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CVE-2026-53288— arm64: Reserve an extra page for early kernel mapping

AI Predicted 5.5 Difficulty: Trivial EPSS 0.12% · P2

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 13

VendorProductVersion RangeStatus
LinuxLinuxfdd380a5950503a07aaaf74536a0c2f223475eb0< a4ff33053da0a34b14abb5c96dc5a48379e26fceaffected
5973a62efa34c80c9a4e5eac1fca6f6209b902af< dcb89deed40ba55ff7020061712fdabf098cc2ccaffected
5973a62efa34c80c9a4e5eac1fca6f6209b902af< 9fe9e3acaa14921b0cf0d6cc2de5b562499bf721affected
5973a62efa34c80c9a4e5eac1fca6f6209b902af< 4d8e74ad4585672489da6145b3328d415f50db82affected
88025faf2aa08c7468d68d8cb31a53b55aae6ee0affected
6.12.54< 6.12.91affected
6.17.4< 6.18affected
6.18affected
… +5 more rows
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I. Basic Information for CVE-2026-53288

Vulnerability Information
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Vulnerability Title
arm64: Reserve an extra page for early kernel mapping
Source: NVD (National Vulnerability Database)
Vulnerability Description
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]
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的操作系统Linux所使用的内核。 Linux kernel 6.18版本存在安全漏洞，该漏洞源于arm64早期内核映射中，[data, end)段的最后部分可能溢出到init_pg_end的下一个页面，导致需要额外保留一页映射。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux fdd380a5950503a07aaaf74536a0c2f223475eb0 ~ a4ff33053da0a34b14abb5c96dc5a48379e26fce -
LinuxLinux 6.18 -

II. Public POCs for CVE-2026-53288

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III. Intelligence Information for CVE-2026-53288

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Patches & Fixes for CVE-2026-53288 (4)

Same Patch Batch · Linux · 2026-06-26 · 47 CVEs total

CVE-2026-533099.8 CRITICALocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
CVE-2026-533228.8 HIGHvfio/pci: Clean up DMABUFs before disabling function
CVE-2026-532818.8 HIGHiommu/vt-d: Avoid NULL pointer dereference or refcount corruption
CVE-2026-533007.8 HIGHnet: enetc: fix NTMP DMA use-after-free issue
CVE-2026-532907.8 HIGHdrm/xe/eustall: Fix drm_dev_put called before stream disable in close
CVE-2026-532847.5 HIGHbtrfs: only release the dirty pages io tree after successful writes
CVE-2026-53278arm_mpam: Check whether the config array is allocated before destroying it
CVE-2026-53289ice: fix NULL pointer dereference in ice_reset_all_vfs()
CVE-2026-53283iommu/amd: Bounds-check devid in __rlookup_amd_iommu()
CVE-2026-53280iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done()
CVE-2026-53282x86/kexec: Push kjump return address even for non-kjump kexec
CVE-2026-53279drm/gma500/oaktrail_lvds: fix hang on init failure
CVE-2026-53291ALSA: hda/conexant: Fix missing error check for jack detection
CVE-2026-53293drm/amdgpu: fix AMDGPU_INFO_READ_MMR_REG
CVE-2026-53294mailbox: mailbox-test: don't free the reused channel
CVE-2026-53295mailbox: add sanity check for channel array
CVE-2026-53296mailbox: mailbox-test: free channels on probe error
CVE-2026-53297net: mana: Guard mana_remove against double invocation
CVE-2026-53298net: airoha: Move ndesc initialization at end of airoha_qdma_init_rx_queue()
CVE-2026-53299net: airoha: Move ndesc initialization at end of airoha_qdma_init_tx()

Showing top 20 of 47 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53288

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