CyberSecBulletin
CVE-2025-38680NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2025-38680 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 9ad554217c9b945031c73df4e8176a475e2dea57, 1e269581b3aa5962fdc52757ab40da286168c087, 8343f3fe0b755925f83d60b05e92bf4396879758 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to 9ad554217c9b945031c73df4e8176a475e2dea57 or 1e269581b3aa5962fdc52757ab40da286168c087 or 8343f3fe0b755925f83d60b05e92bf4396879758 or ffdd82182953df643aa63d999b6f1653d0c93778, whichever matches your release line, or a later version.
  2. Update SIMATIC CN 4100 to V5.0 or a later version.
  3. Update Linux Kernel to 5.4.297 or 5.10.241 or 5.15.190 or 6.1.149, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxc0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, 9ad554217c9b945031c73df4e8176a475e2dea57; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, 1e269581b3aa5962fdc52757ab40da286168c087; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, 8343f3fe0b755925f83d60b05e92bf4396879758; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, ffdd82182953df643aa63d999b6f1653d0c93778; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, a97e062e4ff3dab84a2f1eb811e9eddc6699e2a9; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, cac702a439050df65272c49184aef7975fe3eff2; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, 424980d33b3f816485513e538610168b03fab9f1; c0efd232929c2cd87238de2cccdaf4e845be5b0c up to, but not including, 6d4a7c0b296162354b6fc759a1475b9d57ddfaa6; and 2 more ranges9ad554217c9b945031c73df4e8176a475e2dea57, 1e269581b3aa5962fdc52757ab40da286168c087, 8343f3fe0b755925f83d60b05e92bf4396879758, ffdd82182953df643aa63d999b6f1653d0c93778, a97e062e4ff3dab84a2f1eb811e9eddc6699e2a9, cac702a439050df65272c49184aef7975fe3eff2
SiemensSIMATIC CN 4100before V5.0V5.0
LinuxLinux Kernel2.6.27 up to, but not including, 5.4.297; 5.5 up to, but not including, 5.10.241; 5.11 up to, but not including, 5.15.190; 5.16 up to, but not including, 6.1.149; 6.2 up to, but not including, 6.6.103; 6.7 up to, but not including, 6.12.43; 6.13 up to, but not including, 6.15.11; 6.16 up to, but not including, 6.16.2; and 1 more ranges5.4.297, 5.10.241, 5.15.190, 6.1.149, 6.6.103, 6.12.43
DebianDebian Linux11.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.

Official description

In the Linux kernel, the following vulnerability has been resolved: media: uvcvideo: Fix 1-byte out-of-bounds read in uvc_parse_format() The buffer length check before calling uvc_parse_format() only ensured that the buffer has at least 3 bytes (buflen > 2), buf the function accesses buffer[3], requiring at least 4 bytes. This can lead to an out-of-bounds read if the buffer has exactly 3 bytes. Fix it by checking that the buffer has at least 4 bytes in uvc_parse_format().

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Out-of-bounds Read vulnerabilities

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