CVE-2025-38211 (GCVE-0-2025-38211)

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2026-05-11 21:23
VLAI
Title
RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction The commit 59c68ac31e15 ("iw_cm: free cm_id resources on the last deref") simplified cm_id resource management by freeing cm_id once all references to the cm_id were removed. The references are removed either upon completion of iw_cm event handlers or when the application destroys the cm_id. This commit introduced the use-after-free condition where cm_id_private object could still be in use by event handler works during the destruction of cm_id. The commit aee2424246f9 ("RDMA/iwcm: Fix a use-after-free related to destroying CM IDs") addressed this use-after- free by flushing all pending works at the cm_id destruction. However, still another use-after-free possibility remained. It happens with the work objects allocated for each cm_id_priv within alloc_work_entries() during cm_id creation, and subsequently freed in dealloc_work_entries() once all references to the cm_id are removed. If the cm_id's last reference is decremented in the event handler work, the work object for the work itself gets removed, and causes the use- after-free BUG below: BUG: KASAN: slab-use-after-free in __pwq_activate_work+0x1ff/0x250 Read of size 8 at addr ffff88811f9cf800 by task kworker/u16:1/147091 CPU: 2 UID: 0 PID: 147091 Comm: kworker/u16:1 Not tainted 6.15.0-rc2+ #27 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014 Workqueue: 0x0 (iw_cm_wq) Call Trace: <TASK> dump_stack_lvl+0x6a/0x90 print_report+0x174/0x554 ? __virt_addr_valid+0x208/0x430 ? __pwq_activate_work+0x1ff/0x250 kasan_report+0xae/0x170 ? __pwq_activate_work+0x1ff/0x250 __pwq_activate_work+0x1ff/0x250 pwq_dec_nr_in_flight+0x8c5/0xfb0 process_one_work+0xc11/0x1460 ? __pfx_process_one_work+0x10/0x10 ? assign_work+0x16c/0x240 worker_thread+0x5ef/0xfd0 ? __pfx_worker_thread+0x10/0x10 kthread+0x3b0/0x770 ? __pfx_kthread+0x10/0x10 ? rcu_is_watching+0x11/0xb0 ? _raw_spin_unlock_irq+0x24/0x50 ? rcu_is_watching+0x11/0xb0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x30/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 147416: kasan_save_stack+0x2c/0x50 kasan_save_track+0x10/0x30 __kasan_kmalloc+0xa6/0xb0 alloc_work_entries+0xa9/0x260 [iw_cm] iw_cm_connect+0x23/0x4a0 [iw_cm] rdma_connect_locked+0xbfd/0x1920 [rdma_cm] nvme_rdma_cm_handler+0x8e5/0x1b60 [nvme_rdma] cma_cm_event_handler+0xae/0x320 [rdma_cm] cma_work_handler+0x106/0x1b0 [rdma_cm] process_one_work+0x84f/0x1460 worker_thread+0x5ef/0xfd0 kthread+0x3b0/0x770 ret_from_fork+0x30/0x70 ret_from_fork_asm+0x1a/0x30 Freed by task 147091: kasan_save_stack+0x2c/0x50 kasan_save_track+0x10/0x30 kasan_save_free_info+0x37/0x60 __kasan_slab_free+0x4b/0x70 kfree+0x13a/0x4b0 dealloc_work_entries+0x125/0x1f0 [iw_cm] iwcm_deref_id+0x6f/0xa0 [iw_cm] cm_work_handler+0x136/0x1ba0 [iw_cm] process_one_work+0x84f/0x1460 worker_thread+0x5ef/0xfd0 kthread+0x3b0/0x770 ret_from_fork+0x30/0x70 ret_from_fork_asm+0x1a/0x30 Last potentially related work creation: kasan_save_stack+0x2c/0x50 kasan_record_aux_stack+0xa3/0xb0 __queue_work+0x2ff/0x1390 queue_work_on+0x67/0xc0 cm_event_handler+0x46a/0x820 [iw_cm] siw_cm_upcall+0x330/0x650 [siw] siw_cm_work_handler+0x6b9/0x2b20 [siw] process_one_work+0x84f/0x1460 worker_thread+0x5ef/0xfd0 kthread+0x3b0/0x770 ret_from_fork+0x30/0x70 ret_from_fork_asm+0x1a/0x30 This BUG is reproducible by repeating the blktests test case nvme/061 for the rdma transport and the siw driver. To avoid the use-after-free of cm_id_private work objects, ensure that the last reference to the cm_id is decremented not in the event handler works, but in the cm_id destruction context. For that purpose, mo ---truncated---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < 013dcdf6f03bcedbaf1669e3db71c34a197715b2 (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < bf7eff5e3a36c54bbe8aff7fd6dd7c07490b81c5 (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < 3b4a50d733acad6831f6bd9288a76a80f70650ac (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < 78381dc8a6b61c9bb9987d37b4d671b99767c4a1 (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < 23a707bbcbea468eedb398832eeb7e8e0ceafd21 (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < 764c9f69beabef8bdc651a7746c59f7a340d104f (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < fd960b5ddf4faf00da43babdd3acda68842e1f6a (git)
Affected: 59c68ac31e15ad09d2cb04734e3c8c544a95f8d4 , < 6883b680e703c6b2efddb4e7a8d891ce1803d06b (git)
Create a notification for this product.
Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.95 , ≤ 6.6.* (semver)
Unaffected: 6.12.35 , ≤ 6.12.* (semver)
Unaffected: 6.15.4 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:35:29.579Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/iwcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "013dcdf6f03bcedbaf1669e3db71c34a197715b2",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "bf7eff5e3a36c54bbe8aff7fd6dd7c07490b81c5",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "3b4a50d733acad6831f6bd9288a76a80f70650ac",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "78381dc8a6b61c9bb9987d37b4d671b99767c4a1",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "23a707bbcbea468eedb398832eeb7e8e0ceafd21",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "764c9f69beabef8bdc651a7746c59f7a340d104f",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "fd960b5ddf4faf00da43babdd3acda68842e1f6a",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            },
            {
              "lessThan": "6883b680e703c6b2efddb4e7a8d891ce1803d06b",
              "status": "affected",
              "version": "59c68ac31e15ad09d2cb04734e3c8c544a95f8d4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/iwcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.240",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.186",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.296",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.240",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.186",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.142",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.95",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.35",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.4",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/iwcm: Fix use-after-free of work objects after cm_id destruction\n\nThe commit 59c68ac31e15 (\"iw_cm: free cm_id resources on the last\nderef\") simplified cm_id resource management by freeing cm_id once all\nreferences to the cm_id were removed. The references are removed either\nupon completion of iw_cm event handlers or when the application destroys\nthe cm_id. This commit introduced the use-after-free condition where\ncm_id_private object could still be in use by event handler works during\nthe destruction of cm_id. The commit aee2424246f9 (\"RDMA/iwcm: Fix a\nuse-after-free related to destroying CM IDs\") addressed this use-after-\nfree by flushing all pending works at the cm_id destruction.\n\nHowever, still another use-after-free possibility remained. It happens\nwith the work objects allocated for each cm_id_priv within\nalloc_work_entries() during cm_id creation, and subsequently freed in\ndealloc_work_entries() once all references to the cm_id are removed.\nIf the cm_id\u0027s last reference is decremented in the event handler work,\nthe work object for the work itself gets removed, and causes the use-\nafter-free BUG below:\n\n  BUG: KASAN: slab-use-after-free in __pwq_activate_work+0x1ff/0x250\n  Read of size 8 at addr ffff88811f9cf800 by task kworker/u16:1/147091\n\n  CPU: 2 UID: 0 PID: 147091 Comm: kworker/u16:1 Not tainted 6.15.0-rc2+ #27 PREEMPT(voluntary)\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014\n  Workqueue:  0x0 (iw_cm_wq)\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x6a/0x90\n   print_report+0x174/0x554\n   ? __virt_addr_valid+0x208/0x430\n   ? __pwq_activate_work+0x1ff/0x250\n   kasan_report+0xae/0x170\n   ? __pwq_activate_work+0x1ff/0x250\n   __pwq_activate_work+0x1ff/0x250\n   pwq_dec_nr_in_flight+0x8c5/0xfb0\n   process_one_work+0xc11/0x1460\n   ? __pfx_process_one_work+0x10/0x10\n   ? assign_work+0x16c/0x240\n   worker_thread+0x5ef/0xfd0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x3b0/0x770\n   ? __pfx_kthread+0x10/0x10\n   ? rcu_is_watching+0x11/0xb0\n   ? _raw_spin_unlock_irq+0x24/0x50\n   ? rcu_is_watching+0x11/0xb0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x30/0x70\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 147416:\n   kasan_save_stack+0x2c/0x50\n   kasan_save_track+0x10/0x30\n   __kasan_kmalloc+0xa6/0xb0\n   alloc_work_entries+0xa9/0x260 [iw_cm]\n   iw_cm_connect+0x23/0x4a0 [iw_cm]\n   rdma_connect_locked+0xbfd/0x1920 [rdma_cm]\n   nvme_rdma_cm_handler+0x8e5/0x1b60 [nvme_rdma]\n   cma_cm_event_handler+0xae/0x320 [rdma_cm]\n   cma_work_handler+0x106/0x1b0 [rdma_cm]\n   process_one_work+0x84f/0x1460\n   worker_thread+0x5ef/0xfd0\n   kthread+0x3b0/0x770\n   ret_from_fork+0x30/0x70\n   ret_from_fork_asm+0x1a/0x30\n\n  Freed by task 147091:\n   kasan_save_stack+0x2c/0x50\n   kasan_save_track+0x10/0x30\n   kasan_save_free_info+0x37/0x60\n   __kasan_slab_free+0x4b/0x70\n   kfree+0x13a/0x4b0\n   dealloc_work_entries+0x125/0x1f0 [iw_cm]\n   iwcm_deref_id+0x6f/0xa0 [iw_cm]\n   cm_work_handler+0x136/0x1ba0 [iw_cm]\n   process_one_work+0x84f/0x1460\n   worker_thread+0x5ef/0xfd0\n   kthread+0x3b0/0x770\n   ret_from_fork+0x30/0x70\n   ret_from_fork_asm+0x1a/0x30\n\n  Last potentially related work creation:\n   kasan_save_stack+0x2c/0x50\n   kasan_record_aux_stack+0xa3/0xb0\n   __queue_work+0x2ff/0x1390\n   queue_work_on+0x67/0xc0\n   cm_event_handler+0x46a/0x820 [iw_cm]\n   siw_cm_upcall+0x330/0x650 [siw]\n   siw_cm_work_handler+0x6b9/0x2b20 [siw]\n   process_one_work+0x84f/0x1460\n   worker_thread+0x5ef/0xfd0\n   kthread+0x3b0/0x770\n   ret_from_fork+0x30/0x70\n   ret_from_fork_asm+0x1a/0x30\n\nThis BUG is reproducible by repeating the blktests test case nvme/061\nfor the rdma transport and the siw driver.\n\nTo avoid the use-after-free of cm_id_private work objects, ensure that\nthe last reference to the cm_id is decremented not in the event handler\nworks, but in the cm_id destruction context. For that purpose, mo\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:23:24.277Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/013dcdf6f03bcedbaf1669e3db71c34a197715b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf7eff5e3a36c54bbe8aff7fd6dd7c07490b81c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b4a50d733acad6831f6bd9288a76a80f70650ac"
        },
        {
          "url": "https://git.kernel.org/stable/c/78381dc8a6b61c9bb9987d37b4d671b99767c4a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/23a707bbcbea468eedb398832eeb7e8e0ceafd21"
        },
        {
          "url": "https://git.kernel.org/stable/c/764c9f69beabef8bdc651a7746c59f7a340d104f"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd960b5ddf4faf00da43babdd3acda68842e1f6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6883b680e703c6b2efddb4e7a8d891ce1803d06b"
        }
      ],
      "title": "RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38211",
    "datePublished": "2025-07-04T13:37:30.307Z",
    "dateReserved": "2025-04-16T04:51:23.994Z",
    "dateUpdated": "2026-05-11T21:23:24.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-38211",
