GHSA-FCQ7-VVCV-2QG9

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 21:31
VLAI?
Details

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

ceph: supply snapshot context in ceph_zero_partial_object()

The ceph_zero_partial_object function was missing proper snapshot context for its OSD write operations, which could lead to data inconsistencies in snapshots.

Reproducer: ../src/vstart.sh --new -x --localhost --bluestore ./bin/ceph auth caps client.fs_a mds 'allow rwps fsname=a' mon 'allow r fsname=a' osd 'allow rw tag cephfs data=a' mount -t ceph fs_a@.a=/ /mnt/mycephfs/ -o conf=./ceph.conf dd if=/dev/urandom of=/mnt/mycephfs/foo bs=64K count=1 mkdir /mnt/mycephfs/.snap/snap1 md5sum /mnt/mycephfs/.snap/snap1/foo fallocate -p -o 0 -l 4096 /mnt/mycephfs/foo echo 3 > /proc/sys/vm/drop/caches md5sum /mnt/mycephfs/.snap/snap1/foo # get different md5sum!!

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-43273"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:48Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: supply snapshot context in ceph_zero_partial_object()\n\nThe ceph_zero_partial_object function was missing proper snapshot\ncontext for its OSD write operations, which could lead to data\ninconsistencies in snapshots.\n\nReproducer:\n../src/vstart.sh --new -x --localhost --bluestore\n./bin/ceph auth caps client.fs_a mds \u0027allow rwps fsname=a\u0027 mon \u0027allow r fsname=a\u0027 osd \u0027allow rw tag cephfs data=a\u0027\nmount -t ceph fs_a@.a=/ /mnt/mycephfs/ -o conf=./ceph.conf\ndd if=/dev/urandom of=/mnt/mycephfs/foo bs=64K count=1\nmkdir /mnt/mycephfs/.snap/snap1\nmd5sum /mnt/mycephfs/.snap/snap1/foo\nfallocate -p -o 0 -l 4096 /mnt/mycephfs/foo\necho 3 \u003e /proc/sys/vm/drop/caches\nmd5sum /mnt/mycephfs/.snap/snap1/foo # get different md5sum!!",
  "id": "GHSA-fcq7-vvcv-2qg9",
  "modified": "2026-05-08T21:31:21Z",
  "published": "2026-05-06T12:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43273"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36673344b41c31fb502dd0d0113cec1aa96f581e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4097e70fc543cca72982854108a32f6ae924e727"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/531a76c5a2e44264cee8a70121e63eb28c1ba728"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5788b742007f53406049bef917833a71ddd43f60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/69e59a87bab0ea31ab2a584fc65e12dafacf8953"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/757873abfc8ea38592582180aed0f57f0f0cb07a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9efa154609cdb658f51c7d76b30a09f7e6485250"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f16bd3fa74a2084ee7e16a8a2be7e7399b970907"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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