{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22"
            },
            {
              "fixed": "0f0da96ccb1b9f35f4d3d4540dcaab0969d9d6b0"
            },
            {
              "fixed": "e2c7e88815edd5ecfb88e7660ab9fd42bda6bc47"
            },
            {
              "fixed": "20c0eeb4313f9f89d47b80b672b5846f9827cb31"
            },
            {
              "fixed": "24a8f2c29aebb753ccb962fbb25bae18d7978f6e"
            },
            {
              "fixed": "60b50ceba6243802f8d2c0a9a7c2d549a93b1d64"
            },
            {
              "fixed": "d2a4e4e626b2f4670b69b430c357f03f53eb6632"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.18.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.152"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74722.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix memory leak in btrfs_do_encoded_write()\n\nLocal fuzzing of 6.12.94 has found the following memory leak:\n\nUnreferenced object 0xffff888018050a80 (size 64):\n  comm \"syz.0.17\", pid 10297, jiffies 4294953601\n  hex dump (first 32 bytes):\n    00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00  ................\n    10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff  ................\n  backtrace (crc a8a6fc29):\n    kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]\n    slab_post_alloc_hook mm/slub.c:4152 [inline]\n    slab_alloc_node mm/slub.c:4197 [inline]\n    __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358\n    kmalloc_noprof include/linux/slab.h:878 [inline]\n    extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline]\n    qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305\n    btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355\n    btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746\n    btrfs_encoded_write fs/btrfs/file.c:1482 [inline]\n    btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507\n    btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738\n    btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1\n    vfs_ioctl fs/ioctl.c:51 [inline]\n    __do_sys_ioctl fs/ioctl.c:906 [inline]\n    __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892\n    do_syscall_x64 arch/x86/entry/common.c:47 [inline]\n    do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78\n    entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUnreferenced object 0xffff888018050a00 (size 64):\n  comm \"syz.0.17\", pid 10297, jiffies 4294953601\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00  ................\n    90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff  ................\n  backtrace (crc cb5c9580):\n    kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]\n    slab_post_alloc_hook mm/slub.c:4152 [inline]\n    slab_alloc_node mm/slub.c:4197 [inline]\n    __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358\n    kmalloc_noprof include/linux/slab.h:878 [inline]\n    kzalloc_noprof include/linux/slab.h:1014 [inline]\n    ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114\n    extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline]\n    __set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086\n    set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821\n    qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312\n    btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355\n    btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746\n    btrfs_encoded_write fs/btrfs/file.c:1482 [inline]\n    btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507\n    btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738\n    btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1\n    vfs_ioctl fs/ioctl.c:51 [inline]\n    __do_sys_ioctl fs/ioctl.c:906 [inline]\n    __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892\n    do_syscall_x64 arch/x86/entry/common.c:47 [inline]\n    do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78\n    entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFix this by freeing an extent changeset before returning from\nbtrfs_do_encoded_write().",
  "id": "CVE-2026-74722",
  "modified": "2026-08-24T11:36:09.715346682Z",
  "published": "2026-08-22T15:33:14.582Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f0da96ccb1b9f35f4d3d4540dcaab0969d9d6b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20c0eeb4313f9f89d47b80b672b5846f9827cb31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24a8f2c29aebb753ccb962fbb25bae18d7978f6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60b50ceba6243802f8d2c0a9a7c2d549a93b1d64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2a4e4e626b2f4670b69b430c357f03f53eb6632"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2c7e88815edd5ecfb88e7660ab9fd42bda6bc47"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74722.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74722"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "btrfs: fix memory leak in btrfs_do_encoded_write()"
}