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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.217",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.159",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.91",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.31",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.10",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout\n\nThere is a race condition between l2cap_chan_timeout() and\nl2cap_chan_del(). When we use l2cap_chan_del() to delete the\nchannel, the chan-\u003econn will be set to null. But the conn could\nbe dereferenced again in the mutex_lock() of l2cap_chan_timeout().\nAs a result the null pointer dereference bug will happen. The\nKASAN report triggered by POC is shown below:\n\n[  472.074580] ==================================================================\n[  472.075284] BUG: KASAN: null-ptr-deref in mutex_lock+0x68/0xc0\n[  472.075308] Write of size 8 at addr 0000000000000158 by task kworker/0:0/7\n[  472.075308]\n[  472.075308] CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.9.0-rc5-00356-g78c0094a146b #36\n[  472.075308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu4\n[  472.075308] Workqueue: events l2cap_chan_timeout\n[  472.075308] Call Trace:\n[  472.075308]  \u003cTASK\u003e\n[  472.075308]  dump_stack_lvl+0x137/0x1a0\n[  472.075308]  print_report+0x101/0x250\n[  472.075308]  ? __virt_addr_valid+0x77/0x160\n[  472.075308]  ? mutex_lock+0x68/0xc0\n[  472.075308]  kasan_report+0x139/0x170\n[  472.075308]  ? mutex_lock+0x68/0xc0\n[  472.075308]  kasan_check_range+0x2c3/0x2e0\n[  472.075308]  mutex_lock+0x68/0xc0\n[  472.075308]  l2cap_chan_timeout+0x181/0x300\n[  472.075308]  process_one_work+0x5d2/0xe00\n[  472.075308]  worker_thread+0xe1d/0x1660\n[  472.075308]  ? pr_cont_work+0x5e0/0x5e0\n[  472.075308]  kthread+0x2b7/0x350\n[  472.075308]  ? pr_cont_work+0x5e0/0x5e0\n[  472.075308]  ? kthread_blkcg+0xd0/0xd0\n[  472.075308]  ret_from_fork+0x4d/0x80\n[  472.075308]  ? kthread_blkcg+0xd0/0xd0\n[  472.075308]  ret_from_fork_asm+0x11/0x20\n[  472.075308]  \u003c/TASK\u003e\n[  472.075308] ==================================================================\n[  472.094860] Disabling lock debugging due to kernel taint\n[  472.096136] BUG: kernel NULL pointer dereference, address: 0000000000000158\n[  472.096136] #PF: supervisor write access in kernel mode\n[  472.096136] #PF: error_code(0x0002) - not-present page\n[  472.096136] PGD 0 P4D 0\n[  472.096136] Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI\n[  472.096136] CPU: 0 PID: 7 Comm: kworker/0:0 Tainted: G    B              6.9.0-rc5-00356-g78c0094a146b #36\n[  472.096136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu4\n[  472.096136] Workqueue: events l2cap_chan_timeout\n[  472.096136] RIP: 0010:mutex_lock+0x88/0xc0\n[  472.096136] Code: be 08 00 00 00 e8 f8 23 1f fd 4c 89 f7 be 08 00 00 00 e8 eb 23 1f fd 42 80 3c 23 00 74 08 48 88\n[  472.096136] RSP: 0018:ffff88800744fc78 EFLAGS: 00000246\n[  472.096136] RAX: 0000000000000000 RBX: 1ffff11000e89f8f RCX: ffffffff8457c865\n[  472.096136] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88800744fc78\n[  472.096136] RBP: 0000000000000158 R08: ffff88800744fc7f R09: 1ffff11000e89f8f\n[  472.096136] R10: dffffc0000000000 R11: ffffed1000e89f90 R12: dffffc0000000000\n[  472.096136] R13: 0000000000000158 R14: ffff88800744fc78 R15: ffff888007405a00\n[  472.096136] FS:  0000000000000000(0000) GS:ffff88806d200000(0000) knlGS:0000000000000000\n[  472.096136] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  472.096136] CR2: 0000000000000158 CR3: 000000000da32000 CR4: 00000000000006f0\n[  472.096136] Call Trace:\n[  472.096136]  \u003cTASK\u003e\n[  472.096136]  ? __die_body+0x8d/0xe0\n[  472.096136]  ? page_fault_oops+0x6b8/0x9a0\n[  472.096136]  ? kernelmode_fixup_or_oops+0x20c/0x2a0\n[  472.096136]  ? do_user_addr_fault+0x1027/0x1340\n[  472.096136]  ? _printk+0x7a/0xa0\n[  472.096136]  ? mutex_lock+0x68/0xc0\n[  472.096136]  ? add_taint+0x42/0xd0\n[  472.096136]  ? exc_page_fault+0x6a/0x1b0\n[  472.096136]  ? asm_exc_page_fault+0x26/0x30\n[  472.096136]  ? mutex_lock+0x75/0xc0\n[  472.096136]  ? mutex_lock+0x88/0xc0\n[  472.096136]  ? mutex_lock+0x75/0xc0\n[  472.096136]  l2cap_chan_timeo\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:10:16.347Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e137e2ba96e51902dc2878131823a96bf8e638ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/6466ee65e5b27161c846c73ef407f49dfa1bd1d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/06acb75e7ed600d0bbf7bff5628aa8f24a97978c"
        },
        {
