CVE-2026-98707

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: shut down RX BA session timer on teardown Tearing down an RX BA session can leave the session timer queued on a freed tid_rx. Later timer-wheel processing and the timer callback itself then run against freed memory. An RX BAR handler can dereference tid_rx under RCU before teardown unpublishes it and stay in its read-side critical section while teardown deletes the session timer. The stale handler can then rearm the timer after timer_delete_sync() returns and before the RCU callback frees tid_rx. Use timer_shutdown_sync() so rearm attempts become ineffective once teardown starts. Keep reorder_timer unchanged: teardown marks the session removed under reorder_lock and its release path checks that state before rearming. session_timer has no equivalent guard because ieee80211_rx_h_ctrl() rearms it before taking reorder_lock.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-18 16:17:24.230000

Last modified

2026-10-30 13:21:20.033000

View original CVE JSON

{
  "id": "CVE-2026-98707",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-18T16:17:24.230",
  "lastModified": "2026-10-30T13:21:20.033",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: shut down RX BA session timer on teardown\n\nTearing down an RX BA session can leave the session timer queued on a\nfreed tid_rx. Later timer-wheel processing and the timer callback itself\nthen run against freed memory.\n\nAn RX BAR handler can dereference tid_rx under RCU before teardown\nunpublishes it and stay in its read-side critical section while teardown\ndeletes the session timer. The stale handler can then rearm the timer\nafter timer_delete_sync() returns and before the RCU callback frees\ntid_rx.\n\nUse timer_shutdown_sync() so rearm attempts become ineffective once\nteardown starts. Keep reorder_timer unchanged: teardown marks the session\nremoved under reorder_lock and its release path checks that state before\nrearming. session_timer has no equivalent guard because\nieee80211_rx_h_ctrl() rearms it before taking reorder_lock."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "net/mac80211/agg-rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "225c67a0bea0bd42f568f4842e747bb7f4bafebb",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "18cf74311f3f0bc77384549d270c489f64c6510a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "d0da6ab1fc53a68025929baf0947519c6c1684dc",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "7bb2a5bd4f07192fca35644fab7d49a17bfbc861",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "481f9230284c27052b59c587069f232c5d84779e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "09b7d5e4f88504e62ddf4ff31ebeebb3b87578ba",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a87f736d942c86255e3088c606f0e3eab6bbf784",
              "lessThan": "e588e83e5c7a0f6d7a77dbbb58927c8c8cfd598e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "net/mac80211/agg-rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "2.6.36",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "2.6.36",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.56",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.10",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/09b7d5e4f88504e62ddf4ff31ebeebb3b87578ba",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/18cf74311f3f0bc77384549d270c489f64c6510a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/225c67a0bea0bd42f568f4842e747bb7f4bafebb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/481f9230284c27052b59c587069f232c5d84779e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7bb2a5bd4f07192fca35644fab7d49a17bfbc861",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d0da6ab1fc53a68025929baf0947519c6c1684dc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e588e83e5c7a0f6d7a77dbbb58927c8c8cfd598e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}