FKIE_CVE-2026-53011

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-28 08:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix use-after-free in advance_sched() on schedule switch In advance_sched(), when should_change_schedules() returns true, switch_schedules() is called to promote the admin schedule to oper. switch_schedules() queues the old oper schedule for RCU freeing via call_rcu(), but 'next' still points into an entry of the old oper schedule. The subsequent 'next->end_time = end_time' and rcu_assign_pointer(q->current_entry, next) are use-after-free. Fix this by selecting 'next' from the new oper schedule immediately after switch_schedules(), and using its pre-calculated end_time. setup_first_end_time() sets the first entry's end_time to base_time + interval when the schedule is installed, so the value is already correct. The deleted 'end_time = sched_base_time(admin)' assignment was also harmful independently: it would overwrite the new first entry's pre-calculated end_time with just base_time.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e62171df8ed4804d00db088f17eed06468233fa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/105425b1969c5affe532713cfac1c0b320d7ac2b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bd286fa3e21200133478ed523cc6a2788baf38a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3471874578160a28c171a607fa069f24062634b8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7256996e1ef553716817f3bfd077c2f3b48b582f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8fc396519ef4f081bc545e88f61241728bb78d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b73235da5dde77ed1264f9767b62c28c9d71fd78
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eee072fe16c646190d33ae69c9983d8de1562bf8
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_taprio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a8fc396519ef4f081bc545e88f61241728bb78d7",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "3471874578160a28c171a607fa069f24062634b8",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "7256996e1ef553716817f3bfd077c2f3b48b582f",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "eee072fe16c646190d33ae69c9983d8de1562bf8",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "1bd286fa3e21200133478ed523cc6a2788baf38a",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "b73235da5dde77ed1264f9767b62c28c9d71fd78",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "0e62171df8ed4804d00db088f17eed06468233fa",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            },
            {
              "lessThan": "105425b1969c5affe532713cfac1c0b320d7ac2b",
              "status": "affected",
              "version": "a3d43c0d56f1b94e74963a2fbadfb70126d92213",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_taprio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: taprio: fix use-after-free in advance_sched() on schedule switch\n\nIn advance_sched(), when should_change_schedules() returns true,\nswitch_schedules() is called to promote the admin schedule to oper.\nswitch_schedules() queues the old oper schedule for RCU freeing via\ncall_rcu(), but \u0027next\u0027 still points into an entry of the old oper\nschedule. The subsequent \u0027next-\u003eend_time = end_time\u0027 and\nrcu_assign_pointer(q-\u003ecurrent_entry, next) are use-after-free.\n\nFix this by selecting \u0027next\u0027 from the new oper schedule immediately\nafter switch_schedules(), and using its pre-calculated end_time.\nsetup_first_end_time() sets the first entry\u0027s end_time to\nbase_time + interval when the schedule is installed, so the value\nis already correct.\n\nThe deleted \u0027end_time = sched_base_time(admin)\u0027 assignment was also\nharmful independently: it would overwrite the new first entry\u0027s\npre-calculated end_time with just base_time."
    }
  ],
  "id": "CVE-2026-53011",
  "lastModified": "2026-06-28T08:16:29.600",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-24T17:17:12.310",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e62171df8ed4804d00db088f17eed06468233fa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/105425b1969c5affe532713cfac1c0b320d7ac2b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1bd286fa3e21200133478ed523cc6a2788baf38a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3471874578160a28c171a607fa069f24062634b8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7256996e1ef553716817f3bfd077c2f3b48b582f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8fc396519ef4f081bc545e88f61241728bb78d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b73235da5dde77ed1264f9767b62c28c9d71fd78"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eee072fe16c646190d33ae69c9983d8de1562bf8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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