Vulnerability-Lookup

GHSA-MP8J-7V82-R69X

Vulnerability from github – Published: 2026-07-01 15:35 – Updated: 2026-07-01 15:35

Details

In the Linux kernel, the following vulnerability has been resolved:

rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES

Due to a rustc bug [1] the -Cforce-unwind-tables=y flag only emits the uwtable annotation for functions, but not for the module. This means that compiler-generated functions such as 'asan.module_ctor' do not receive the uwtable annotation.

When CONFIG_UNWIND_PATCH_PAC_INTO_SCS is enabled, this leads to boot failures because the dwarf information emitted for the kasan constructors is wrong, which causes the SCS boot patching code to patch the constructor in an illegal manner. Specifically, the paciasp instruction is patched, but the autiasp instruction is not. This mismatch leads to a crash when the constructor is called during boot.

==================================================================
BUG: KASAN: global-out-of-bounds in do_basic_setup+0x4c/0x90
Read of size 8 at addr ffffffe3cc7eb488 by task swapper/0/1

Specifically the faulting instruction is the (*fn)() to invoke the constructor in do_ctors() of the init/main.c file.

Once the fix lands in rustc, this flag can be made conditional on the rustc version. Note that passing the flag on a rustc with the fix present has no effect.

[ The fix [1] has landed for Rust 1.98.0 (expected release on 2026-08-20).

Thus add a version check as discussed.

- Miguel ]

[ Adjusted link and comment. - Miguel ]

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53346"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-01T14:16:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES\n\nDue to a rustc bug [1] the -Cforce-unwind-tables=y flag only emits the\nuwtable annotation for functions, but not for the module. This means\nthat compiler-generated functions such as \u0027asan.module_ctor\u0027 do not\nreceive the uwtable annotation.\n\nWhen CONFIG_UNWIND_PATCH_PAC_INTO_SCS is enabled, this leads to boot\nfailures because the dwarf information emitted for the kasan\nconstructors is wrong, which causes the SCS boot patching code to\npatch the constructor in an illegal manner. Specifically, the paciasp\ninstruction is patched, but the autiasp instruction is not. This\nmismatch leads to a crash when the constructor is called during boot.\n\n\t==================================================================\n\tBUG: KASAN: global-out-of-bounds in do_basic_setup+0x4c/0x90\n\tRead of size 8 at addr ffffffe3cc7eb488 by task swapper/0/1\n\nSpecifically the faulting instruction is the (*fn)() to invoke the\nconstructor in do_ctors() of the init/main.c file.\n\nOnce the fix lands in rustc, this flag can be made conditional on the\nrustc version. Note that passing the flag on a rustc with the fix\npresent has no effect.\n\n[ The fix [1] has landed for Rust 1.98.0 (expected release on\n  2026-08-20).\n\n  Thus add a version check as discussed.\n\n    - Miguel ]\n\n[ Adjusted link and comment. - Miguel ]",
  "id": "GHSA-mp8j-7v82-r69x",
  "modified": "2026-07-01T15:35:19Z",
  "published": "2026-07-01T15:35:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53346"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7de13410f59e59b21d3c268a6e22d40f5d9d8a54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bde772ee239720af216fb0b14753971059e132dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0f25a1755f2c15b1746379c8d9d7dfde85f58f5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-53346 (GCVE-0-2026-53346)

Vulnerability from cvelistv5 – Published: 2026-07-01 13:32 – Updated: 2026-07-01 13:32

Title

rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES

Summary

In the Linux kernel, the following vulnerability has been resolved: rust: arm64: set uwtable llvm module flag for CONFIG_UNWIND_TABLES Due to a rustc bug [1] the -Cforce-unwind-tables=y flag only emits the uwtable annotation for functions, but not for the module. This means that compiler-generated functions such as 'asan.module_ctor' do not receive the uwtable annotation. When CONFIG_UNWIND_PATCH_PAC_INTO_SCS is enabled, this leads to boot failures because the dwarf information emitted for the kasan constructors is wrong, which causes the SCS boot patching code to patch the constructor in an illegal manner. Specifically, the paciasp instruction is patched, but the autiasp instruction is not. This mismatch leads to a crash when the constructor is called during boot. ================================================================== BUG: KASAN: global-out-of-bounds in do_basic_setup+0x4c/0x90 Read of size 8 at addr ffffffe3cc7eb488 by task swapper/0/1 Specifically the faulting instruction is the (*fn)() to invoke the constructor in do_ctors() of the init/main.c file. Once the fix lands in rustc, this flag can be made conditional on the rustc version. Note that passing the flag on a rustc with the fix present has no effect. [ The fix [1] has landed for Rust 1.98.0 (expected release on 2026-08-20). Thus add a version check as discussed. - Miguel ] [ Adjusted link and comment. - Miguel ]

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/bde772ee239720af2…
https://git.kernel.org/stable/c/d0f25a1755f2c15b1…
https://git.kernel.org/stable/c/7de13410f59e59b21…
https://git.kernel.org/stable/c/ac35b5580ace12e5d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d077242d68a31075ef5f5da041bf8f6fc19aa231 , < bde772ee239720af216fb0b14753971059e132dc (git) Affected: d077242d68a31075ef5f5da041bf8f6fc19aa231 , < d0f25a1755f2c15b1746379c8d9d7dfde85f58f5 (git) Affected: d077242d68a31075ef5f5da041bf8f6fc19aa231 , < 7de13410f59e59b21d3c268a6e22d40f5d9d8a54 (git) Affected: d077242d68a31075ef5f5da041bf8f6fc19aa231 , < ac35b5580ace12e5d0a0b5e61e36d2c4e1ffa29c (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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    "datePublished": "2026-07-01T13:32:25.668Z",
    "dateReserved": "2026-06-09T07:44:35.399Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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GHSA-MP8J-7V82-R69X

CVE-2026-53346 (GCVE-0-2026-53346)

Tags

Sightings

Nomenclature