scsi: qla2xxx: Fix use after free on unload

{
  "id": "d59753ad9e84ade9ea82b2307a83cb337f54700c3618cf3af79b00dbb743f850",
  "url": "https://osv.dev/vulnerability/CVE-2024-56623",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: qla2xxx: Fix use after free on unload",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix use after free on unload System crash is observed with stack trace warning of use after free. There are 2 signals to tell dpc_thread to terminate (UNLOADING flag and kthread_stop). On setting the UNLOADING flag when dpc_thread happens to run at the time and sees the flag, this causes dpc_thread to exit and clean up itself. When kthread_stop is called for final cleanup, this causes use after free. Remove UNLOADING signal to terminate dpc_thread. Use the kthread_stop as the main signal to exit dpc_thread. [596663.812935] kernel BUG at mm/slub.c:294! [596663.812950] invalid opcode: 0000 [#1] SMP PTI [596663.812957] CPU: 13 PID: 1475935 Comm: rmmod Kdump: loaded Tainted: G IOE --------- - - 4.18.0-240.el8.x86_64 #1 [596663.812960] Hardware name: HP ProLiant DL380p Gen8, BIOS P70 08/20/2012 [596663.812974] RIP: 0010:__slab_free+0x17d/0x360 ... [596663.813008] Call Trace: [596663.813022] ? __dentry_kill+0x121/0x170 [596663.813030] ? _cond_resched+0x15/0x30 [596663.813034] ? _cond_resched+0x15/0x30 [596663.813039] ? wait_for_completion+0x35/0x190 [596663.813048] ? try_to_wake_up+0x63/0x540 [596663.813055] free_task+0x5a/0x60 [596663.813061] kthread_stop+0xf3/0x100 [596663.813103] qla2x00_remove_one+0x284/0x440 [qla2xxx]",
    "evidence": "osv:CVE-2024-56623",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.231",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.174",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.120",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.66",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-56623",
      "aliases": [
        "CVE-2024-56623"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0"
                },
                {
                  "fixed": "12f04fc8580eafb0510f805749553eb6213f323e"
                },
                {
                  "fixed": "ca36d9d53745d5ec8946ef85006d4da605ea7c54"
                },
                {
                  "fixed": "b3e6f25176f248762a24d25ab8cf8c5e90874f80"
                },
                {
                  "fixed": "15369e774f27ec790f207de87c0b541e3f90b22d"
                },
                {
                  "fixed": "6abf16d3c915b2feb68c1c8b25fcb71b13f98478"
                },
                {
                  "fixed": "07c903db0a2ff84b68efa1a74a4de353ea591eb0"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56623.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.8.0"
                },
                {
                  "fixed": "5.10.231"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.174"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.120"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.66"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56623.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.492345333Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07c903db0a2ff84b68efa1a74a4de353ea591eb0",
        "https://git.kernel.org/stable/c/12f04fc8580eafb0510f805749553eb6213f323e",
        "https://git.kernel.org/stable/c/15369e774f27ec790f207de87c0b541e3f90b22d",
        "https://git.kernel.org/stable/c/6abf16d3c915b2feb68c1c8b25fcb71b13f98478",
        "https://git.kernel.org/stable/c/b3e6f25176f248762a24d25ab8cf8c5e90874f80",
        "https://git.kernel.org/stable/c/ca36d9d53745d5ec8946ef85006d4da605ea7c54",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56623.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-56623",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56623.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-56623",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502693,
  "published_at": "2024-12-27T14:51:26.484+00:00"
}