Vulnerability-Lookup

FKIE_CVE-2025-38665

Vulnerability from fkie_nvd - Published: 2025-08-22 16:15 - Updated: 2026-01-07 17:32

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode Andrei Lalaev reported a NULL pointer deref when a CAN device is restarted from Bus Off and the driver does not implement the struct can_priv::do_set_mode callback. There are 2 code path that call struct can_priv::do_set_mode: - directly by a manual restart from the user space, via can_changelink() - delayed automatic restart after bus off (deactivated by default) To prevent the NULL pointer deference, refuse a manual restart or configure the automatic restart delay in can_changelink() and report the error via extack to user space. As an additional safety measure let can_restart() return an error if can_priv::do_set_mode is not set instead of dereferencing it unchecked.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6acceb46180f9e160d4f0c56fcaf39ba562822ae	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6bbcf37c5114926c99a1d1e6993a5b35689d2599	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c1f3f9797c1f44a762e6f5f72520b2e520537b52	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cf81a60a973358dea163f6b14062f17831ceb894	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
debian	debian_linux	11.0

JSON

To clipboard

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode\n\nAndrei Lalaev reported a NULL pointer deref when a CAN device is\nrestarted from Bus Off and the driver does not implement the struct\ncan_priv::do_set_mode callback.\n\nThere are 2 code path that call struct can_priv::do_set_mode:\n- directly by a manual restart from the user space, via\n  can_changelink()\n- delayed automatic restart after bus off (deactivated by default)\n\nTo prevent the NULL pointer deference, refuse a manual restart or\nconfigure the automatic restart delay in can_changelink() and report\nthe error via extack to user space.\n\nAs an additional safety measure let can_restart() return an error if\ncan_priv::do_set_mode is not set instead of dereferencing it\nunchecked."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: netlink: can_changelink(): corrige la desreferencia del puntero NULL de struct can_priv::do_set_mode Andrei Lalaev inform\u00f3 de una desreferencia del puntero NULL cuando un dispositivo CAN se reinicia desde Bus Off y el controlador no implementa la devoluci\u00f3n de llamada struct can_priv::do_set_mode. Hay 2 rutas de c\u00f3digo que llaman a struct can_priv::do_set_mode: - directamente mediante un reinicio manual desde el espacio de usuario, a trav\u00e9s de can_changelink() - reinicio autom\u00e1tico retrasado despu\u00e9s de apagar el bus (desactivado de forma predeterminada) Para evitar la deferencia del puntero NULL, rechace un reinicio manual o configure el retraso del reinicio autom\u00e1tico en can_changelink() e informe del error a trav\u00e9s de extack al espacio de usuario. Como medida de seguridad adicional, deje que can_restart() devuelva un error si can_priv::do_set_mode no est\u00e1 configurado en lugar de desreferenciarlo sin marcar."
    }
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          "attackVector": "LOCAL",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
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        "impactScore": 3.6,
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}

CVE-2025-38665 (GCVE-0-2025-38665)

Vulnerability from cvelistv5 – Published: 2025-08-22 16:02 – Updated: 2025-11-03 17:40

Title

can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/6bbcf37c5114926c9…
	https://git.kernel.org/stable/c/cf81a60a973358dea…
	https://git.kernel.org/stable/c/0ca816a96fdcf3264…
	https://git.kernel.org/stable/c/6acceb46180f9e160…
	https://git.kernel.org/stable/c/c1f3f9797c1f44a76…

Impacted products

Vendor

Product

Version

Linux

Affected: 39549eef3587f1c1e8c65c88a2400d10fd30ea17 , < 6bbcf37c5114926c99a1d1e6993a5b35689d2599 (git)
Affected: 39549eef3587f1c1e8c65c88a2400d10fd30ea17 , < cf81a60a973358dea163f6b14062f17831ceb894 (git)
Affected: 39549eef3587f1c1e8c65c88a2400d10fd30ea17 , < 0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5 (git)
Affected: 39549eef3587f1c1e8c65c88a2400d10fd30ea17 , < 6acceb46180f9e160d4f0c56fcaf39ba562822ae (git)
Affected: 39549eef3587f1c1e8c65c88a2400d10fd30ea17 , < c1f3f9797c1f44a762e6f5f72520b2e520537b52 (git)

Linux

Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 6.1.148 , ≤ 6.1.* (semver)
Unaffected: 6.6.101 , ≤ 6.6.* (semver)
Unaffected: 6.12.41 , ≤ 6.12.* (semver)
Unaffected: 6.15.9 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-38665

CVE-2025-38665 (GCVE-0-2025-38665)

Tags

Sightings

Nomenclature