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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: check folio mapping after unlock in relocate_one_folio()\n\nWhen we call btrfs_read_folio() to bring a folio uptodate, we unlock the\nfolio. The result of that is that a different thread can modify the\nmapping (like remove it with invalidate) before we call folio_lock().\nThis results in an invalid page and we need to try again.\n\nIn particular, if we are relocating concurrently with aborting a\ntransaction, this can result in a crash like the following:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  PGD 0 P4D 0\n  Oops: 0000 [#1] SMP\n  CPU: 76 PID: 1411631 Comm: kworker/u322:5\n  Workqueue: events_unbound btrfs_reclaim_bgs_work\n  RIP: 0010:set_page_extent_mapped+0x20/0xb0\n  RSP: 0018:ffffc900516a7be8 EFLAGS: 00010246\n  RAX: ffffea009e851d08 RBX: ffffea009e0b1880 RCX: 0000000000000000\n  RDX: 0000000000000000 RSI: ffffc900516a7b90 RDI: ffffea009e0b1880\n  RBP: 0000000003573000 R08: 0000000000000001 R09: ffff88c07fd2f3f0\n  R10: 0000000000000000 R11: 0000194754b575be R12: 0000000003572000\n  R13: 0000000003572fff R14: 0000000000100cca R15: 0000000005582fff\n  FS:  0000000000000000(0000) GS:ffff88c07fd00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000000000000000 CR3: 000000407d00f002 CR4: 00000000007706f0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  PKRU: 55555554\n  Call Trace:\n  \u003cTASK\u003e\n  ? __die+0x78/0xc0\n  ? page_fault_oops+0x2a8/0x3a0\n  ? __switch_to+0x133/0x530\n  ? wq_worker_running+0xa/0x40\n  ? exc_page_fault+0x63/0x130\n  ? asm_exc_page_fault+0x22/0x30\n  ? set_page_extent_mapped+0x20/0xb0\n  relocate_file_extent_cluster+0x1a7/0x940\n  relocate_data_extent+0xaf/0x120\n  relocate_block_group+0x20f/0x480\n  btrfs_relocate_block_group+0x152/0x320\n  btrfs_relocate_chunk+0x3d/0x120\n  btrfs_reclaim_bgs_work+0x2ae/0x4e0\n  process_scheduled_works+0x184/0x370\n  worker_thread+0xc6/0x3e0\n  ? blk_add_timer+0xb0/0xb0\n  kthread+0xae/0xe0\n  ? flush_tlb_kernel_range+0x90/0x90\n  ret_from_fork+0x2f/0x40\n  ? flush_tlb_kernel_range+0x90/0x90\n  ret_from_fork_asm+0x11/0x20\n  \u003c/TASK\u003e\n\nThis occurs because cleanup_one_transaction() calls\ndestroy_delalloc_inodes() which calls invalidate_inode_pages2() which\ntakes the folio_lock before setting mapping to NULL. We fail to check\nthis, and subsequently call set_extent_mapping(), which assumes that\nmapping != NULL (in fact it asserts that in debug mode)\n\nNote that the \"fixes\" patch here is not the one that introduced the\nrace (the very first iteration of this code from 2009) but a more recent\nchange that made this particular crash happen in practice."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhrtimers: Force migrate away hrtimers queued after CPUHP_AP_HRTIMERS_DYING\n\nhrtimers are migrated away from the dying CPU to any online target at\nthe CPUHP_AP_HRTIMERS_DYING stage in order not to delay bandwidth timers\nhandling tasks involved in the CPU hotplug forward progress.\n\nHowever wakeups can still be performed by the outgoing CPU after\nCPUHP_AP_HRTIMERS_DYING. Those can result again in bandwidth timers being\narmed. Depending on several considerations (crystal ball power management\nbased election, earliest timer already enqueued, timer migration enabled or\nnot), the target may eventually be the current CPU even if offline. If that\nhappens, the timer is eventually ignored.\n\nThe most notable example is RCU which had to deal with each and every of\nthose wake-ups by deferring them to an online CPU, along with related\nworkarounds:\n\n_ e787644caf76 (rcu: Defer RCU kthreads wakeup when CPU is dying)\n_ 9139f93209d1 (rcu/nocb: Fix RT throttling hrtimer armed from offline CPU)\n_ f7345ccc62a4 (rcu/nocb: Fix rcuog wake-up from offline softirq)\n\nThe problem isn\u0027t confined to RCU though as the stop machine kthread\n(which runs CPUHP_AP_HRTIMERS_DYING) reports its completion at the end\nof its work through cpu_stop_signal_done() and performs a wake up that\neventually arms the deadline server timer:\n\n   WARNING: CPU: 94 PID: 588 at kernel/time/hrtimer.c:1086 hrtimer_start_range_ns+0x289/0x2d0\n   CPU: 94 UID: 0 PID: 588 Comm: migration/94 Not tainted\n   Stopper: multi_cpu_stop+0x0/0x120 \u003c- stop_machine_cpuslocked+0x66/0xc0\n   RIP: 0010:hrtimer_start_range_ns+0x289/0x2d0\n   Call Trace:\n   \u003cTASK\u003e\n     start_dl_timer\n     enqueue_dl_entity\n     dl_server_start\n     enqueue_task_fair\n     enqueue_task\n     ttwu_do_activate\n     try_to_wake_up\n     complete\n     cpu_stopper_thread\n\nInstead of providing yet another bandaid to work around the situation, fix\nit in the hrtimers infrastructure instead: always migrate away a timer to\nan online target whenever it is enqueued from an offline CPU.