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CVE-2026-53343

ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 8fe148d39c127de3fb78dfa6da95a3608dfda454
Version < c0b8c148a7754826156993ed6442d31536ec86b4
Status affected
Version ef21187c0672a2b2cbec44f33bab9ec47d5c277c
Version < c2e3aadc8fef7da068490597fc5582f8f362aeb2
Status affected
Version c86d26b4b089ca294b3b7d915a7da61edb77935f
Version < c74990828d3c486ee44aaa68240eb3abff289d1c
Status affected
Version 44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2
Version < 517720913bd3c17a52cd55a740064f68455ab88e
Status affected
Version 44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2
Version < 2a4dc9a0ac3326e79fb58fdaae724b92127709a9
Status affected
Version 44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2
Version < 77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6
Status affected
Version 6.1.120
Version < 6.1.176
Status affected
Version 6.6.64
Version < 6.6.143
Status affected
Version 6.12.4
Version < 6.12.94
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.13
Status affected
Version 0
Version < 6.13
Status unaffected
Version <= 6.1.*
Version 6.1.176
Status unaffected
Version <= 6.6.*
Version 6.6.143
Status unaffected
Version <= 6.12.*
Version 6.12.94
Status unaffected
Version <= 6.18.*
Version 6.18.36
Status unaffected
Version <= 7.0.*
Version 7.0.13
Status unaffected
Version <= *
Version 7.1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.056
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/c0b8c148a7754826156993ed6442d31536ec86b4
https://git.kernel.org/stable/c/c2e3aadc8fef7da068490597fc5582f8f362aeb2
https://git.kernel.org/stable/c/c74990828d3c486ee44aaa68240eb3abff289d1c
https://git.kernel.org/stable/c/517720913bd3c17a52cd55a740064f68455ab88e
https://git.kernel.org/stable/c/2a4dc9a0ac3326e79fb58fdaae724b92127709a9
https://git.kernel.org/stable/c/77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6