CVE-2026-63850: linux Improper Input Validation
CVSS: 7.8v3.1HighAwaiting analysis
AliasesUBUNTU-CVE-2026-63850DEBIAN-CVE-2026-63850
Published 19-07-2026Last modified 19-10-2026
Vulnerability summary
CVE-2026-63850 is a high (CVSS 7.8) Improper Input Validation vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.6% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
0.18%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 16 · Related 16Timeline
- 19-07-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v5.0.0 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 49b1fbbb5a071197ee71e2d70959b1cb29bdc317)
CVSS metrics
4 scores · 4 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
+0.03 pp
From 0.14% on 19-09-2026
19-09-202619-10-2026
EPSS score0.18%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu118 products
- linux< 7.0.0-28.28
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 7.0.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.12.94-1 | < 7.0.10-1
Linux1 product
- linux≥ b6d1a06320519ac3bfda6ce81067a1bc409b9cff, < 9f5a1459ecc3195282be617639d710b54779c9dc | ≥ b6d1a06320519ac3bfda6ce81067a1bc409b9cff, < 139a8a52ef4349c62129703b3a3e3a6ae4d634eb | ≥ b6d1a06320519ac3bfda6ce81067a1bc409b9cff, < 2c350f3cd94be847ac216e1358ec7001eaaf0934 | ≥ b6d1a06320519ac3bfda6ce81067a1bc409b9cff, < 8cae0ce77de492d7c31c1532a2e80c0c6e7e58cb | 6.9
3 vendors · 120 products
