CVE-2026-53180 (GCVE-0-2026-53180)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-06-28 06:39
VLAI
Title
timers/migration: Fix livelock in tmigr_handle_remote_up()
Summary
In the Linux kernel, the following vulnerability has been resolved: timers/migration: Fix livelock in tmigr_handle_remote_up() tmigr_handle_remote_cpu() skips timer_expire_remote() when cpu == smp_processor_id(), assuming the local softirq path already handled this CPU's timers. This assumption is wrong because jiffies can advance after the handling of the CPU's global timers in run_timer_base(BASE_GLOBAL) and before tmigr_handle_remote() evaluates the expiry times. As a consequence a timer which expires after the CPU local timer wheel advanced and becomes expired in the remote handling is ignored and the callback is never invoked and removed from the timer wheel. What's worse is that fetch_next_timer_interrupt_remote() keeps reporting it as expired, and the event is re-queued with expires == now on each iteration. The goto-again loop spins indefinitely. Fix this by calling timer_expire_remote() unconditionally. That's minimal overhead for the common case as __run_timer_base() returns immediately if there is nothing to expire in the local wheel. [ tglx: Amend change log and add a comment ]
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7ee988770326fca440472200c3eb58935fe712f6 , < 07b3b83587fb3012619f4439389b64a955fc7836 (git)
Affected: 7ee988770326fca440472200c3eb58935fe712f6 , < 1d6c2062b77be09ec15d6bf637b2e2221c4482fc (git)
Affected: 7ee988770326fca440472200c3eb58935fe712f6 , < d338e61ea94052a786aac9f58e9f0d8520afa0fd (git)
Affected: 7ee988770326fca440472200c3eb58935fe712f6 , < d486b4934a8e504376b85cdb3766f306d57aff5b (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-26T09:09:45+00:00",
      "cve": "CVE-2026-53180",
      "id": "CVE-2026-53180",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: timers/migration: Fix livelock in tmigr_handle_remote_up()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53180.json",
      "version": "3"
    },
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-01T03:17:48Z",
      "cve": "CVE-2026-53180",
      "id": "CVE-2026-53180",
      "initial_release_date": "2026-06-26T02:10:59Z",
      "product_status:known_affected": "70",
      "product_status:known_not_affected": "221",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53180",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53180.json",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.