CVE-2024-26750
Vulnerability from cvelistv5
Published
2024-04-04 08:20
Modified
2024-11-05 09:15
Severity ?
Summary
af_unix: Drop oob_skb ref before purging queue in GC.
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:14:13.217Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/6c480d0f131862645d172ca9e25dc152b1a5c3a6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c4c795b21dd23d9514ae1c6646c3fb2c78b5be60"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e9eac260369d0cf57ea53df95427125725507a0d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/43ba9e331559a30000c862eea313248707afa787"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/aa82ac51d63328714645c827775d64dbfd9941f3"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26750",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:51:11.547250Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:53.425Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/unix/garbage.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6c480d0f1318",
              "status": "affected",
              "version": "36f7371de977",
              "versionType": "git"
            },
            {
              "lessThan": "c4c795b21dd2",
              "status": "affected",
              "version": "2a3d40b4025f",
              "versionType": "git"
            },
            {
              "lessThan": "e9eac260369d",
              "status": "affected",
              "version": "69e0f04460f4",
              "versionType": "git"
            },
            {
              "lessThan": "43ba9e331559",
              "status": "affected",
              "version": "cb8890318dde",
              "versionType": "git"
            },
            {
              "lessThan": "aa82ac51d633",
              "status": "affected",
              "version": "25236c91b5ab",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/unix/garbage.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5.15.151",
              "status": "affected",
              "version": "5.15.149",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Drop oob_skb ref before purging queue in GC.\n\nsyzbot reported another task hung in __unix_gc().  [0]\n\nThe current while loop assumes that all of the left candidates\nhave oob_skb and calling kfree_skb(oob_skb) releases the remaining\ncandidates.\n\nHowever, I missed a case that oob_skb has self-referencing fd and\nanother fd and the latter sk is placed before the former in the\ncandidate list.  Then, the while loop never proceeds, resulting\nthe task hung.\n\n__unix_gc() has the same loop just before purging the collected skb,\nso we can call kfree_skb(oob_skb) there and let __skb_queue_purge()\nrelease all inflight sockets.\n\n[0]:\nSending NMI from CPU 0 to CPUs 1:\nNMI backtrace for cpu 1\nCPU: 1 PID: 2784 Comm: kworker/u4:8 Not tainted 6.8.0-rc4-syzkaller-01028-g71b605d32017 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nWorkqueue: events_unbound __unix_gc\nRIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200\nCode: 89 fb e8 23 00 00 00 48 8b 3d 84 f5 1a 0c 48 89 de 5b e9 43 26 57 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 \u003cf3\u003e 0f 1e fa 48 8b 04 24 65 48 8b 0d 90 52 70 7e 65 8b 15 91 52 70\nRSP: 0018:ffffc9000a17fa78 EFLAGS: 00000287\nRAX: ffffffff8a0a6108 RBX: ffff88802b6c2640 RCX: ffff88802c0b3b80\nRDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000\nRBP: ffffc9000a17fbf0 R08: ffffffff89383f1d R09: 1ffff1100ee5ff84\nR10: dffffc0000000000 R11: ffffed100ee5ff85 R12: 1ffff110056d84ee\nR13: ffffc9000a17fae0 R14: 0000000000000000 R15: ffffffff8f47b840\nFS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007ffef5687ff8 CR3: 0000000029b34000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cNMI\u003e\n \u003c/NMI\u003e\n \u003cTASK\u003e\n __unix_gc+0xe69/0xf40 net/unix/garbage.c:343\n process_one_work kernel/workqueue.c:2633 [inline]\n process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706\n worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787\n kthread+0x2ef/0x390 kernel/kthread.c:388\n ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242\n \u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-05T09:15:03.672Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6c480d0f131862645d172ca9e25dc152b1a5c3a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4c795b21dd23d9514ae1c6646c3fb2c78b5be60"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9eac260369d0cf57ea53df95427125725507a0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/43ba9e331559a30000c862eea313248707afa787"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa82ac51d63328714645c827775d64dbfd9941f3"
        }
      ],
      "title": "af_unix: Drop oob_skb ref before purging queue in GC.",
      "x_generator": {
        "engine": "bippy-9e1c9544281a"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26750",
    "datePublished": "2024-04-04T08:20:14.494Z",
    "dateReserved": "2024-02-19T14:20:24.169Z",