      "date": "2026-06-03",
      "epss": "0.00063",
      "percentile": "0.19749"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38211\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-04T14:15:29.337\",\"lastModified\":\"2025-12-18T21:12:10.963\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/iwcm: Fix use-after-free of work objects after cm_id destruction\\n\\nThe commit 59c68ac31e15 (\\\"iw_cm: free cm_id resources on the last\\nderef\\\") simplified cm_id resource management by freeing cm_id once all\\nreferences to the cm_id were removed. The references are removed either\\nupon completion of iw_cm event handlers or when the application destroys\\nthe cm_id. This commit introduced the use-after-free condition where\\ncm_id_private object could still be in use by event handler works during\\nthe destruction of cm_id. The commit aee2424246f9 (\\\"RDMA/iwcm: Fix a\\nuse-after-free related to destroying CM IDs\\\") addressed this use-after-\\nfree by flushing all pending works at the cm_id destruction.\\n\\nHowever, still another use-after-free possibility remained. It happens\\nwith the work objects allocated for each cm_id_priv within\\nalloc_work_entries() during cm_id creation, and subsequently freed in\\ndealloc_work_entries() once all references to the cm_id are removed.\\nIf the cm_id\u0027s last reference is decremented in the event handler work,\\nthe work object for the work itself gets removed, and causes the use-\\nafter-free BUG below:\\n\\n  BUG: KASAN: slab-use-after-free in __pwq_activate_work+0x1ff/0x250\\n  Read of size 8 at addr ffff88811f9cf800 by task kworker/u16:1/147091\\n\\n  CPU: 2 UID: 0 PID: 147091 Comm: kworker/u16:1 Not tainted 6.15.0-rc2+ #27 PREEMPT(voluntary)\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014\\n  Workqueue:  0x0 (iw_cm_wq)\\n  Call Trace:\\n   \u003cTASK\u003e\\n   dump_stack_lvl+0x6a/0x90\\n   print_report+0x174/0x554\\n   ? __virt_addr_valid+0x208/0x430\\n   ? __pwq_activate_work+0x1ff/0x250\\n   kasan_report+0xae/0x170\\n   ? __pwq_activate_work+0x1ff/0x250\\n   __pwq_activate_work+0x1ff/0x250\\n   pwq_dec_nr_in_flight+0x8c5/0xfb0\\n   process_one_work+0xc11/0x1460\\n   ? __pfx_process_one_work+0x10/0x10\\n   ? assign_work+0x16c/0x240\\n   worker_thread+0x5ef/0xfd0\\n   ? __pfx_worker_thread+0x10/0x10\\n   kthread+0x3b0/0x770\\n   ? __pfx_kthread+0x10/0x10\\n   ? rcu_is_watching+0x11/0xb0\\n   ? _raw_spin_unlock_irq+0x24/0x50\\n   ? rcu_is_watching+0x11/0xb0\\n   ? __pfx_kthread+0x10/0x10\\n   ret_from_fork+0x30/0x70\\n   ? __pfx_kthread+0x10/0x10\\n   ret_from_fork_asm+0x1a/0x30\\n   \u003c/TASK\u003e\\n\\n  Allocated by task 147416:\\n   kasan_save_stack+0x2c/0x50\\n   kasan_save_track+0x10/0x30\\n   __kasan_kmalloc+0xa6/0xb0\\n   alloc_work_entries+0xa9/0x260 [iw_cm]\\n   iw_cm_connect+0x23/0x4a0 [iw_cm]\\n   rdma_connect_locked+0xbfd/0x1920 [rdma_cm]\\n   nvme_rdma_cm_handler+0x8e5/0x1b60 [nvme_rdma]\\n   cma_cm_event_handler+0xae/0x320 [rdma_cm]\\n   cma_work_handler+0x106/0x1b0 [rdma_cm]\\n   process_one_work+0x84f/0x1460\\n   worker_thread+0x5ef/0xfd0\\n   kthread+0x3b0/0x770\\n   ret_from_fork+0x30/0x70\\n   ret_from_fork_asm+0x1a/0x30\\n\\n  Freed by task 147091:\\n   kasan_save_stack+0x2c/0x50\\n   kasan_save_track+0x10/0x30\\n   kasan_save_free_info+0x37/0x60\\n   __kasan_slab_free+0x4b/0x70\\n   kfree+0x13a/0x4b0\\n   dealloc_work_entries+0x125/0x1f0 [iw_cm]\\n   