\n\nThis will also allow to revert all the above RCU disgraceful hacks."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix block group refcount race in btrfs_create_pending_block_groups()\n\nBlock group creation is done in two phases, which results in a slightly\nunintuitive property: a block group can be allocated/deallocated from\nafter btrfs_make_block_group() adds it to the space_info with\nbtrfs_add_bg_to_space_info(), but before creation is completely completed\nin btrfs_create_pending_block_groups(). As a result, it is possible for a\nblock group to go unused and have \u0027btrfs_mark_bg_unused\u0027 called on it\nconcurrently with \u0027btrfs_create_pending_block_groups\u0027. This causes a\nnumber of issues, which were fixed with the block group flag\n\u0027BLOCK_GROUP_FLAG_NEW\u0027.\n\nHowever, this fix is not quite complete. Since it does not use the\nunused_bg_lock, it is possible for the following race to occur:\n\nbtrfs_create_pending_block_groups            btrfs_mark_bg_unused\n                                           if list_empty // false\n        list_del_init\n        clear_bit\n                                           else if (test_bit) // true\n                                                list_move_tail\n\nAnd we get into the exact same broken ref count and invalid new_bgs\nstate for transaction cleanup that BLOCK_GROUP_FLAG_NEW was designed to\nprevent.\n\nThe broken refcount aspect will result in a warning like:\n\n  [1272.943527] refcount_t: underflow; use-after-free.\n  [1272.943967] WARNING: CPU: 1 PID: 61 at lib/refcount.c:28 refcount_warn_saturate+0xba/0x110\n  [1272.944731] Modules linked in: btrfs virtio_net xor zstd_compress raid6_pq null_blk [last unloaded: btrfs]\n  [1272.945550] CPU: 1 UID: 0 PID: 61 Comm: kworker/u32:1 Kdump: loaded Tainted: G        W          6.14.0-rc5+ #108\n  [1272.946368] Tainted: [W]=WARN\n  [1272.946585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014\n  [1272.947273] Workqueue: btrfs_discard btrfs_discard_workfn [btrfs]\n  [1272.947788] RIP: 0010:refcount_warn_saturate+0xba/0x110\n  [1272.949532] RSP: 0018:ffffbf1200247df0 EFLAGS: 00010282\n  [1272.949901] RAX: 0000000000000000 RBX: ffffa14b00e3f800 RCX: 0000000000000000\n  [1272.950437] RDX: 0000000000000000 RSI: ffffbf1200247c78 RDI: 00000000ffffdfff\n  [1272.950986] RBP: ffffa14b00dc2860 R08: 00000000ffffdfff R09: ffffffff90526268\n  [1272.951512] R10: ffffffff904762c0 R11: 0000000063666572 R12: ffffa14b00dc28c0\n  [1272.952024] R13: 0000000000000000 R14: ffffa14b00dc2868 R15: 000001285dcd12c0\n  [1272.952850] FS:  0000000000000000(0000) GS:ffffa14d33c40000(0000) knlGS:0000000000000000\n  [1272.953458] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  [1272.953931] CR2: 00007f838cbda000 CR3: 000000010104e000 CR4: 00000000000006f0\n  [1272.954474] Call Trace:\n  [1272.954655]  \u003cTASK\u003e\n  [1272.954812]  ? refcount_warn_saturate+0xba/0x110\n  [1272.955173]  ? __warn.cold+0x93/0xd7\n  [1272.955487]  ? refcount_warn_saturate+0xba/0x110\n  [1272.955816]  ? report_bug+0xe7/0x120\n  [1272.956103]  ? handle_bug+0x53/0x90\n  [1272.956424]  ? exc_invalid_op+0x13/0x60\n  [1272.956700]  ? asm_exc_invalid_op+0x16/0x20\n  [1272.957011]  ? refcount_warn_saturate+0xba/0x110\n  [1272.957399]  btrfs_discard_cancel_work.cold+0x26/0x2b [btrfs]\n  [1272.957853]  btrfs_put_block_group.cold+0x5d/0x8e [btrfs]\n  [1272.958289]  btrfs_discard_workfn+0x194/0x380 [btrfs]\n  [1272.958729]  process_one_work+0x130/0x290\n  [1272.959026]  worker_thread+0x2ea/0x420\n  [1272.959335]  ? __pfx_worker_thread+0x10/0x10\n  [1272.959644]  kthread+0xd7/0x1c0\n  [1272.959872]  ? __pfx_kthread+0x10/0x10\n  [1272.960172]  ret_from_fork+0x30/0x50\n  [1272.960474]  ? __pfx_kthread+0x10/0x10\n  [1272.960745]  ret_from_fork_asm+0x1a/0x30\n  [1272.961035]  \u003c/TASK\u003e\n  [1272.961238] ---[ end trace 0000000000000000 ]---\n\nThough we have seen them in the async discard workfn as well. It is\nmost likely to happen after a relocation finishes which cancels discard,\ntears down the block group, etc.\n\nFix this fully by taking the lock arou\n---truncated---"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: init wiphy_work before allocating rfkill fails\n\nsyzbort reported a uninitialize wiphy_work_lock in cfg80211_dev_free. [1]\n\nAfter rfkill allocation fails, the wiphy release process will be performed,\nwhich will cause cfg80211_dev_free to access the uninitialized wiphy_work\nrelated data.\n\nMove the initialization of wiphy_work to before rfkill initialization to\navoid this issue.