7.8

CVE-2023-54220: serial: 8250: Fix oops for port->pm on uart_change_pm()

Deferred
AliasesUBUNTU-CVE-2023-54220DEBIAN-CVE-2023-54220
Published 30-12-2025Last modified 15-10-2026

Vulnerability summary

CVE-2023-54220 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 9
SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1SUSE-SU-2026:0315-1SUSE-SU-2026:0316-1SUSE-SU-2026:20477-1

Timeline

  1. 30-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.15% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu120 products
  • linux< 5.4.0-169.187 | < 5.15.0-91.101
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1116.126 | < 5.15.0-1051.56
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.52-1 | < 6.4.13-1
Linux1 product
  • linux≥ 490bf37eaabb0a857ed1ae8e75d8854e41662f1c, < 66f3e55960698c874b0598277913b478ecd29573 | ≥ c9e080c3005fd183c56ff8f4d75edb5da0765d2c, < 720a297b334e85d34099e83d1f375b92c3efedd6 | ≥ d5cd2928d31042a7c0a01464f9a8d95be736421d, < b653289ca6460a6552c8590b75dfa84a0140a46b | ≥ 2c86a1305c1406f45ea780d06953c484ea1d9e6e, < bd70d0b28010d560a8be96b44fea86fe2ba016ae | ≥ 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41, < 18e27df4f2b4e257c317ba8076f31a888f6cc64b | ≥ af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872, < 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c | ≥ 04e82793f068d2f0ffe62fcea03d007a8cdc16a7, < 375806616f8c772c33d40e112530887b37c1a816 | ≥ 04e82793f068d2f0ffe62fcea03d007a8cdc16a7, < dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534 | 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308 | ≥ 4.14.316, < 4.14.324 | ≥ 4.19.284, < 4.19.293 | ≥ 5.4.244, < 5.4.255 | ≥ 5.10.181, < 5.10.192 | ≥ 5.15.113, < 5.15.128 | ≥ 6.1.30, < 6.1.47 | ≥ 6.3.4, < 6.4 | 6.4

3 vendors · 122 products

References

12 links
Show all 12 references