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CVE-2022-48726 (GCVE-0-2022-48726)

Vulnerability from cvelistv5 – Published: 2024-06-20 11:13 – Updated: 2026-08-05 08:51
VLAI
Title
RDMA/ucma: Protect mc during concurrent multicast leaves
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/ucma: Protect mc during concurrent multicast leaves Partially revert the commit mentioned in the Fixes line to make sure that allocation and erasing multicast struct are locked. BUG: KASAN: use-after-free in ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline] BUG: KASAN: use-after-free in ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579 Read of size 8 at addr ffff88801bb74b00 by task syz-executor.1/25529 CPU: 0 PID: 25529 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline] ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579 ucma_destroy_id+0x1e6/0x280 drivers/infiniband/core/ucma.c:614 ucma_write+0x25c/0x350 drivers/infiniband/core/ucma.c:1732 vfs_write+0x28e/0xae0 fs/read_write.c:588 ksys_write+0x1ee/0x250 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Currently the xarray search can touch a concurrently freeing mc as the xa_for_each() is not surrounded by any lock. Rather than hold the lock for a full scan hold it only for the effected items, which is usually an empty list.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:11 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 95fe51096b7adf1d1e7315c49c75e2f75f162584 , < 75c610212b9f1756b9384911d3a2c347eee8031c (git)
Affected: 95fe51096b7adf1d1e7315c49c75e2f75f162584 , < 2923948ffe0835f7114e948b35bcc42bc9b3baa1 (git)
Affected: 95fe51096b7adf1d1e7315c49c75e2f75f162584 , < ee2477e8ccd3d978eeac0dc5a981b286d9bb7b0a (git)
Affected: 95fe51096b7adf1d1e7315c49c75e2f75f162584 , < 36e8169ec973359f671f9ec7213547059cae972e (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.99 , ≤ 5.10.* (semver)
Unaffected: 5.15.22 , ≤ 5.15.* (semver)
Unaffected: 5.16.8 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48726\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-20T12:15:11.077\",\"lastModified\":\"2026-08-04T10:17:17.803\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/ucma: Protect mc during concurrent multicast leaves\\n\\nPartially revert the commit mentioned in the Fixes line to make sure that\\nallocation and erasing multicast struct are locked.\\n\\n  BUG: KASAN: use-after-free in ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]\\n  BUG: KASAN: use-after-free in ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579\\n  Read of size 8 at addr ffff88801bb74b00 by task syz-executor.1/25529\\n  CPU: 0 PID: 25529 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0\\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n  Call Trace:\\n   __dump_stack lib/dump_stack.c:88 [inline]\\n   dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\\n   print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247\\n   __kasan_report mm/kasan/report.c:433 [inline]\\n   kasan_report.cold+0x83/0xdf mm/kasan/report.c:450\\n   ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]\\n   ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579\\n   ucma_destroy_id+0x1e6/0x280 drivers/infiniband/core/ucma.c:614\\n   ucma_write+0x25c/0x350 drivers/infiniband/core/ucma.c:1732\\n   vfs_write+0x28e/0xae0 fs/read_write.c:588\\n   ksys_write+0x1ee/0x250 fs/read_write.c:643\\n   do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n   do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nCurrently the xarray search can touch a concurrently freeing mc as the\\nxa_for_each() is not surrounded by any lock. Rather than hold the lock for\\na full scan hold it only for the effected items, which is usually an empty\\nlist.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/ucma: protege mc durante las salidas simult\u00e1neas de multidifusi\u00f3n. Revierta parcialmente la confirmaci\u00f3n mencionada en la l\u00ednea Correcciones para asegurarse de que la asignaci\u00f3n y el borrado de la estructura de multidifusi\u00f3n est\u00e9n bloqueados. ERROR: KASAN: use-after-free en ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [en l\u00ednea] ERROR: KASAN: use-after-free en ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c: 579 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88801bb74b00 mediante la tarea syz-executor.1/25529 CPU: 0 PID: 25529 Comm: syz-executor.1 No contaminado 5.16.0-rc7-syzkaller #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan /report.c:247 __kasan_report mm/kasan/report.c:433 [en l\u00ednea] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [en l\u00ednea] ucma_destroy_private_ctx+0x914/0xb70 controladores/infiniband/core/ucma.c:579 ucma_destroy_id+0x1e6/0x280 controladores/infiniband/core/ucma.c:614 ucma_write+0x25c/0x350 controladores/infiniband/core/ucma.c:1732 vfs_write+ 0x28e/0xae0 fs/read_write.c:588 ksys_write+0x1ee/0x250 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [en l\u00ednea] do_syscall_64+0x35/0xb0 arch/x86/entry/common. c:80 Entry_SYSCALL_64_after_hwframe+0x44/0xae Actualmente, la b\u00fasqueda de xarray puede tocar un mc que se libera simult\u00e1neamente ya que xa_for_each() no est\u00e1 rodeado por ning\u00fan candado. En lugar de mantener el bloqueo durante un escaneo completo, mant\u00e9ngalo solo para los elementos afectados, que generalmente son una lista 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:01:22+00:00",
      "cve": "CVE-2022-48726",
      "id": "CVE-2022-48726",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/ucma: Protect mc during concurrent multicast leaves",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48726.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-11T02:34:26Z",
      "cve": "CVE-2022-48726",
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      "initial_release_date": "2024-06-22T04:09:25Z",
      "product_status:known_affected": "324",
      "product_status:known_not_affected": "212",
      "product_status:recommended": "482",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-48726",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-48726.json",
      "version": "56"
    },
    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2022-48726\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-04T09:02:12.526Z\", \"dateReserved\": \"2024-06-20T11:09:39.051Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-20T11:13:15.957Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.