CVE-2026-53288

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-53288
In the Linux kernel, the following vulnerability has been resolved: arm64: Reserve an extra page for early kernel mapping The final part of [data, end) segment may overflow into the next page of init_pg_end[1] which is the gap page before early_init_stack[2]: [1] crash_arm64_v9.0.1> vtop ffffffed00601000 VIRTUAL PHYSICAL ffffffed00601000 83401000 PAGE DIRECTORY: ffffffecffd62000 PGD: ffffffecffd62da0 => 10000000833fb003 PMD: ffffff80033fb018 => 10000000833fe003 PTE: ffffff80033fe008 => 68000083401f03 PAGE: 83401000 PTE PHYSICAL FLAGS 68000083401f03 83401000 (VALID|SHARED|AF|NG|PXN|UXN) PAGE PHYSICAL MAPPING INDEX CNT FLAGS fffffffec00d0040 83401000 0 0 1 4000 reserved [2] ffffffed002c8000 (r) __pi__data ffffffed0054e000 (d) __pi___bss_start ffffffed005f5000 (b) __pi_init_pg_dir ffffffed005fe000 (b) __pi_init_pg_end ffffffed005ff000 (B) early_init_stack ffffffed00608000 (b) __pi__end For 4K pages, the early kernel mapping may use 2MB block entries but the kernel segments are only 64KB aligned. Segment boundaries that fall within a 2MB block therefore require a PTE table so that different attributes can be applied on either side of the boundary. KERNEL_SEGMENT_COUNT still correctly counts the five permanent kernel VMAs registered by declare_kernel_vmas(). However, since commit 5973a62efa34 ("arm64: map [_text, _stext) virtual address range non-executable+read-only"), the early mapper also maps [_text, _stext) separately from [_stext, _etext). This adds one more early-only split and can require one more page-table page than the existing EARLY_SEGMENT_EXTRA_PAGES allowance reserves. Increase the 4K-page early mapping allowance by one page to cover that additional split. [catalin.marinas@arm.com: rewrote part of the commit log] [catalin.marinas@arm.com: expanded the code comment]

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/4d8e74ad4585672489da6145b3328d415f50db82 Patch
https://git.kernel.org/stable/c/9fe9e3acaa14921b0cf0d6cc2de5b562499bf721 Patch
https://git.kernel.org/stable/c/a4ff33053da0a34b14abb5c96dc5a48379e26fce Patch
https://git.kernel.org/stable/c/dcb89deed40ba55ff7020061712fdabf098cc2cc Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
History

08 Jul 2026, 03:54

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
CWE CWE-674
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/4d8e74ad4585672489da6145b3328d415f50db82 - () https://git.kernel.org/stable/c/4d8e74ad4585672489da6145b3328d415f50db82 - Patch
References () https://git.kernel.org/stable/c/9fe9e3acaa14921b0cf0d6cc2de5b562499bf721 - () https://git.kernel.org/stable/c/9fe9e3acaa14921b0cf0d6cc2de5b562499bf721 - Patch
References () https://git.kernel.org/stable/c/a4ff33053da0a34b14abb5c96dc5a48379e26fce - () https://git.kernel.org/stable/c/a4ff33053da0a34b14abb5c96dc5a48379e26fce - Patch
References () https://git.kernel.org/stable/c/dcb89deed40ba55ff7020061712fdabf098cc2cc - () https://git.kernel.org/stable/c/dcb89deed40ba55ff7020061712fdabf098cc2cc - Patch

26 Jun 2026, 20:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-26 20:17

Updated : 2026-07-08 03:54

NVD link : CVE-2026-53288

Mitre link : CVE-2026-53288

CVE.ORG link : CVE-2026-53288

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-674

Uncontrolled Recursion