Vulnerability-Lookup

GHSA-424M-4R3P-F43G

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix memory leak in btrfs_do_encoded_write()

Local fuzzing of 6.12.94 has found the following memory leak:

Unreferenced object 0xffff888018050a80 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32 bytes): 00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ 10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff ................ backtrace (crc a8a6fc29): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline] qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305 btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355 btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746 btrfs_encoded_write fs/btrfs/file.c:1482 [inline] btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507 btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738 btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Unreferenced object 0xffff888018050a00 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00 ................ 90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff ................ backtrace (crc cb5c9580): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114 extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline] __set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086 set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821 qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312 btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355 btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746 btrfs_encoded_write fs/btrfs/file.c:1482 [inline] btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507 btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738 btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Fix this by freeing an extent changeset before returning from btrfs_do_encoded_write().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74722"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:47Z",
    "severity": null
  },
  "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": "GHSA-424m-4r3p-f43g",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74722"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74722 (GCVE-0-2026-74722)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33

Title

btrfs: fix memory leak in btrfs_do_encoded_write()

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix memory leak in btrfs_do_encoded_write() Local fuzzing of 6.12.94 has found the following memory leak: Unreferenced object 0xffff888018050a80 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32 bytes): 00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ 10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff ................ backtrace (crc a8a6fc29): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline] qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305 btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355 btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746 btrfs_encoded_write fs/btrfs/file.c:1482 [inline] btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507 btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738 btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x77/0x7f Unreferenced object 0xffff888018050a00 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00 ................ 90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff ................ backtrace (crc cb5c9580): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114 extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline] __set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086 set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821 qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312 btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355 btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746 btrfs_encoded_write fs/btrfs/file.c:1482 [inline] btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507 btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738 btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fix this by freeing an extent changeset before returning from btrfs_do_encoded_write().

Severity

No CVSS data available.

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/0f0da96ccb1b9f35f…
https://git.kernel.org/stable/c/e2c7e88815edd5ecf…
https://git.kernel.org/stable/c/20c0eeb4313f9f89d…
https://git.kernel.org/stable/c/24a8f2c29aebb753c…
https://git.kernel.org/stable/c/60b50ceba6243802f…
https://git.kernel.org/stable/c/d2a4e4e626b2f4670…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 , < 0f0da96ccb1b9f35f4d3d4540dcaab0969d9d6b0 (git) Affected: 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 , < e2c7e88815edd5ecfb88e7660ab9fd42bda6bc47 (git) Affected: 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 , < 20c0eeb4313f9f89d47b80b672b5846f9827cb31 (git) Affected: 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 , < 24a8f2c29aebb753ccb962fbb25bae18d7978f6e (git) Affected: 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 , < 60b50ceba6243802f8d2c0a9a7c2d549a93b1d64 (git) Affected: 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 , < d2a4e4e626b2f4670b69b430c357f03f53eb6632 (git)
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.152 , ≤ 6.6.* (semver) Unaffected: 6.12.104 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0f0da96ccb1b9f35f4d3d4540dcaab0969d9d6b0",
              "status": "affected",
              "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22",
              "versionType": "git"
            },
            {
              "lessThan": "e2c7e88815edd5ecfb88e7660ab9fd42bda6bc47",
              "status": "affected",
              "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22",
              "versionType": "git"
            },
            {
              "lessThan": "20c0eeb4313f9f89d47b80b672b5846f9827cb31",
              "status": "affected",
              "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22",
              "versionType": "git"
            },
            {
              "lessThan": "24a8f2c29aebb753ccb962fbb25bae18d7978f6e",
              "status": "affected",
              "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22",
              "versionType": "git"
            },
            {
              "lessThan": "60b50ceba6243802f8d2c0a9a7c2d549a93b1d64",
              "status": "affected",
              "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22",
              "versionType": "git"
            },
            {
              "lessThan": "d2a4e4e626b2f4670b69b430c357f03f53eb6632",
              "status": "affected",
              "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.152",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:14.582Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0f0da96ccb1b9f35f4d3d4540dcaab0969d9d6b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2c7e88815edd5ecfb88e7660ab9fd42bda6bc47"
        },
        {
          "url": "https://git.kernel.org/stable/c/20c0eeb4313f9f89d47b80b672b5846f9827cb31"
        },
        {
          "url": "https://git.kernel.org/stable/c/24a8f2c29aebb753ccb962fbb25bae18d7978f6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/60b50ceba6243802f8d2c0a9a7c2d549a93b1d64"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2a4e4e626b2f4670b69b430c357f03f53eb6632"
        }
      ],
      "title": "btrfs: fix memory leak in btrfs_do_encoded_write()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74722",
    "datePublished": "2026-08-22T15:33:14.582Z",
    "dateReserved": "2026-08-15T05:44:03.929Z",
    "dateUpdated": "2026-08-22T15:33:14.582Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-424M-4R3P-F43G

CVE-2026-74722 (GCVE-0-2026-74722)

Tags

Sightings

Nomenclature