    "dateUpdated": "2024-11-05T09:15:03.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26750\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:07.850\",\"lastModified\":\"2024-04-04T14:15:09.620\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: Drop oob_skb ref before purging queue in GC.\\n\\nsyzbot reported another task hung in __unix_gc().  [0]\\n\\nThe current while loop assumes that all of the left candidates\\nhave oob_skb and calling kfree_skb(oob_skb) releases the remaining\\ncandidates.\\n\\nHowever, I missed a case that oob_skb has self-referencing fd and\\nanother fd and the latter sk is placed before the former in the\\ncandidate list.  Then, the while loop never proceeds, resulting\\nthe task hung.\\n\\n__unix_gc() has the same loop just before purging the collected skb,\\nso we can call kfree_skb(oob_skb) there and let __skb_queue_purge()\\nrelease all inflight sockets.\\n\\n[0]:\\nSending NMI from CPU 0 to CPUs 1:\\nNMI backtrace for cpu 1\\nCPU: 1 PID: 2784 Comm: kworker/u4:8 Not tainted 6.8.0-rc4-syzkaller-01028-g71b605d32017 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\\nWorkqueue: events_unbound __unix_gc\\nRIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200\\nCode: 89 fb e8 23 00 00 00 48 8b 3d 84 f5 1a 0c 48 89 de 5b e9 43 26 57 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 \u003cf3\u003e 0f 1e fa 48 8b 04 24 65 48 8b 0d 90 52 70 7e 65 8b 15 91 52 70\\nRSP: 0018:ffffc9000a17fa78 EFLAGS: 00000287\\nRAX: ffffffff8a0a6108 RBX: ffff88802b6c2640 RCX: ffff88802c0b3b80\\nRDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000\\nRBP: ffffc9000a17fbf0 R08: ffffffff89383f1d R09: 1ffff1100ee5ff84\\nR10: dffffc0000000000 R11: ffffed100ee5ff85 R12: 1ffff110056d84ee\\nR13: ffffc9000a17fae0 R14: 0000000000000000 R15: ffffffff8f47b840\\nFS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00007ffef5687ff8 CR3: 0000000029b34000 CR4: 00000000003506f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cNMI\u003e\\n \u003c/NMI\u003e\\n \u003cTASK\u003e\\n __unix_gc+0xe69/0xf40 net/unix/garbage.c:343\\n process_one_work kernel/workqueue.c:2633 [inline]\\n process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706\\n worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787\\n kthread+0x2ef/0x390 kernel/kthread.c:388\\n ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\\n ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: af_unix: elimine la referencia oob_skb antes de purgar la cola en GC. syzbot inform\u00f3 que otra tarea se colg\u00f3 en __unix_gc(). [0] El bucle while actual supone que todos los candidatos restantes tienen oob_skb y llamar a kfree_skb(oob_skb) libera los candidatos restantes. Sin embargo, me perd\u00ed un caso en el que oob_skb tiene fd autorreferenciado y otro fd y el \u00faltimo sk se coloca antes que el primero en la lista de candidatos. Luego, el ciclo while nunca contin\u00faa, lo que provoca que la tarea se bloquee. __unix_gc() tiene el mismo bucle justo antes de purgar el skb recopilado, por lo que podemos llamar a kfree_skb(oob_skb) all\u00ed y dejar que __skb_queue_purge() libere todos los sockets en vuelo. [0]: Env\u00edo de NMI desde la CPU 0 a las CPU 1: seguimiento de NMI para la CPU 1 CPU: 1 PID: 2784 Comm: kworker/u4:8 Not tainted 6.8.0-rc4-syzkaller-01028-g71b605d32017 #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 25/01/2024 Cola de trabajo: events_unbound __unix_gc RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200 C\u00f3digo: 89 fb e8 23 00 00 00 48 8b 3d 84 f5 1a 0c 48 89 de 5b e9 43 26 57 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90  0f 1e fa 48 8b 04 24 65 48 8b 0d 90 5 2 70 7e 65 8b 15 91 52 70 RSP: 0018:ffffc9000a17fa78 EFLAGS: 00000287 RAX: ffffffff8a0a6108 RBX: ffff88802b6c2640 RCX: ffff88802c0b3b80 RDX: 0000000000000000 RSI: 0 000000000000002 RDI: 0000000000000000 RBP: ffffc9000a17fbf0 R08: ffffffff89383f1d R09: 1ffff1100ee5ff84 R10: dffffc0000000000 R11: ffffed100ee5ff85 R12: 1ffff110056d84ee R13: ffffc9000a17fae0 R14: 0000000000000000 R15: ffffffff8f47b840 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffef5687ff8 CR3: 0000000029b34000 CR4: 00000000003506f0 DR0: 00000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas:    __unix_gc+0xe69/0xf40 net/unix/garbage.c:343 proceso _one_work kernel/workqueue.c:2633 [en l\u00ednea] proceso_scheduled_works+ 0x913/0x1420 kernel/workqueue.c:2706 trabajador_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/43ba9e331559a30000c862eea313248707afa787\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6c480d0f131862645d172ca9e25dc152b1a5c3a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa82ac51d63328714645c827775d64dbfd9941f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4c795b21dd23d9514ae1c6646c3fb2c78b5be60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e9eac260369d0cf57ea53df95427125725507a0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading...

Loading...

Loading...

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.