Vulnerability-Lookup

FKIE_CVE-2025-39716

Vulnerability from fkie_nvd - Published: 2025-09-05 18:15 - Updated: 2026-01-07 19:41

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: parisc: Revise __get_user() to probe user read access Because of the way read access support is implemented, read access interruptions are only triggered at privilege levels 2 and 3. The kernel executes at privilege level 0, so __get_user() never triggers a read access interruption (code 26). Thus, it is currently possible for user code to access a read protected address via a system call. Fix this by probing read access rights at privilege level 3 (PRIV_USER) and setting __gu_err to -EFAULT (-14) if access isn't allowed. Note the cmpiclr instruction does a 32-bit compare because COND macro doesn't work inside asm.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/28a9b71671fb4a2993ef85b8ef6f117ea63894fe	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4c981077255acc2ed5b3df6e8dd0125c81b626a9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/741b163e440683195b8fd4fc8495fcd0105c6ab7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/89f686a0fb6e473a876a9a60a13aec67a62b9a7e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f410ef9a032caf98117256b22139c31342d7bb06	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	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
debian	debian_linux	11.0

JSON

To clipboard

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    }
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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}

CVE-2025-39716 (GCVE-0-2025-39716)

Vulnerability from cvelistv5 – Published: 2025-09-05 17:21 – Updated: 2026-01-02 15:31

Title

parisc: Revise __get_user() to probe user read access

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/28a9b71671fb4a299…
	https://git.kernel.org/stable/c/4c981077255acc2ed…
	https://git.kernel.org/stable/c/f410ef9a032caf981…
	https://git.kernel.org/stable/c/741b163e440683195…
	https://git.kernel.org/stable/c/89f686a0fb6e473a8…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 28a9b71671fb4a2993ef85b8ef6f117ea63894fe (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4c981077255acc2ed5b3df6e8dd0125c81b626a9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f410ef9a032caf98117256b22139c31342d7bb06 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 741b163e440683195b8fd4fc8495fcd0105c6ab7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 89f686a0fb6e473a876a9a60a13aec67a62b9a7e (git)

Linux

Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (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-2025-39716

CVE-2025-39716 (GCVE-0-2025-39716)

Tags

Sightings

Nomenclature