CyberSecBulletin
CVE-2026-63846NVD status: Modified

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set…

Published Updated By the CyberSecBulletin desk

CVE-2026-63846 is a high-severity improper input validation vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 34d72bb699305992d3190220e331a95bfd3e9f7f, ee035a9d3eed3a9f5a3e83c31a10b321c9598861, 303da8279f195cc741adc52c1b44d6b64de63bb0 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 0.18% 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 34d72bb699305992d3190220e331a95bfd3e9f7f or ee035a9d3eed3a9f5a3e83c31a10b321c9598861 or 303da8279f195cc741adc52c1b44d6b64de63bb0 or 5ada37d7f736f9feeaa06a25e470a4c74e67a61a, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.6.141 or 6.12.91 or 6.18.33 or 7.0.10, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxdfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 up to, but not including, 34d72bb699305992d3190220e331a95bfd3e9f7f; dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 up to, but not including, ee035a9d3eed3a9f5a3e83c31a10b321c9598861; dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 up to, but not including, 303da8279f195cc741adc52c1b44d6b64de63bb0; dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 up to, but not including, 5ada37d7f736f9feeaa06a25e470a4c74e67a61a; dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 up to, but not including, 48ce00787e3fddd2b45692fc991b8ab128343da5; dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 up to, but not including, a2baf12eec41f246689e6a3f8619af1200031576; 5.934d72bb699305992d3190220e331a95bfd3e9f7f, ee035a9d3eed3a9f5a3e83c31a10b321c9598861, 303da8279f195cc741adc52c1b44d6b64de63bb0, 5ada37d7f736f9feeaa06a25e470a4c74e67a61a, 48ce00787e3fddd2b45692fc991b8ab128343da5, a2baf12eec41f246689e6a3f8619af1200031576
LinuxLinux Kernel5.9 up to, but not including, 6.6.141; 6.7 up to, but not including, 6.12.91; 6.13 up to, but not including, 6.18.33; 6.19 up to, but not including, 7.0.10; 7.16.6.141, 6.12.91, 6.18.33, 7.0.10

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
HighData or code can be modified at will.
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:H/A:H. Scored by CNA.

Official description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)

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

The underlying weakness: Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How developers prevent this class of flaw

  • Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build recognizers for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of allowing parser code to be scattered throughout the program, where it could be subject to errors or inconsistencies that create weaknesses.
  • Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
  • Understand all the potential areas where untrusted inputs can enter the product, including but not limited to: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.

More Improper Input Validation vulnerabilities (CWE-20)

Timeline

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

References

Recent Improper Input Validation vulnerabilities

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