github - ghsa-6mx2-jh62-9j5h

GHSA-6MX2-JH62-9J5H

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-11-07 21:31

Details

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

s390: avoid using global register for current_stack_pointer

Commit 30de14b1884b ("s390: current_stack_pointer shouldn't be a function") made current_stack_pointer a global register variable like on many other architectures. Unfortunately on s390 it uncovers old gcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87 ("S/390: Fix PR89775. Stackpointer save/restore instructions removed")] and backported to gcc-8.4 and later. Due to this bug gcc versions prior to 8.4 generate broken code which leads to stack corruptions.

Current minimal gcc version required to build the kernel is declared as 5.1. It is not possible to fix all old gcc versions, so work around this problem by avoiding using global register variable for current_stack_pointer.

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49804"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:03Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390: avoid using global register for current_stack_pointer\n\nCommit 30de14b1884b (\"s390: current_stack_pointer shouldn\u0027t be a\nfunction\") made current_stack_pointer a global register variable like\non many other architectures. Unfortunately on s390 it uncovers old\ngcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87\n(\"S/390: Fix PR89775. Stackpointer save/restore instructions removed\")]\nand backported to gcc-8.4 and later. Due to this bug gcc versions prior\nto 8.4 generate broken code which leads to stack corruptions.\n\nCurrent minimal gcc version required to build the kernel is declared\nas 5.1. It is not possible to fix all old gcc versions, so work\naround this problem by avoiding using global register variable for\ncurrent_stack_pointer.",
  "id": "GHSA-6mx2-jh62-9j5h",
  "modified": "2025-11-07T21:31:19Z",
  "published": "2025-05-01T15:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49804"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a478952a8ac44e32316dc046a063a7dc34825aa6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3c11025bcd2142a61abe5806b2f86a0e78118df"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49804 (GCVE-0-2022-49804)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2025-05-04 08:45

Summary

In the Linux kernel, the following vulnerability has been resolved: s390: avoid using global register for current_stack_pointer Commit 30de14b1884b ("s390: current_stack_pointer shouldn't be a function") made current_stack_pointer a global register variable like on many other architectures. Unfortunately on s390 it uncovers old gcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87 ("S/390: Fix PR89775. Stackpointer save/restore instructions removed")] and backported to gcc-8.4 and later. Due to this bug gcc versions prior to 8.4 generate broken code which leads to stack corruptions. Current minimal gcc version required to build the kernel is declared as 5.1. It is not possible to fix all old gcc versions, so work around this problem by avoiding using global register variable for current_stack_pointer.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a478952a8ac44e323…
	https://git.kernel.org/stable/c/e3c11025bcd2142a6…

Impacted products

Vendor

Product

Version

Linux

Affected: 30de14b1884ba609fc1acfba5b40309e3a6ccefe , < a478952a8ac44e32316dc046a063a7dc34825aa6 (git)
Affected: 30de14b1884ba609fc1acfba5b40309e3a6ccefe , < e3c11025bcd2142a61abe5806b2f86a0e78118df (git)

Linux

Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/include/asm/processor.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a478952a8ac44e32316dc046a063a7dc34825aa6",
              "status": "affected",
              "version": "30de14b1884ba609fc1acfba5b40309e3a6ccefe",
              "versionType": "git"
            },
            {
              "lessThan": "e3c11025bcd2142a61abe5806b2f86a0e78118df",
              "status": "affected",
              "version": "30de14b1884ba609fc1acfba5b40309e3a6ccefe",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390: avoid using global register for current_stack_pointer\n\nCommit 30de14b1884b (\"s390: current_stack_pointer shouldn\u0027t be a\nfunction\") made current_stack_pointer a global register variable like\non many other architectures. Unfortunately on s390 it uncovers old\ngcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87\n(\"S/390: Fix PR89775. Stackpointer save/restore instructions removed\")]\nand backported to gcc-8.4 and later. Due to this bug gcc versions prior\nto 8.4 generate broken code which leads to stack corruptions.\n\nCurrent minimal gcc version required to build the kernel is declared\nas 5.1. It is not possible to fix all old gcc versions, so work\naround this problem by avoiding using global register variable for\ncurrent_stack_pointer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:45:42.406Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a478952a8ac44e32316dc046a063a7dc34825aa6"
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        {
          "url": "https://git.kernel.org/stable/c/e3c11025bcd2142a61abe5806b2f86a0e78118df"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49804",
    "datePublished": "2025-05-01T14:09:31.590Z",
    "dateReserved": "2025-05-01T14:05:17.225Z",
    "dateUpdated": "2025-05-04T08:45:42.406Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-6MX2-JH62-9J5H

CVE-2022-49804 (GCVE-0-2022-49804)

Tags

Sightings

Nomenclature