CVE-2023-54220serial: 8250: Fix oops for port->pm on uart_change_pm()
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Fix oops for port->pm on uart_change_pm() Unloading a hardware specific 8250 driver can produce error "Unable to handle kernel paging request at virtual address" about ten seconds after unloading the driver. This happens on uart_hangup() calling uart_change_pm(). Turns out commit 04e82793f068 ("serial: 8250: Reinit port->pm on port specific driver unbind") was only a partial fix. If the hardware specific driver has initialized port->pm function, we need to clear port->pm too. Just reinitializing port->ops does not do this. Otherwise serial8250_pm() will call port->pm() instead of serial8250_do_pm().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 490bf37eaabb0a857ed1ae8e75d8854e41662f1c builds before 66f3e55960698c874b0598277913b478ecd29573; from c9e080c3005fd183c56ff8f4d75edb5da0765d2c before 720a297b334e85d34099e83d1f375b92c3efedd6; from d5cd2928d31042a7c0a01464f9a8d95be736421d before b653289ca6460a6552c8590b75dfa84a0140a46b; from 2c86a1305c1406f45ea780d06953c484ea1d9e6e before bd70d0b28010d560a8be96b44fea86fe2ba016ae; from 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 before 18e27df4f2b4e257c317ba8076f31a888f6cc64b; from af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 before 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c; from 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 before 375806616f8c772c33d40e112530887b37c1a816; from 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 before dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534; and 8 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/66f3e55960698c874b0598277913b478ecd29573
- https://git.kernel.org/stable/c/720a297b334e85d34099e83d1f375b92c3efedd6
- https://git.kernel.org/stable/c/b653289ca6460a6552c8590b75dfa84a0140a46b
- https://git.kernel.org/stable/c/bd70d0b28010d560a8be96b44fea86fe2ba016ae
- https://git.kernel.org/stable/c/18e27df4f2b4e257c317ba8076f31a888f6cc64b
- https://git.kernel.org/stable/c/0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c
- https://git.kernel.org/stable/c/375806616f8c772c33d40e112530887b37c1a816
- https://git.kernel.org/stable/c/dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.