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CVE-2026-53343— ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow

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 6.13版本存在安全漏洞，该漏洞源于KASAN VMAP堆栈影子读取时使用了字加载而非按字节加载，导致未对齐加载在ARMv5上触发对齐异常，可能造成系统崩溃。

AI Predicted 5.3 Difficulty: Theoretical EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 17

VendorProduct Version RangeStatus
Linux Linux 8fe148d39c127de3fb78dfa6da95a3608dfda454< c0b8c148a7754826156993ed6442d31536ec86b4 affected
ef21187c0672a2b2cbec44f33bab9ec47d5c277c< c2e3aadc8fef7da068490597fc5582f8f362aeb2 affected
c86d26b4b089ca294b3b7d915a7da61edb77935f< c74990828d3c486ee44aaa68240eb3abff289d1c affected
44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2< 517720913bd3c17a52cd55a740064f68455ab88e affected
44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2< 2a4dc9a0ac3326e79fb58fdaae724b92127709a9 affected
44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2< 77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6 affected
6.1.120< 6.1.176 affected
6.6.64< 6.6.143 affected
… +9 more rows
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I. Basic Information for CVE-2026-53343

Vulnerability Information
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Vulnerability Title
ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow Commit 44e9a3bb76e5 ("ARM: 9430/1: entry: Do a dummy read from VMAP shadow") added a dummy read from the KASAN VMAP stack shadow in __switch_to(). The read uses ldr, but the KASAN shadow address is byte-granular and is not guaranteed to be word aligned. ARMv5 faults unaligned word loads. With CONFIG_KASAN_VMALLOC and CONFIG_VMAP_STACK enabled, ARM926/VersatilePB crashes in __switch_to() with an alignment exception before reaching init. Use ldrb for the dummy shadow access. The code only needs to fault in the shadow mapping if the stack shadow is missing, so a byte load is sufficient and matches the granularity of KASAN shadow memory.
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 6.13版本存在安全漏洞，该漏洞源于KASAN VMAP堆栈影子读取时使用了字加载而非按字节加载，导致未对齐加载在ARMv5上触发对齐异常，可能造成系统崩溃。
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 8fe148d39c127de3fb78dfa6da95a3608dfda454 ~ c0b8c148a7754826156993ed6442d31536ec86b4 -
Linux Linux 6.13 -

II. Public POCs for CVE-2026-53343

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III. Intelligence Information for CVE-2026-53343

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Patches & Fixes for CVE-2026-53343 (5)

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-2026-53345 KVM: Don't WARN if memory is dirtied without a vCPU when the VM is dying
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-2026-53348 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-2026-53342 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-2026-53343

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