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Fencer Vulns
high 7.5

CVE-2026-46603 json

Excessive memory allocation during VP8L decoding in golang.org/x/image

published 2026-08-14 2 mo ago modified 2026-09-03 2 mo ago also GO-2026-6222 , EUVD-2026-58720

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

VP8L decoding in golang.org/x/image/vp8l can allocate an excessive amount of memory when processing a crafted VP8L image containing many unused Huffman tree groups. This allows a remote attacker to cause a denial of service via memory exhaustion.

Patch / fix

  • go golang.org/x/image 0.45.0
  • golang.org/x/image golang.org/x/image/vp8l 0.45.0
  • golang-golang-x-image Debian 14 0.45.0-1

debian advisories DEBIAN-CVE-2026-46603

  • govulncheck-vulndb SLES for SAP applications 16.0, SLES 16.0 0.0.20260827T195228-160000.1.1

suse advisories SUSE-SU-2026:23625-1

  • rclone openSUSE Leap 16.0 1.75.1-bp160.1.1
  • rclone openSUSE Tumbleweed 1.75.1-1.1
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260827T195228-160000.1.1

opensuse advisories openSUSE-SU-2026:21999-1openSUSE-SU-2026:11727-1openSUSE-SU-2026:21761-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-46603 updated cvss 7.5

golang.org/x/image/vp8l: golang.org/x/image/vp8l: Denial of Service via excessive memory allocation

  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-storage-rhel9 4.2.0-28
    fixed: vendor fix RHSA-2026:95360
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 rhacm2/volsync-rhel9 1790103468
    fixed: vendor fix RHSA-2026:71116
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 rhacm2/volsync-rhel9 1790103429
    fixed: vendor fix RHSA-2026:71117
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.2.0-18, cryostat/cryostat-db-rhel9 4.2.0-29, cryostat/jfr-datasource-rhel9 4.2.0-19, cryostat/cryostat-reports-rhel9 4.2.0-19, cryostat/cryostat-rhel9-operator 4.2.0-29, cryostat/cryostat-operator-bundle 4.2.0-15, +3 more Red Hat Advanced Cluster Management for Kubernetes 2.16 rhacm2/volsync-operator-bundle 1790105678 Red Hat Advanced Cluster Management for Kubernetes 2.17 rhacm2/volsync-operator-bundle 1790105605
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go golang.org/x/image
<0.45.0
0.45.0

Affected products

  • golang.org/x/image golang.org/x/image/vp8l

Classification

Weakness
  • CWE-789 Memory Allocation with Excessive Size Value

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.