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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",
      "id": "CVE-2022-48726",
      "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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Rather than hold the lock for\\na full scan hold it only for the effected items, which is usually an empty\\nlist.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.99\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.22\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16.8\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17\", \"versionStartIncluding\": \"5.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-04T09:02:12.526Z\"}}}",
      "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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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.