CVE-2022-49990 (GCVE-0-2022-49990)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2025-06-18 11:00
VLAI?
Title
s390: fix double free of GS and RI CBs on fork() failure
Summary
In the Linux kernel, the following vulnerability has been resolved: s390: fix double free of GS and RI CBs on fork() failure The pointers for guarded storage and runtime instrumentation control blocks are stored in the thread_struct of the associated task. These pointers are initially copied on fork() via arch_dup_task_struct() and then cleared via copy_thread() before fork() returns. If fork() happens to fail after the initial task dup and before copy_thread(), the newly allocated task and associated thread_struct memory are freed via free_task() -> arch_release_task_struct(). This results in a double free of the guarded storage and runtime info structs because the fields in the failed task still refer to memory associated with the source task. This problem can manifest as a BUG_ON() in set_freepointer() (with CONFIG_SLAB_FREELIST_HARDENED enabled) or KASAN splat (if enabled) when running trinity syscall fuzz tests on s390x. To avoid this problem, clear the associated pointer fields in arch_dup_task_struct() immediately after the new task is copied. Note that the RI flag is still cleared in copy_thread() because it resides in thread stack memory and that is where stack info is copied.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8d9047f8b967ce6181fd824ae922978e1b055cc0 , < 25a95303b9e513cd2978aacc385d06e6fec23d07 (git)
Affected: 8d9047f8b967ce6181fd824ae922978e1b055cc0 , < cacd522e6652fbc2dc0cc6ae11c4e30782fef14b (git)
Affected: 8d9047f8b967ce6181fd824ae922978e1b055cc0 , < 297ae7e87a87a001dd3dfeac1cb26a42fd929708 (git)
Affected: 8d9047f8b967ce6181fd824ae922978e1b055cc0 , < 8195e065abf3df84eb0ad2987e76a40f21d1791c (git)
Affected: 8d9047f8b967ce6181fd824ae922978e1b055cc0 , < fbdc482d43eda40a70de4b0155843d5472f6de62 (git)
Affected: 8d9047f8b967ce6181fd824ae922978e1b055cc0 , < 13cccafe0edcd03bf1c841de8ab8a1c8e34f77d9 (git)
Affected: 9e51ee1b76efc7b5e9404010793a39fde0e03cb7 (git)
Affected: 232b47b3c88af1da737cd7760f247c4ed58168cf (git)
Affected: b8e212c599082896a180a18a0c9bd529526590be (git)
Create a notification for this product.
    Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 4.19.257 , ≤ 4.19.* (semver)
Unaffected: 5.4.212 , ≤ 5.4.* (semver)
Unaffected: 5.10.140 , ≤ 5.10.* (semver)
Unaffected: 5.15.64 , ≤ 5.15.* (semver)
Unaffected: 5.19.6 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/kernel/process.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "25a95303b9e513cd2978aacc385d06e6fec23d07",
              "status": "affected",
              "version": "8d9047f8b967ce6181fd824ae922978e1b055cc0",
              "versionType": "git"
            },
            {
              "lessThan": "cacd522e6652fbc2dc0cc6ae11c4e30782fef14b",
              "status": "affected",
              "version": "8d9047f8b967ce6181fd824ae922978e1b055cc0",
              "versionType": "git"
            },
            {
              "lessThan": "297ae7e87a87a001dd3dfeac1cb26a42fd929708",
              "status": "affected",
              "version": "8d9047f8b967ce6181fd824ae922978e1b055cc0",
              "versionType": "git"
            },
            {
              "lessThan": "8195e065abf3df84eb0ad2987e76a40f21d1791c",
              "status": "affected",
              "version": "8d9047f8b967ce6181fd824ae922978e1b055cc0",
              "versionType": "git"
            },
            {
              "lessThan": "fbdc482d43eda40a70de4b0155843d5472f6de62",
              "status": "affected",
              "version": "8d9047f8b967ce6181fd824ae922978e1b055cc0",
              "versionType": "git"
            },
            {
              "lessThan": "13cccafe0edcd03bf1c841de8ab8a1c8e34f77d9",
              "status": "affected",
              "version": "8d9047f8b967ce6181fd824ae922978e1b055cc0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9e51ee1b76efc7b5e9404010793a39fde0e03cb7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "232b47b3c88af1da737cd7760f247c4ed58168cf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b8e212c599082896a180a18a0c9bd529526590be",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/kernel/process.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.257",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.257",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.212",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.140",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.64",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.6",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.4.105",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.9.68",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.14.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390: fix double free of GS and RI CBs on fork() failure\n\nThe pointers for guarded storage and runtime instrumentation control\nblocks are stored in the thread_struct of the associated task. These\npointers are initially copied on fork() via arch_dup_task_struct()\nand then cleared via copy_thread() before fork() returns. If fork()\nhappens to fail after the initial task dup and before copy_thread(),\nthe newly allocated task and associated thread_struct memory are\nfreed via free_task() -\u003e arch_release_task_struct(). This results in\na double free of the guarded storage and runtime info structs\nbecause the fields in the failed task still refer to memory\nassociated with the source task.\n\nThis problem can manifest as a BUG_ON() in set_freepointer() (with\nCONFIG_SLAB_FREELIST_HARDENED enabled) or KASAN splat (if enabled)\nwhen running trinity syscall fuzz tests on s390x. To avoid this\nproblem, clear the associated pointer fields in\narch_dup_task_struct() immediately after the new task is copied.\nNote that the RI flag is still cleared in copy_thread() because it\nresides in thread stack memory and that is where stack info is\ncopied."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:00:51.035Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/25a95303b9e513cd2978aacc385d06e6fec23d07"
        },
        {
          "url": "https://git.kernel.org/stable/c/cacd522e6652fbc2dc0cc6ae11c4e30782fef14b"
        },
        {
          "url": "https://git.kernel.org/stable/c/297ae7e87a87a001dd3dfeac1cb26a42fd929708"
        },
        {
          "url": "https://git.kernel.org/stable/c/8195e065abf3df84eb0ad2987e76a40f21d1791c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fbdc482d43eda40a70de4b0155843d5472f6de62"
        },
        {
          "url": "https://git.kernel.org/stable/c/13cccafe0edcd03bf1c841de8ab8a1c8e34f77d9"
        }
      ],
      "title": "s390: fix double free of GS and RI CBs on fork() failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49990",
    "datePublished": "2025-06-18T11:00:51.035Z",
    "dateReserved": "2025-06-18T10:57:27.386Z",
    "dateUpdated": "2025-06-18T11:00:51.035Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.