{
  "cveId": "CVE-2023-52582",
  "url": "https://patchblox.com/security/cve/CVE-2023-52582",
  "summary": "CVE-2023-52582 is fixed in 21 products on 1 platform, first by ALAS2023-2023-385, released October 12, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  netfs: Only call folio_start_fscache() one time...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  netfs: Only call folio_start_fscache() one time for each folio  If a network filesystem using netfs implements a clamp_length() function, it can set subrequest lengths smaller than a page size.  When we loop through the folios in netfs_rreq_unlock_folios() to set any folios to be written back, we need to make sure we only call folio_start_fscache() once for each folio.  Otherwise, this simple testcase:    mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs   dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1   1\u002B0 records in   1\u002B0 records out   4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s   echo 3 \u003E /proc/sys/vm/drop_caches   cat /mnt/nfs/file.bin \u003E /dev/null  will trigger an oops similar to the following:    page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))   ------------[ cut here ]------------   kernel BUG at include/linux/netfs.h:44!   ...   CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5   ...   RIP: 0010:netfs_rreq_unlock_folios\u002B0x68e/0x730 [netfs]   ...   Call Trace:     netfs_rreq_assess\u002B0x497/0x660 [netfs]     netfs_subreq_terminated\u002B0x32b/0x610 [netfs]     nfs_netfs_read_completion\u002B0x14e/0x1a0 [nfs]     nfs_read_completion\u002B0x2f9/0x330 [nfs]     rpc_free_task\u002B0x72/0xa0 [sunrpc]     rpc_async_release\u002B0x46/0x70 [sunrpc]     process_one_work\u002B0x3bd/0x710     worker_thread\u002B0x89/0x610     kthread\u002B0x181/0x1c0     ret_from_fork\u002B0x29/0x50",
  "published": "2023-10-12T16:11:00Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00227,
  "epssPercentile": 0.13491,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.56-82.125",
      "release": "amzn 2023",
      "fixedVersion": "1.0-0.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.64-1",
      "fix": "DEBIAN-CVE-2023-52582",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52582",
      "released": "2024-03-02T22:15:49Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.5.6-1",
      "fix": "DEBIAN-CVE-2023-52582",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52582",
      "released": "2024-03-02T22:15:49Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.5.6-1",
      "fix": "DEBIAN-CVE-2023-52582",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52582",
      "released": "2024-03-02T22:15:49Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.56-82.125.amzn2023",
      "fix": "ALAS2023-2023-385",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-385",
      "released": "2023-10-12T16:11:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}