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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-54220
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-30 13:16:10 UTC
Updated2026-08-04 11:16:37 UTC
DescriptionIn 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().

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001340000 probability, percentile 0.033210000 (date 2026-08-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 490bf37eaabb0a857ed1ae8e75d8854e41662f1c 66f3e55960698c874b0598277913b478ecd29573 git Not specified
CNA Linux Linux affected c9e080c3005fd183c56ff8f4d75edb5da0765d2c 720a297b334e85d34099e83d1f375b92c3efedd6 git Not specified
CNA Linux Linux affected d5cd2928d31042a7c0a01464f9a8d95be736421d b653289ca6460a6552c8590b75dfa84a0140a46b git Not specified
CNA Linux Linux affected 2c86a1305c1406f45ea780d06953c484ea1d9e6e bd70d0b28010d560a8be96b44fea86fe2ba016ae git Not specified
CNA Linux Linux affected 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 18e27df4f2b4e257c317ba8076f31a888f6cc64b git Not specified
CNA Linux Linux affected af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c git Not specified
CNA Linux Linux affected 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 375806616f8c772c33d40e112530887b37c1a816 git Not specified
CNA Linux Linux affected 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534 git Not specified
CNA Linux Linux affected 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308 git Not specified
CNA Linux Linux affected 4.14.316 4.14.324 semver Not specified
CNA Linux Linux affected 4.19.284 4.19.293 semver Not specified
CNA Linux Linux affected 5.4.244 5.4.255 semver Not specified
CNA Linux Linux affected 5.10.181 5.10.192 semver Not specified
CNA Linux Linux affected 5.15.113 5.15.128 semver Not specified
CNA Linux Linux affected 6.1.30 6.1.47 semver Not specified
CNA Linux Linux affected 6.3.4 6.4 semver Not specified
CNA Linux Linux affected 6.4 Not specified
CNA Linux Linux unaffected 6.4 semver Not specified
CNA Linux Linux unaffected 4.14.324 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.293 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.255 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.192 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.128 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.47 6.1.* semver Not specified
CNA Linux Linux unaffected 6.4.12 6.4.* semver Not specified
CNA Linux Linux unaffected 6.5 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/18e27df4f2b4e257c317ba8076f31a888f6cc64b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/375806616f8c772c33d40e112530887b37c1a816 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/720a297b334e85d34099e83d1f375b92c3efedd6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/66f3e55960698c874b0598277913b478ecd29573 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bd70d0b28010d560a8be96b44fea86fe2ba016ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b653289ca6460a6552c8590b75dfa84a0140a46b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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