\n\n[1]\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nyou didn\u0027t initialize this object before use?\nturning off the locking correctness validator.\nCPU: 0 UID: 0 PID: 5935 Comm: syz-executor550 Not tainted 6.14.0-rc6-syzkaller-00103-g4003c9e78778 #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\n assign_lock_key kernel/locking/lockdep.c:983 [inline]\n register_lock_class+0xc39/0x1240 kernel/locking/lockdep.c:1297\n __lock_acquire+0x135/0x3c40 kernel/locking/lockdep.c:5103\n lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851\n __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\n _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162\n cfg80211_dev_free+0x30/0x3d0 net/wireless/core.c:1196\n device_release+0xa1/0x240 drivers/base/core.c:2568\n kobject_cleanup lib/kobject.c:689 [inline]\n kobject_release lib/kobject.c:720 [inline]\n kref_put include/linux/kref.h:65 [inline]\n kobject_put+0x1e4/0x5a0 lib/kobject.c:737\n put_device+0x1f/0x30 drivers/base/core.c:3774\n wiphy_free net/wireless/core.c:1224 [inline]\n wiphy_new_nm+0x1c1f/0x2160 net/wireless/core.c:562\n ieee80211_alloc_hw_nm+0x1b7a/0x2260 net/mac80211/main.c:835\n mac80211_hwsim_new_radio+0x1d6/0x54e0 drivers/net/wireless/virtual/mac80211_hwsim.c:5185\n hwsim_new_radio_nl+0xb42/0x12b0 drivers/net/wireless/virtual/mac80211_hwsim.c:6242\n genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210\n netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2533\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\n netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1338\n netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1882\n sock_sendmsg_nosec net/socket.c:718 [inline]\n __sock_sendmsg net/socket.c:733 [inline]\n ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573\n ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627\n __sys_sendmsg+0x16e/0x220 net/socket.c:2659\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83\n\nClose: https://syzkaller.appspot.com/bug?extid=aaf0488c83d1d5f4f029"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:57:54.899Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7e6040853f5b5f067a18c52286e676bc298fe6a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/b679fe84cd5cc6f3481b7131fd28676191ad2615"
        },
        {
          "url": "https://git.kernel.org/stable/c/eeacfbab984200dcdcd68fcf4c6e91e2c6b38792"
        },
        {
          "url": "https://git.kernel.org/stable/c/60606efbf52582c0ab93e99789fddced6b47297a"
        },
        {
          "url": "https://git.kernel.org/stable/c/2617f60c3613ef105b8db2d514d2cac2a1836f7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc88dee89d7b63eeb17699393eb659aadf9d9b7c"
        }
      ],
      "title": "wifi: cfg80211: init wiphy_work before allocating rfkill fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22119",
    "datePublished": "2025-04-16T14:13:04.639Z",
    "dateReserved": "2024-12-29T08:45:45.823Z",
    "dateUpdated": "2026-05-23T15:57:54.899Z",
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{
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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-27558",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-22T17:44:16.012957Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
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            "descriptions": [
              {
                "cweId": "CWE-345",
                "description": "CWE-345 Insufficient Verification of Data Authenticity",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-22T18:32:34.490Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:32:22.854Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "IEEE P802.11-REVme D1.1 through D7.0 allows FragAttacks against mesh networks. In mesh networks using Wi-Fi Protected Access (WPA, WPA2, or WPA3) or Wired Equivalent Privacy (WEP), an adversary can exploit this vulnerability to inject arbitrary frames towards devices that support receiving non-SSP A-MSDU frames. NOTE: this issue exists because of an incorrect fix for CVE-2020-24588. P802.11-REVme, as of early 2025, is a planned release of the 802.11 standard."
        }
      ],
      "problemTypes": [
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        "dateUpdated": "2025-05-21T18:47:02.982Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
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      "references": [
        {
          "url": "https://github.com/vanhoefm/fragattacks-survey-public/blob/main/README.md"
        }
      ]
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    "datePublished": "2025-05-21T00:00:00.000Z",
    "dateReserved": "2025-03-02T00:00:00.000Z",
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