ceph: avoid putting the realm twice when decoding snaps fails

{
  "id": "07a3e7dbbdead619d4007b3348b00e27146108c39fd17d5321e1e336fa682040",
  "url": "https://osv.dev/vulnerability/CVE-2022-49770",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ceph: avoid putting the realm twice when decoding snaps fails",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ceph: avoid putting the realm twice when decoding snaps fails When decoding the snaps fails it maybe leaving the 'first_realm' and 'realm' pointing to the same snaprealm memory. And then it'll put it twice and could cause random use-after-free, BUG_ON, etc issues.",
    "evidence": "osv:CVE-2022-49770",
    "products": [
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    "severity": "critical",
    "structured": {
      "id": "CVE-2022-49770",
      "aliases": [
        "CVE-2022-49770"
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:40.404537124Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/044bc6d3c2c0e9090b0841e7b723875756534b45",
        "https://git.kernel.org/stable/c/274e4c79a3a2a24fba7cfe0e41113f1138785c37",
        "https://git.kernel.org/stable/c/2f6e2de3a5289004650118b61f138fe7c28e1905",
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        "https://git.kernel.org/stable/c/fd879c83e87735ab8f00ef7755752cf0cbae24b2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49770.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49770",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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        "cna_assigner": "Linux",
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 507880,
  "published_at": "2025-05-01T14:09:08.173+00:00"
}