CVE-2026-98748serial: 8250_bcm7271: fix use-after-free in brcmuart_remove()
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 12 days later
· 12 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < 134d239558f2ac2602fad2392ec3e6d8d76af7d8
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < dad9fb86829ee96bbc6315d7209ceb24820ef889
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < dd81650bec58ac70e5dfde2ec390acc1f0d1ed76
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < f5ce06e648d775cc1ccf66f4f594bb8b559a7d8e
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < e32440fa536af96bdbc61d933a7c3a920b965edc
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < 0794ba5332754866b2f1c0cca668775be3ffcf0a
- affected 41a469482de257ea8db43cf74b6311bd055de030 – < 189b9dc8c96ec9486482f27c1372b04a7152175e
- affected 5.13
- unaffected < 5.13
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.56 – ≤ 6.18.*
- unaffected 7.2.10 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/134d239558f2ac2602fad2392ec3e6d8d76af7d8 (opens in a new tab)
- https://git.kernel.org/stable/c/dad9fb86829ee96bbc6315d7209ceb24820ef889 (opens in a new tab)
- https://git.kernel.org/stable/c/dd81650bec58ac70e5dfde2ec390acc1f0d1ed76 (opens in a new tab)
- https://git.kernel.org/stable/c/f5ce06e648d775cc1ccf66f4f594bb8b559a7d8e (opens in a new tab)
- https://git.kernel.org/stable/c/e32440fa536af96bdbc61d933a7c3a920b965edc (opens in a new tab)
- https://git.kernel.org/stable/c/0794ba5332754866b2f1c0cca668775be3ffcf0a (opens in a new tab)
- https://git.kernel.org/stable/c/189b9dc8c96ec9486482f27c1372b04a7152175e (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-103833 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98748)Record last updated .