iwcm_deref_id+0x6f/0xa0 [iw_cm]\\n   cm_work_handler+0x136/0x1ba0 [iw_cm]\\n   process_one_work+0x84f/0x1460\\n   worker_thread+0x5ef/0xfd0\\n   kthread+0x3b0/0x770\\n   ret_from_fork+0x30/0x70\\n   ret_from_fork_asm+0x1a/0x30\\n\\n  Last potentially related work creation:\\n   kasan_save_stack+0x2c/0x50\\n   kasan_record_aux_stack+0xa3/0xb0\\n   __queue_work+0x2ff/0x1390\\n   queue_work_on+0x67/0xc0\\n   cm_event_handler+0x46a/0x820 [iw_cm]\\n   siw_cm_upcall+0x330/0x650 [siw]\\n   siw_cm_work_handler+0x6b9/0x2b20 [siw]\\n   process_one_work+0x84f/0x1460\\n   worker_thread+0x5ef/0xfd0\\n   kthread+0x3b0/0x770\\n   ret_from_fork+0x30/0x70\\n   ret_from_fork_asm+0x1a/0x30\\n\\nThis BUG is reproducible by repeating the blktests test case nvme/061\\nfor the rdma transport and the siw driver.\\n\\nTo avoid the use-after-free of cm_id_private work objects, ensure that\\nthe last reference to the cm_id is decremented not in the event handler\\nworks, but in the cm_id destruction context. For that purpose, mo\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/iwcm: Correcci\u00f3n del use-after-free de objetos de trabajo despu\u00e9s de la destrucci\u00f3n de cm_id El commit 59c68ac31e15 (\\\"iw_cm: liberar recursos de cm_id en la \u00faltima desreferencia\\\") simplific\u00f3 la gesti\u00f3n de recursos de cm_id al liberar cm_id una vez que se eliminaron todas las referencias a cm_id. Las referencias se eliminan al completarse los controladores de eventos iw_cm o cuando la aplicaci\u00f3n destruye cm_id. Este commit introdujo la condici\u00f3n de use-after-free donde el objeto cm_id_private a\u00fan podr\u00eda estar en uso por los controladores de eventos durante la destrucci\u00f3n de cm_id. El commit aee2424246f9 (\\\"RDMA/iwcm: Correcci\u00f3n de un use-after-free relacionado con la destrucci\u00f3n de los ID de CM\\\") abord\u00f3 este use-after-free al vaciar todos los trabajos pendientes en la destrucci\u00f3n de cm_id. Sin embargo, a\u00fan quedaba otra posibilidad de use-after-free. Esto sucede con los objetos de trabajo asignados para cada cm_id_priv dentro de alloc_work_entries() durante la creaci\u00f3n de cm_id, y posteriormente se liberan en dealloc_work_entries() una vez que se eliminan todas las referencias a cm_id. Si la \u00faltima referencia de cm_id se decrementa en el manejador de eventos work, el objeto de trabajo para el trabajo en s\u00ed se elimina y causa el siguiente ERROR de use-after-free: ERROR: KASAN: slab-use-after-free in __pwq_activate_work+0x1ff/0x250 Read of size 8 at addr ffff88811f9cf800 by task kworker/u16:1/147091 CPU: 2 UID: 0 PID: 147091 Comm: kworker/u16:1 Not tainted 6.15.0-rc2+ #27 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014 Workqueue: 0x0 (iw_cm_wq) Call Trace:  dump_stack_lvl+0x6a/0x90 print_report+0x174/0x554 ? __virt_addr_valid+0x208/0x430 ? __pwq_activate_work+0x1ff/0x250 kasan_report+0xae/0x170 ? __pwq_activate_work+0x1ff/0x250 __pwq_activate_work+0x1ff/0x250 pwq_dec_nr_in_flight+0x8c5/0xfb0 process_one_work+0xc11/0x1460 ? __pfx_process_one_work+0x10/0x10 ? assign_work+0x16c/0x240 worker_thread+0x5ef/0xfd0 ? __pfx_worker_thread+0x10/0x10 kthread+0x3b0/0x770 ? __pfx_kthread+0x10/0x10 ? rcu_is_watching+0x11/0xb0 ? _raw_spin_unlock_irq+0x24/0x50 ? rcu_is_watching+0x11/0xb0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x30/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30  Allocated by task 147416: kasan_save_stack+0x2c/0x50 