CVE-2026-53346

Boot crash via missing module unwind annotation

Published Jul 1, 2026 · Updated Jul 1, 2026

Out-of-bounds read in Rust-built arm64 Linux Kernel constructor code causes affected systems to crash during boot. Rust builds omit the LLVM uwtable module flag, so generated KASAN constructors have incorrect DWARF unwind data and SCS patching replaces paciasp without matching autiasp. The failure requires CONFIG_UNWIND_PATCH_PAC_INTO_SCS and occurs when do_ctors() invokes the malformed constructor, preventing a successful boot.

CVSS severity7.1
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Rust-built arm64 Linux Kernel constructor code causes affected systems to crash during boot. Rust builds omit the LLVM uwtable module flag, so generated KASAN constructors have incorrect DWARF unwind data and SCS patching replaces paciasp without matching autiasp. The failure requires CONFIG_UNWIND_PATCH_PAC_INTO_SCS and occurs when do_ctors() invokes the malformed constructor, preventing a successful boot.

The record

CVE
CVE-2026-53346
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.12
  2. Affected versionversion=d077242d68a31075ef5f5da041bf8f6fc19aa231 <7de13410f59e59b21d3c268a6e22d40f5d9d8a54
  3. Affected versionversion=d077242d68a31075ef5f5da041bf8f6fc19aa231 <ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c
  4. Affected versionversion=d077242d68a31075ef5f5da041bf8f6fc19aa231 <bde772ee239720af216fb0b14753971059e132dc
  5. Affected versionversion=d077242d68a31075ef5f5da041bf8f6fc19aa231 <d0f25a1755f2c15b1746379c8d9d7dfde85f58f5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.12; version=d077242d68a31075ef5f5da041bf8f6fc19aa231 <7de13410f59e59b21d3c268a6e22d40f5d9d8a54; version=d077242d68a31075ef5f5da041bf8f6fc19aa231 <ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c; version=d077242d68a31075ef5f5da041bf8f6fc19aa231 <bde772ee239720af216fb0b14753971059e132dc; version=d077242d68a31075ef5f5da041bf8f6fc19aa231 <d0f25a1755f2c15b1746379c8d9d7dfde85f58f5

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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