{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2e1cdfe184b5202d51e0611d7a051e2bea303946"
            },
            {
              "fixed": "8d669db59f7283b838e029af29da12e505265fae"
            },
            {
              "fixed": "4091f2d5b26d117c992ffcce1a5df425a0daedcd"
            },
            {
              "fixed": "be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148"
            },
            {
              "fixed": "4f9a0f548413bf864f609c9f4bc56e3f1b3577d4"
            },
            {
              "fixed": "1ade9a335c69fc735cb7b3f222ed35ab135540fb"
            },
            {
              "fixed": "5ac900f73ce1d4d8308f40752b51bc8a02b244d2"
            },
            {
              "fixed": "1674d9bff8073bdee5dbc200f56fc3caa28d0566"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90274.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: etm4x: fix underflow for usage of (nrseqstate - 1)\n\nAccording to IHI006H Embedded Trace Macrocell Architecture\nSpecification[0], TRCSEQEVR\u003cn\u003e is implemented only when\nTRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2;\notherwise, TRCIDR5.NUMSEQSTATE is 0b000.\n\nIOW, the number of usage in the initialisation or setting\nTRCSEQEVR\u003cn\u003e with drvdata-\u003enrseqstate - 1 in the loop could make\nunderflow issue when TRCIDR5.NUMSEQSTATE is 0b000.\n\nTherefore, introduce nr_seq_ctrls field and untie it from nrseqstate.\nAs part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and\napply nr_seq_ctrls and above macro to TRCSEQEVR\u003cn\u003e relevant fields setup.",
  "id": "CVE-2026-90274",
  "modified": "2026-09-19T03:30:19.049627196Z",
  "published": "2026-09-17T16:08:07.269Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90274.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90274"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "coresight: etm4x: fix underflow for usage of (nrseqstate - 1)"
}