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CVE-2026-53338— net: airoha: Add NULL check for of_reserved_mem_lookup() in airoha_qdma_init_hfwd_queues()

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 6.16版本存在安全漏洞，该漏洞源于对of_reserved_mem_lookup()返回值未进行空检查，可能导致内核空指针取消引用。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.11% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b< 01f7d4b504580664d36faea5671cde5e3f0d8a5b affected
3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b< cdb96c42db7b256348f9b57718debfaa4bca6b39 affected
3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b< f9f25118faa4dd2b6e3d14a03d123bbdbd59925d affected
6.16 affected
< 6.16 unaffected
6.18.36≤ 6.18.* unaffected
7.0.13≤ 7.0.* unaffected
7.1≤ * unaffected
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I. Basic Information for CVE-2026-53338

Vulnerability Information
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Vulnerability Title
net: airoha: Add NULL check for of_reserved_mem_lookup() in airoha_qdma_init_hfwd_queues()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: airoha: Add NULL check for of_reserved_mem_lookup() in airoha_qdma_init_hfwd_queues() of_reserved_mem_lookup() may return NULL if the reserved memory region referenced by the "memory-region" phandle is not found in the reserved memory table (e.g. due to a misconfigured DTS or a removed memory-region node). The current code dereferences the returned pointer without checking for NULL, leading to a kernel NULL pointer dereference at the following lines: dma_addr = rmem->base; // line 1156 num_desc = div_u64(rmem->size, buf_size); // line 1160 Add a NULL check after of_reserved_mem_lookup() and return -ENODEV if the lookup fails, which is consistent with the existing error handling for of_parse_phandle() failure in the same code block.
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 6.16版本存在安全漏洞，该漏洞源于对of_reserved_mem_lookup()返回值未进行空检查，可能导致内核空指针取消引用。
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 3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b ~ 01f7d4b504580664d36faea5671cde5e3f0d8a5b -
Linux Linux 6.16 -

II. Public POCs for CVE-2026-53338

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III. Intelligence Information for CVE-2026-53338

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Patches & Fixes for CVE-2026-53338 (3)

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-2026-53356 7.8 HIGH drm/i915/gem: Fix phys BO pread/pwrite with offset
CVE-2026-53341 7.8 HIGH fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh()
CVE-2026-53329 7.0 HIGH drm/amd/display: Use krealloc_array() in dal_vector_reserve()
CVE-2026-53342 arm64: mm: call pagetable dtor when freeing hot-removed page tables
CVE-2026-53353 hsr: Remove WARN_ONCE() in hsr_addr_is_self().
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-2026-53348 ASoC: SDCA: fix NULL pointer dereference in sdca_dev_unregister_functions
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-2026-53343 ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow
CVE-2026-53327 debugobjects: Do not fill_pool() if pi_blocked_on
CVE-2026-53340 i2c: imx: fix clock and pinctrl state inconsistency in runtime PM
CVE-2026-53339 i2c: qcom-cci: Fix NULL pointer dereference in cci_remove()

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-2026-53338

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