          "url": "https://git.kernel.org/stable/c/e97e16433eb4533083b096a3824b93a5ca3aee79"
        },
        {
          "url": "https://git.kernel.org/stable/c/8960ff650aec70485b40771cd8e6e8c4cb467d33"
        },
        {
          "url": "https://git.kernel.org/stable/c/955b5b6c54d95b5e7444dfc81c95c8e013f27ac0"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb86f955488c39526534211f2610e48a5cf8ead4"
        },
        {
          "url": "https://git.kernel.org/stable/c/adf0398cee86643b8eacde95f17d073d022f782c"
        }
      ],
      "title": "Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-27399",
    "datePublished": "2024-05-13T10:24:57.045Z",
    "dateReserved": "2024-02-25T13:47:42.681Z",
    "dateUpdated": "2026-05-11T20:10:16.347Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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              "userInteraction": "NONE",
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/net/qeth_core_main.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "version": "6.4.10",
              "versionType": "semver"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/s390/net/qeth_core_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.159",
                  "versionStartIncluding": "5.15.126",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.91",
                  "versionStartIncluding": "6.1.45",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.31",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.10",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
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                {
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/qeth: Fix kernel panic after setting hsuid\n\nSymptom:\nWhen the hsuid attribute is set for the first time on an IQD Layer3\ndevice while the corresponding network interface is already UP,\nthe kernel will try to execute a napi function pointer that is NULL.\n\nExample:\n---------------------------------------------------------------------------\n[ 2057.572696] illegal operation: 0001 ilc:1 [#1] SMP\n[ 2057.572702] Modules linked in: af_iucv qeth_l3 zfcp scsi_transport_fc sunrpc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6\nnft_reject nft_ct nf_tables_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables libcrc32c nfnetlink ghash_s390 prng xts aes_s390 des_s390 de\ns_generic sha3_512_s390 sha3_256_s390 sha512_s390 vfio_ccw vfio_mdev mdev vfio_iommu_type1 eadm_sch vfio ext4 mbcache jbd2 qeth_l2 bridge stp llc dasd_eckd_mod qeth dasd_mod\n qdio ccwgroup pkey zcrypt\n[ 2057.572739] CPU: 6 PID: 60182 Comm: stress_client Kdump: loaded Not tainted 4.18.0-541.el8.s390x #1\n[ 2057.572742] Hardware name: IBM 3931 A01 704 (LPAR)\n[ 2057.572744] Krnl PSW : 0704f00180000000 0000000000000002 (0x2)\n[ 2057.572748]            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:3 PM:0 RI:0 EA:3\n[ 2057.572751] Krnl GPRS: 0000000000000004 0000000000000000 00000000a3b008d8 0000000000000000\n[ 2057.572754]            00000000a3b008d8 cb923a29c779abc5 0000000000000000 00000000814cfd80\n[ 2057.572756]            000000000000012c 0000000000000000 00000000a3b008d8 00000000a3b008d8\n[ 2057.572758]            00000000bab6d500 00000000814cfd80 0000000091317e46 00000000814cfc68\n[ 2057.572762] Krnl Code:#0000000000000000: 0000                illegal\n                         \u003e0000000000000002: 0000                illegal\n                          0000000000000004: 0000                illegal\n                          0000000000000006: 0000                illegal\n                          0000000000000008: 0000                illegal\n                          000000000000000a: 0000                illegal\n                          000000000000000c: 0000                illegal\n                          000000000000000e: 0000                illegal\n[ 2057.572800] Call Trace:\n[ 2057.572801] ([\u003c00000000ec639700\u003e] 0xec639700)\n[ 2057.572803]  [\u003c00000000913183e2\u003e] net_rx_action+0x2ba/0x398\n[ 2057.572809]  [\u003c0000000091515f76\u003e] __do_softirq+0x11e/0x3a0\n[ 2057.572813]  [\u003c0000000090ce160c\u003e] do_softirq_own_stack+0x3c/0x58\n[ 2057.572817] ([\u003c0000000090d2cbd6\u003e] do_softirq.part.1+0x56/0x60)\n[ 2057.572822]  [\u003c0000000090d2cc60\u003e] __local_bh_enable_ip+0x80/0x98\n[ 2057.572825]  [\u003c0000000091314706\u003e] __dev_queue_xmit+0x2be/0xd70\n[ 2057.572827]  [\u003c000003ff803dd6d6\u003e] afiucv_hs_send+0x24e/0x300 [af_iucv]\n[ 2057.572830]  [\u003c000003ff803dd88a\u003e] iucv_send_ctrl+0x102/0x138 [af_iucv]\n[ 2057.572833]  [\u003c000003ff803de72a\u003e] iucv_sock_connect+0x37a/0x468 [af_iucv]\n[ 2057.572835]  [\u003c00000000912e7e90\u003e] __sys_connect+0xa0/0xd8\n[ 2057.572839]  [\u003c00000000912e9580\u003e] sys_socketcall+0x228/0x348\n[ 2057.572841]  [\u003c0000000091514e1a\u003e] system_call+0x2a6/0x2c8\n[ 2057.572843] Last Breaking-Event-Address:\n[ 2057.572844]  [\u003c0000000091317e44\u003e] __napi_poll+0x4c/0x1d8\n[ 2057.572846]\n[ 2057.572847] Kernel panic - not syncing: Fatal exception in interrupt\n-------------------------------------------------------------------------------------------\n\nAnalysis:\nThere is one napi structure per out_q: card-\u003eqdio.out_qs[i].napi\nThe napi.poll functions are set during qeth_open().