kasan_save_track+0x10/0x30 __kasan_kmalloc+0xa6/0xb0 alloc_work_entries+0xa9/0x260 [iw_cm] iw_cm_connect+0x23/0x4a0 [iw_cm] rdma_connect_locked+0xbfd/0x1920 [rdma_cm] nvme_rdma_cm_handler+0x8e5/0x1b60 [nvme_rdma] cma_cm_event_handler+0xae/0x320 [rdma_cm] cma_work_handler+0x106/0x1b0 [rdma_cm] process_one_work+0x84f/0x1460 worker_thread+0x5ef/0xfd0 kthread+0x3b0/0x770 ret_from_fork+0x30/0x70 ret_from_fork_asm+0x1a/0x30 Freed by task 147091: kasan_save_stack+0x2c/0x50 kasan_save_track+0x10/0x30 kasan_save_free_info+0x37/0x60 __kasan_slab_free+0x4b/0x70 kfree+0x13a/0x4b0 dealloc_work_entries+0x125/0x1f0 [iw_cm] iwcm_deref_id+0x6f/0xa0 [iw_cm] cm_work_handler+0x136/0x1ba0 [iw_cm] process_one_work+0x84f/0x1460 worker_thread+0x5ef/0xfd0 kthread+0x3b0/0x770 ret_from_fork+0x30/0x70 ret_from_fork_asm+0x1a/0x30 Last potentially related work creation: kasan_save_stack+0x2c/0x50 kasan_record_aux_stack+0xa3/0xb0 __queue_work+0x2ff/0x1390 queue_work_on+0x67/0xc0 cm_event_handler+0x46a/0x820 [iw_cm] siw_cm_upcall+0x330/0x650 [siw] siw_cm_work_handler+0x6b9/0x2b20 [siw] process_one_work+0x84f/0x1460 worker_thread+0x5ef/0xfd0 kthread+0x3b0/0x770 ret_from_fork+0x30/0x70 ret_from_fork_asm+0x1a/0x30 Este error se puede reproducir repitiendo el caso de prueba blktests nvme/061 para el transporte rdma y el controlador siw. Para evitar el uso posterior a la liberaci\u00f3n de objetos de trabajo cm_id_private, aseg\u00farese de que la \u00faltima referencia a cm_id se decremente no en los trabajos del controlador de eventos, sino en el contexto de destrucci\u00f3n de cm_id. Para ello, mo ---truncated---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.8\",\"versionEndExcluding\":\"5.4.296\",\"matchCriteriaId\":\"95A75954-6D0A-452F-BBBC-39406EB09050\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.240\",\"matchCriteriaId\":\"0E73A49A-F9B2-470F-91B2-6FAB6239BDB6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.186\",\"matchCriteriaId\":\"D96F2C0D-0D4A-4658-AD34-D8A626EA422D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.142\",\"matchCriteriaId\":\"459B4E94-FE0E-434D-B782-95E3A5FFC6B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.95\",\"matchCriteriaId\":\"C5E01853-7048-4D78-9479-9AEE41AC8456\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.35\",\"matchCriteriaId\":\"E569FD34-0076-4428-BE17-EECCF867611C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.4\",\"matchCriteriaId\":\"DFD174C5-1AA2-4671-BDDC-1A9FCC753655\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/013dcdf6f03bcedbaf1669e3db71c34a197715b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/23a707bbcbea468eedb398832eeb7e8e0ceafd21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3b4a50d733acad6831f6bd9288a76a80f70650ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6883b680e703c6b2efddb4e7a8d891ce1803d06b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/764c9f69beabef8bdc651a7746c59f7a340d104f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/78381dc8a6b61c9bb9987d37b4d671b99767c4a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bf7eff5e3a36c54bbe8aff7fd6dd7c07490b81c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fd960b5ddf4faf00da43babdd3acda68842e1f6a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"Mailing List\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"Mailing List\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
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.