{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d675c989ed2d4ba23dff615330b04371aea83534"
            },
            {
              "fixed": "64153f1dd14dabfd4e79bf506bb5b5d66f7b42eb"
            },
            {
              "fixed": "b62fb105961b677418cbc0a0a8837a41735729ec"
            },
            {
              "fixed": "b4da5c85cd701066ff429727fb61b84bde8bcce2"
            },
            {
              "fixed": "00bcc303000bac524d62eed054d77372b38ace0f"
            },
            {
              "fixed": "22182f91c6703af6e9832cffe6d22b381031cb5a"
            },
            {
              "fixed": "85e5512369d4fe6e5f2c43712d9f9e01d4ae8437"
            },
            {
              "fixed": "b627c6ba20be20334338229b4820baacb9d96826"
            },
            {
              "fixed": "c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.13"
            },
            {
              "fixed": "5.10.273"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.224"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.191"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.160"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98969.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: em_text: reject unterminated algo before autoload\n\nThis is a follow-up to commit 9c572a83037a (\"net/sched: fix potential\nstack infoleak in em_text_dump()\"), which zero-initialised the dump-side\nstruct. Sashiko pointed at a pre-existing bug that exposed the change-side\ninput-validation gap open.\n\nem_text_change() casts the raw netlink attribute payload to struct\ntcf_em_text and passes conf-\u003ealgo, a 16-byte array with no enforced NUL\nterminator, to textsearch_prepare().  On the TS_AUTOLOAD retry\ntextsearch_prepare() calls request_module(\"ts_%s\", algo); vsnprintf()\nwalks %s until it finds a NUL, so an algo[] with no NUL reads past the\narray into the adjacent struct fields and payload and feeds those bytes\nto the usermode helper command line.  This is an out-of-bounds read and\na kernel memory disclosure.\n\nReject the attribute when no NUL exists within TC_EM_TEXT_ALGOSIZ bytes,\nmatching the check xt_string has had since 3ab720881b6e.\n\nConditions to recreate the bug:\n- CAP_NET_ADMIN on the target netns (namespace-local via unshare -Urn\n  is enough)\n- install clsact on an interface, then add a basic filter with one text\n  ematch whose algo[] is 16 bytes with no NUL (e.g. \"A\"*16) and\n  pattern_len at least 1\n- the add fails with -ENOENT and the kernel invokes modprobe with a\n  module name made of \"ts_\" plus the 16 bytes and the adjacent payload",
  "id": "CVE-2026-98969",
  "modified": "2026-11-01T02:30:39.633450851Z",
  "published": "2026-10-23T12:19:42.012Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00bcc303000bac524d62eed054d77372b38ace0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22182f91c6703af6e9832cffe6d22b381031cb5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64153f1dd14dabfd4e79bf506bb5b5d66f7b42eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85e5512369d4fe6e5f2c43712d9f9e01d4ae8437"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4da5c85cd701066ff429727fb61b84bde8bcce2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b627c6ba20be20334338229b4820baacb9d96826"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b62fb105961b677418cbc0a0a8837a41735729ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9728fcf2e7fb4a7a8d08ebd9524c3b02ae1a021"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98969.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98969"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "summary": "net/sched: em_text: reject unterminated algo before autoload"
}