{
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          "dateUpdated": "2024-08-02T04:54:32.553Z",
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            "url": "https://git.kernel.org/stable/c/ebe5ea02577b2c527958af1b76ac472c7ab53a56"
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            "url": "https://git.kernel.org/stable/c/724d8042cef84496ddb4492dc120291f997ae26b"
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        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-42111",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:17:29.663997Z",
                "version": "2.0.3"
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              "type": "ssvc"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/qgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ebe5ea02577b2c527958af1b76ac472c7ab53a56",
              "status": "affected",
              "version": "b5357cb268c41b4e2b7383d2759fc562f5b58c33",
              "versionType": "git"
            },
            {
              "lessThan": "724d8042cef84496ddb4492dc120291f997ae26b",
              "status": "affected",
              "version": "b5357cb268c41b4e2b7383d2759fc562f5b58c33",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c839f73a70f312f477225b64020364e108f08231",
              "versionType": "git"
            },
            {
              "lessThan": "6.9",
              "status": "affected",
              "version": "6.8.10",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/qgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.9",
              "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": "6.9.9",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
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                {
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: always do the basic checks for btrfs_qgroup_inherit structure\n\n[BUG]\nSyzbot reports the following regression detected by KASAN:\n\n  BUG: KASAN: slab-out-of-bounds in btrfs_qgroup_inherit+0x42e/0x2e20 fs/btrfs/qgroup.c:3277\n  Read of size 8 at addr ffff88814628ca50 by task syz-executor318/5171\n\n  CPU: 0 PID: 5171 Comm: syz-executor318 Not tainted 6.10.0-rc2-syzkaller-00010-g2ab795141095 #0\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024\n  Call Trace:\n   \u003cTASK\u003e\n   __dump_stack lib/dump_stack.c:88 [inline]\n   dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n   print_address_description mm/kasan/report.c:377 [inline]\n   print_report+0x169/0x550 mm/kasan/report.c:488\n   kasan_report+0x143/0x180 mm/kasan/report.c:601\n   btrfs_qgroup_inherit+0x42e/0x2e20 fs/btrfs/qgroup.c:3277\n   create_pending_snapshot+0x1359/0x29b0 fs/btrfs/transaction.c:1854\n   create_pending_snapshots+0x195/0x1d0 fs/btrfs/transaction.c:1922\n   btrfs_commit_transaction+0xf20/0x3740 fs/btrfs/transaction.c:2382\n   create_snapshot+0x6a1/0x9e0 fs/btrfs/ioctl.c:875\n   btrfs_mksubvol+0x58f/0x710 fs/btrfs/ioctl.c:1029\n   btrfs_mksnapshot+0xb5/0xf0 fs/btrfs/ioctl.c:1075\n   __btrfs_ioctl_snap_create+0x387/0x4b0 fs/btrfs/ioctl.c:1340\n   btrfs_ioctl_snap_create_v2+0x1f2/0x3a0 fs/btrfs/ioctl.c:1422\n   btrfs_ioctl+0x99e/0xc60\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:907 [inline]\n   __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n   do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n  RIP: 0033:0x7fcbf1992509\n  RSP: 002b:00007fcbf1928218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n  RAX: ffffffffffffffda RBX: 00007fcbf1a1f618 RCX: 00007fcbf1992509\n  RDX: 0000000020000280 RSI: 0000000050009417 RDI: 0000000000000003\n  RBP: 00007fcbf1a1f610 R08: 00007ffea1298e97 R09: 0000000000000000\n  R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcbf19eb660\n  R13: 00000000200002b8 R14: 00007fcbf19e60c0 R15: 0030656c69662f2e\n   \u003c/TASK\u003e\n\nAnd it also pinned it down to commit b5357cb268c4 (\"btrfs: qgroup: do not\ncheck qgroup inherit if qgroup is disabled\").\n\n[CAUSE]\nThat offending commit skips the whole qgroup inherit check if qgroup is\nnot enabled.\n\nBut that also skips the very basic checks like\nnum_ref_copies/num_excl_copies and the structure size checks.\n\nMeaning if a qgroup enable/disable race is happening at the background,\nand we pass a btrfs_qgroup_inherit structure when the qgroup is\ndisabled, the check would be completely skipped.\n\nThen at the time of transaction commitment, qgroup is re-enabled and\nbtrfs_qgroup_inherit() is going to use the incorrect structure and\ncausing the above KASAN error.\n\n[FIX]\nMake btrfs_qgroup_check_inherit() only skip the source qgroup checks.\nSo that even if invalid btrfs_qgroup_inherit structure is passed in, we\ncan still reject invalid ones no matter if qgroup is enabled or not.\n\nFurthermore we do already have an extra safety inside\nbtrfs_qgroup_inherit(), which would just ignore invalid qgroup sources,\nso even if we only skip the qgroup source check we\u0027re still safe."
        }
      ],
      "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": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached through the BTRFS_IOC_SNAP_CREATE_V2/BTRFS_IOC_SUBVOL_CREATE_V2 ioctls on a mounted btrfs filesystem, requiring a local account on the system. There is no network-facing path to this code.\nAC:L - The attacker fully controls the malformed btrfs_qgroup_inherit structure and the long side of the check-to-use window, which spans an entire transaction commit and can be stretched with I/O load, and the snapshot ioctl can be replayed in a tight loop indefinitely until the window is hit. No memory layout or timing condition outside the attacker\u0027s influence is needed to trigger the out-of-bounds access itself.\nPR:L - Issuing the vulnerable ioctl requires no capability at all - subvolume creation is explicitly unrestricted and snapshot creation only requires ownership of one\u0027s own subvolume, so an ordinary unprivileged user with write access to a btrfs directory suffices. The concurrent qgroup enable is background system activity (snapper, container/LXD tooling), not a privilege the attacker must hold.\nUI:N - The attack is driven entirely by the attacker\u0027s own ioctl calls against an already-mounted btrfs filesystem. No victim action is required.\nS:U - The out-of-bounds access corrupts kernel slab memory within the same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The loop performs an unbounded sequential out-of-bounds read of kernel slab memory past a buffer of attacker-chosen size, with the read length controlled by the unvalidated num_qgroups/num_ref_copies/num_excl_copies fields. Read values that match existing qgroup IDs escape zeroing and are propagated into qgroup relations, and the corrupted adjacent objects provide a route to broader kernel memory disclosure.\nI:H - The same loop performs an out-of-bounds write (*i_qgroups = 0ULL) into memory following the slab object, with both the target slab size class (via vol_args-\u003esize) and the corruption length attacker-controlled. Zeroing pointers, refcounts, and length fields in groomed neighbouring objects is a well-established path to use-after-free and privilege escalation.\nA:H - Syzbot reproduced this as a KASAN slab-out-of-bounds, and a large attacker-supplied count walks the loop into unmapped memory or destroys adjacent kernel structures, producing an oops or panic. The corruption also occurs during transaction commit, where failures escalate to a filesystem abort."
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:35:43.268Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/ebe5ea02577b2c527958af1b76ac472c7ab53a56"
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        {
          "url": "https://git.kernel.org/stable/c/724d8042cef84496ddb4492dc120291f997ae26b"
        }
      ],
      "title": "btrfs: always do the basic checks for btrfs_qgroup_inherit structure",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-42111",
    "datePublished": "2024-07-30T07:46:05.570Z",
    "dateReserved": "2024-07-29T15:50:41.176Z",
    "dateUpdated": "2026-08-05T11:35:43.268Z",
    "state": "PUBLISHED"
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}