CVE-2023-53176
serial: 8250: Reinit port->pm on port specific driver unbind
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a serial port hardware specific 8250 driver, the generic serial8250 driver takes over the port. After that we see an oops about 10 seconds later. This can produce the following at least on some TI SoCs: Unhandled fault: imprecise external abort (0x1406) Internal error: : 1406 [#1] SMP ARM Turns out that we may still have the serial port hardware specific driver port->pm in use, and serial8250_pm() tries to call it after the port specific driver is gone: serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base] uart_change_pm [serial_base] from uart_hangup+0x154/0x198 [serial_base] uart_hangup [serial_base] from __tty_hangup.part.0+0x328/0x37c __tty_hangup.part.0 from disassociate_ctty+0x154/0x20c disassociate_ctty from do_exit+0x744/0xaac do_exit from do_group_exit+0x40/0x8c do_group_exit from __wake_up_parent+0x0/0x1c Let's fix the issue by calling serial8250_set_defaults() in serial8250_unregister_port(). This will set the port back to using the serial8250 default functions, and sets the port->pm to point to serial8250_pm.
Timeline
ID reserved
By Linux
Published
- 13 months later
· 13 months 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < 490bf37eaabb0a857ed1ae8e75d8854e41662f1c
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < c9e080c3005fd183c56ff8f4d75edb5da0765d2c
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < d5cd2928d31042a7c0a01464f9a8d95be736421d
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < 2c86a1305c1406f45ea780d06953c484ea1d9e6e
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308
- affected c161afe9759ddcc174d08e7c4f683d08ac9ba86f – < 04e82793f068d2f0ffe62fcea03d007a8cdc16a7
- affected 2.6.37
- unaffected < 2.6.37
- unaffected 4.14.316 – ≤ 4.14.*
- unaffected 4.19.284 – ≤ 4.19.*
- unaffected 5.4.244 – ≤ 5.4.*
- unaffected 5.10.181 – ≤ 5.10.*
- unaffected 5.15.113 – ≤ 5.15.*
- unaffected 6.1.30 – ≤ 6.1.*
- unaffected 6.3.4 – ≤ 6.3.*
- unaffected 6.4 – ≤ *
References (8)
- https://git.kernel.org/stable/c/490bf37eaabb0a857ed1ae8e75d8854e41662f1c (opens in a new tab)
- https://git.kernel.org/stable/c/c9e080c3005fd183c56ff8f4d75edb5da0765d2c (opens in a new tab)
- https://git.kernel.org/stable/c/d5cd2928d31042a7c0a01464f9a8d95be736421d (opens in a new tab)
- https://git.kernel.org/stable/c/2c86a1305c1406f45ea780d06953c484ea1d9e6e (opens in a new tab)
- https://git.kernel.org/stable/c/1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 (opens in a new tab)
- https://git.kernel.org/stable/c/af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 (opens in a new tab)
- https://git.kernel.org/stable/c/8e596aed5f2f98cf3e6e98d6fe1d689f4a319308 (opens in a new tab)
- https://git.kernel.org/stable/c/04e82793f068d2f0ffe62fcea03d007a8cdc16a7 (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)
- 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://trackcve.app/cve/CVE-2023-53176)Record last updated .