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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98748

serial: 8250_bcm7271: fix use-after-free in brcmuart_remove()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_bcm7271: fix use-after-free in brcmuart_remove() brcmuart_handle_irq() starts priv->hrt to work around a receive-timeout quirk of the 8250 core when hardware flow control is enabled; the timer callback brcmuart_hrtimer_func() dereferences priv. brcmuart_remove() cancels the hrtimer before it unregisters the port, so a receive-timeout interrupt that arrives in between re-arms the timer. After devm frees priv, the callback runs on freed memory. Unregister the port before cancelling the hrtimer. serial8250_unregister_port() shuts the port down and frees its IRQ, so brcmuart_handle_irq() can no longer restart the timer, and the final hrtimer_cancel() drains any timer that was armed before or during the unregister. This issue was found by an in-house static analysis tool.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 41a469482de257ea8db43cf74b6311bd055de030 to < dd81650bec58ac70e5dfde2ec390acc1f0d1ed76affected
  • 41a469482de257ea8db43cf74b6311bd055de030 to < f5ce06e648d775cc1ccf66f4f594bb8b559a7d8eaffected
  • 41a469482de257ea8db43cf74b6311bd055de030 to < e32440fa536af96bdbc61d933a7c3a920b965edcaffected
  • 41a469482de257ea8db43cf74b6311bd055de030 to < 0794ba5332754866b2f1c0cca668775be3ffcf0aaffected
  • 41a469482de257ea8db43cf74b6311bd055de030 to < 189b9dc8c96ec9486482f27c1372b04a7152175eaffected

Linux Linux

Default version status: affected

  • 5.13affected
  • 0 to < 5.13unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.113 to ≤ 6.12.*unaffected
  • 6.18.56 to ≤ 6.18.*unaffected
  • 7.2.10 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References