really_probe+0x1be/0xa90 [ 33.036656][ T1896] __driver_probe_device+0x2ab/0x460 [ 33.037026][ T1896] ? usb_match_id.part.0+0x88/0xc0 [ 33.037383][ T1896] driver_probe_device+0x49/0x120 [ 33.037790][ T1896] __device_attach_driver+0x18a/0x250 [ 33.038300][ T1896] ? driver_allows_async_probing+0x120/0x120 [ 33.038986][ T1896] bus_for_each_drv+0x123/0x1a0 [ 33.039906][ T1896] ? bus_rescan_devices+0x20/0x20 [ 33.041412][ T1896] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 33.041861][ T1896] ? trace_hardirqs_on+0x1c/0x120 [ 33.042330][ T1896] __device_attach+0x207/0x330 [ 33.042664][ T1896] ? device_bind_driver+0xb0/0xb0 [ 33.043026][ T1896] ? kobject_uevent_env+0x230/0x12c0 [ 33.043515][ T1896] bus_probe_device+0x1a2/0x260 [ 33.043914][ T1896] device_add+0xa61/0x1ce0 [ 33.044227][ T1896] ? __mutex_unlock_slowpath+0xe7/0x660 [ 33.044891][ T1896] ? __fw_devlink_link_to_suppliers+0x550/0x550 [ 33.045531][ T1896] usb_set_configuration+0x984/0x1770 [ 33.046051][ T1896] ? kernfs_create_link+0x175/0x230 [ 33.046548][ T1896] usb_generic_driver_probe+0x69/0x90 [ 33.046931][ T1896] usb_probe_device+0x9c/0x220 [ 33.047434][ T1896] really_probe+0x1be/0xa90 [ 33.047760][ T1896] __driver_probe_device+0x2ab/0x460 [ 33.048134][ T1896] driver_probe_device+0x49/0x120 [ 33.048516][ T1896] __device_attach_driver+0x18a/0x250 [ 33.048910][ T1896] ? driver_allows_async_probing+0x120/0x120 ---truncated---
How severe is CVE-2023-53582?: CVE-2023-53582 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-53582 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53582?: CVE-2023-53582 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-53582?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-53582 have an EU (EUVD) identifier?: Yes. CVE-2023-53582 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32279.
When was CVE-2023-53582 published?: CVE-2023-53582 was published on 2025-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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