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CVE-2026-53348— ASoC: SDCA: fix NULL pointer dereference in sdca_dev_unregister_functions

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 6.19版本存在安全漏洞，该漏洞源于ASoC: SDCA的sdca_dev_unregister_functions函数未检查NULL指针，可能导致空指针取消引用，引起内核崩溃。

AI Predicted 5.5 Difficulty: Easy EPSS 0.12% · P1

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 4496d1c65bad7a3a32d2e09aaf3c54bc562c3fcc< 9a4895059bb6a8505098a9f75de187fd15631fc8 affected
4496d1c65bad7a3a32d2e09aaf3c54bc562c3fcc< e4c60a1d4b6ccc66aefb3789cd908d4f9482eefd affected
6.19 affected
< 6.19 unaffected
7.0.13≤ 7.0.* unaffected
7.1≤ * unaffected
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I. Basic Information for CVE-2026-53348

Vulnerability Information
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Vulnerability Title
ASoC: SDCA: fix NULL pointer dereference in sdca_dev_unregister_functions
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: SDCA: fix NULL pointer dereference in sdca_dev_unregister_functions sdca_dev_unregister_functions() iterates over all SDCA function descriptors and calls sdca_dev_unregister() on each func_dev without checking for NULL. When a function registration has failed partway through, or the device cleanup races with probe deferral, func_dev entries may be NULL, leading to a kernel oops: BUG: kernel NULL pointer dereference, address: 0000000000000040 RIP: 0010:device_del+0x1e/0x3e0 Call Trace: sdca_dev_unregister_functions+0x37/0x60 [snd_soc_sdca] release_nodes+0x35/0xb0 devres_release_all+0x90/0x100 device_unbind_cleanup+0xe/0x80 device_release_driver_internal+0x1c1/0x200 bus_remove_device+0xc6/0x130 device_del+0x161/0x3e0 device_unregister+0x17/0x60 sdw_delete_slave+0xb6/0xd0 [soundwire_bus] sdw_bus_master_delete+0x1e/0x50 [soundwire_bus] ... sof_probe_work+0x19/0x30 [snd_sof] This was observed on a Lenovo ThinkPad X1 Carbon G14 (Panther Lake) with the SOF audio driver probe failing due to missing Panther Lake firmware, causing the subsequent cleanup of SoundWire devices to trigger the crash. Fix this with three changes: 1) Add a NULL guard in sdca_dev_unregister() so that callers do not need to pre-validate the pointer (defense in depth). 2) In sdca_dev_unregister_functions(), skip NULL func_dev entries and clear func_dev to NULL after unregistration, making the function idempotent and safe against double-invocation. 3) In sdca_dev_register_functions(), roll back all previously registered functions when a later one fails, so the function array is never left in a partially-populated state.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 6.19版本存在安全漏洞，该漏洞源于ASoC: SDCA的sdca_dev_unregister_functions函数未检查NULL指针，可能导致空指针取消引用，引起内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4496d1c65bad7a3a32d2e09aaf3c54bc562c3fcc ~ 9a4895059bb6a8505098a9f75de187fd15631fc8 -
Linux Linux 6.19 -

II. Public POCs for CVE-2026-53348

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III. Intelligence Information for CVE-2026-53348

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Patches & Fixes for CVE-2026-53348 (2)

Same Patch Batch · Linux · 2026-07-01 · 31 CVEs total

CVE-2026-53355 9.8 CRITICAL net: rds: clear i_sends on setup unwind
CVE-2026-53354 8.8 HIGH arm64: errata: Mitigate TLBI errata on various Arm CPUs
CVE-2026-53341 7.8 HIGH fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh()
CVE-2026-53356 7.8 HIGH drm/i915/gem: Fix phys BO pread/pwrite with offset
CVE-2026-53329 7.0 HIGH drm/amd/display: Use krealloc_array() in dal_vector_reserve()
CVE-2026-53343 ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow
CVE-2026-53326 debugobjects: Don't call fill_pool() in early boot hardirq context
CVE-2026-53328 sched_ext: Don't warn on NULL cgrp_moving_from in scx_cgroup_move_task()
CVE-2026-53353 hsr: Remove WARN_ONCE() in hsr_addr_is_self().
CVE-2026-53330 drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()
CVE-2026-53352 signal: clear JOBCTL_PENDING_MASK for caller in zap_other_threads()
CVE-2026-53351 riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI
CVE-2026-53350 ASoC: wm_adsp: Fix NULL dereference when removing firmware controls
CVE-2026-53349 netfilter: nf_conntrack: destroy stale expectfn expectations on unregister
CVE-2026-53346 rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES
CVE-2026-53347 drm/virtio: Fix driver removal with disabled KMS
CVE-2026-53344 pinctrl: mcp23s08: Initialize mcp->dev and mcp->addr before regmap init
CVE-2026-53345 KVM: Don't WARN if memory is dirtied without a vCPU when the VM is dying
CVE-2026-53342 arm64: mm: call pagetable dtor when freeing hot-removed page tables
CVE-2026-53327 debugobjects: Do not fill_pool() if pi_blocked_on

Showing top 20 of 31 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53348

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