CVE-2026-98059 (GCVE-0-2026-98059)
Vulnerability from cvelistv5
Published
2026-09-25 10:24
Modified
2026-10-19 09:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Mark sched_process_wait argument as nullable do_wait() passes wo->wo_pid to the sched_process_wait tracepoint. kernel_wait4() leaves wo_pid NULL for wait4(-1), and kernel_waitid_prepare() does likewise for waitid(P_ALL). btf_ctx_access() currently types argument 0 as PTR_TO_BTF_ID | PTR_TRUSTED. Without PTR_MAYBE_NULL, the verifier accepts an unchecked dereference. Trusted pointer loads have no fault protection, so a wait for any child can then cause a NULL pointer dereference in JITed BPF code. Add sched_process_wait to raw_tp_null_args[] with argument 0 marked nullable. The verifier rejects an unchecked dereference while preserving access after the program checks the pointer for NULL.
References
Impacted products
Vendor Product Version
Linux Linux Version: b2fc4b17fc13810ef440fb323fad3981cd174985
Version: 838a10bd2ebfe11a60dd67687533a7cfc220cc86
Version: 838a10bd2ebfe11a60dd67687533a7cfc220cc86
Version: 838a10bd2ebfe11a60dd67687533a7cfc220cc86
Version: 6.12.6   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/btf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bee862c79cb7e0e5c33b2df2e3a31d164705120d",
              "status": "affected",
              "version": "b2fc4b17fc13810ef440fb323fad3981cd174985",
              "versionType": "git"
            },
            {
              "lessThan": "3c03a1b8ded858685a73c1ba4080adef99db4544",
              "status": "affected",
              "version": "838a10bd2ebfe11a60dd67687533a7cfc220cc86",
              "versionType": "git"
            },
            {
              "lessThan": "b9205e936dde9a94e93376c8de6195b740bcd5d2",
              "status": "affected",
              "version": "838a10bd2ebfe11a60dd67687533a7cfc220cc86",
              "versionType": "git"
            },
            {
              "lessThan": "a453d6e3b8e8e1a321c8744d6189d763af9287d0",
              "status": "affected",
              "version": "838a10bd2ebfe11a60dd67687533a7cfc220cc86",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "6.12.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/btf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "6.12.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark sched_process_wait argument as nullable\n\ndo_wait() passes wo-\u003ewo_pid to the sched_process_wait tracepoint.\nkernel_wait4() leaves wo_pid NULL for wait4(-1), and\nkernel_waitid_prepare() does likewise for waitid(P_ALL).\n\nbtf_ctx_access() currently types argument 0 as PTR_TO_BTF_ID |\nPTR_TRUSTED. Without PTR_MAYBE_NULL, the verifier accepts an unchecked\ndereference. Trusted pointer loads have no fault protection, so a wait for\nany child can then cause a NULL pointer dereference in JITed BPF code.\n\nAdd sched_process_wait to raw_tp_null_args[] with argument 0 marked\nnullable. The verifier rejects an unchecked dereference while preserving\naccess after the program checks the pointer for NULL."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:13:06.971Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0"
        }
      ],
      "title": "bpf: Mark sched_process_wait argument as nullable",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98059",
    "datePublished": "2026-09-25T10:24:04.788Z",
    "dateReserved": "2026-09-25T10:19:56.072Z",
    "dateUpdated": "2026-10-19T09:13:06.971Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.