\n\nSince\ncommit 1cfef80d4c2b (\"s390/qeth: Don\u0027t call dev_close/dev_open (DOWN/UP)\")\nqeth_set_offline()/qeth_set_online() no longer call dev_close()/\ndev_open(). So if qeth_free_qdio_queues() cleared\ncard-\u003eqdio.out_qs[i].napi.poll while the network interface was UP and the\ncard was offline, they are not set again.\n\nReproduction:\nchzdev -e $devno layer2=0\nip link set dev $network_interface up\necho 0 \u003e /sys/bus/ccw\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.162",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.95",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.10",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: fix kernel crash problem in concurrent scenario\n\nWhen link status change, the nic driver need to notify the roce\ndriver to handle this event, but at this time, the roce driver\nmay uninit, then cause kernel crash.\n\nTo fix the problem, when link status change, need to check\nwhether the roce registered, and when uninit, need to wait link\nupdate finish."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is a PCI NIC driver\u0027s link-status handler reached via a local `SIOCETHTOOL`/ethtool-netlink call or the driver\u0027s own workqueue; no remote peer data is parsed and both the trigger and any heap grooming require local system access.\nAC:H - Exploitation requires winning a race between an in-flight `hclge_update_link_status()` and RoCE client teardown, and the teardown side is only initiated by module unload, driver unbind, hot-unplug, or device reset \u2014 an administrative event the attacker cannot cause, even though they can poll `ETHTOOL_GLINK` arbitrarily fast to hold the other side open.\nPR:L - `ETHTOOL_GLINK` is explicitly exempt from CAP_NET_ADMIN in `net/ethtool/ioctl.c`, so any unprivileged local user can repeatedly drive `hclge_get_status()` \u2192 `hclge_update_link_status()` and be positioned to groom the freed vmalloc\u0027d module region.\nUI:N - No victim must open a file, mount media, or otherwise be induced to act \u2014 the link update fires autonomously from the ~1 Hz periodic service task and from the attacker\u0027s own ethtool poll.\nS:U - The use-after-free corrupts kernel memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - This is a use-after-free \u2014 the stale `rclient` is dereferenced in freed module memory and, where the RoCE callback exists, a freed `struct hns_roce_dev` is read via `ib_dispatch_port_state_event()`, giving an attacker who controls the reallocated contents a path to kernel memory disclosure.\nI:H - The UAF culminates in an indirect call through a function pointer read out of freed memory (`rclient-\u003eops-\u003elink_status_change`), a control-flow hijack primitive if the freed module pages are reclaimed with attacker-influenced data; the IB event dispatch also writes into the freed device structure.\nA:H - The reported and expected symptom is exactly a kernel crash \u2014 the commit is titled \"fix kernel crash problem in concurrent scenario\" \u2014 from dereferencing unmapped/freed module memory, which panics the system."
            }
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:33:50.288Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/62b5dfb67bfa8bd0301bf3442004563495f9ee48"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d0007f7b69d684879a0f598a042e40244d3cf63"
        },
        {
          "url": "https://git.kernel.org/stable/c/689de7c3bfc7d47e0eacc641c4ce4a0f579aeefa"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2c5024b771cd1dd8175d5f6949accfadbab7edd"
        },
        {
          "url": "https://git.kernel.org/stable/c/12cda920212a49fa22d9e8b9492ac4ea013310a4"
        }
      ],
      "title": "net: hns3: fix kernel crash problem in concurrent scenario",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-39507",
    "datePublished": "2024-07-12T12:20:38.954Z",
    "dateReserved": "2024-06-25T14:23:23.752Z",
    "dateUpdated": "2026-08-05T11:33:50.288Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}