{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-23114",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23114",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-02-14T15:09:47.048Z",
    "updatedAt": "2026-05-11T22:00:23.756Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "arm64/fpsimd: ptrace: Fix SVE writes on !SME systems",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64/fpsimd: ptrace: Fix SVE writes on !SME systems\n\nWhen SVE is supported but SME is not supported, a ptrace write to the\nNT_ARM_SVE regset can place the tracee into an invalid state where\n(non-streaming) SVE register data is stored in FP_STATE_SVE format but\nTIF_SVE is clear. This can result in a later warning from\nfpsimd_restore_current_state(), e.g.\n\n  WARNING: CPU: 0 PID: 7214 at arch/arm64/kernel/fpsimd.c:383 fpsimd_restore_current_state+0x50c/0x748\n\nWhen this happens, fpsimd_restore_current_state() will set TIF_SVE,\nplacing the task into the correct state. This occurs before any other\ncheck of TIF_SVE can possibly occur, as other checks of TIF_SVE only\nhappen while the FPSIMD/SVE/SME state is live. Thus, aside from the\nwarning, there is no functional issue.\n\nThis bug was introduced during rework to error handling in commit:\n\n  9f8bf718f2923 (\"arm64/fpsimd: ptrace: Gracefully handle errors\")\n\n... where the setting of TIF_SVE was moved into a block which is only\nexecuted when system_supports_sme() is true.\n\nFix this by removing the system_supports_sme() check. This ensures that\nTIF_SVE is set for (SVE-formatted) writes to NT_ARM_SVE, at the cost of\nunconditionally manipulating the tracee's saved svcr value. The\nmanipulation of svcr is benign and inexpensive, and we already do\nsimilar elsewhere (e.g. during signal handling), so I don't think it's\nworth guarding this with system_supports_sme() checks.\n\nAside from the above, there is no functional change. The 'type' argument\nto sve_set_common() is only set to ARM64_VEC_SME (in ssve_set())) when\nsystem_supports_sme(), so the ARM64_VEC_SME case in the switch statement\nis still unreachable when !system_supports_sme(). When\nCONFIG_ARM64_SME=n, the only caller of sve_set_common() is sve_set(),\nand the compiler can constant-fold for the case where type is\nARM64_VEC_SVE, removing the logic for other cases.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9f8bf718f29230e38a048d08fc3063e316cd60c1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f39984176e7edcaba3432b6c649c6fe93bf2f80"
            },
            {
              "version": "9f8bf718f29230e38a048d08fc3063e316cd60c1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "128a7494a9f15aad60cc6b7e3546bf481ac54a13"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.16"
            },
            {
              "version": "6.18.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}