libwebp: out-of-bounds read in WebPMuxCreateInternal
Published May 21, 2021
9.1
CRITICALCVSS 3.1
EPSS 2.10%
Description
A heap-based buffer overflow was found in libwebp in versions before 1.0.1 in GetLE16().
Affected products
- Vendor n/a Product Libwebp Defaultn/a
- Version libwebp 1.0.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Libwebp | n/a |
|
Configuration 1
- < 1.0.1
Configuration 2
- 8.0
No data.
Red Hat Enterprise Linux 8
libwebp-0:1.0.0-5.el8
Fixed · RHSA-2021:4231
Red Hat Enterprise Linux 7
firefox
Out of support scope
Red Hat Enterprise Linux 7
libwebp
Out of support scope
Red Hat Enterprise Linux 7
qt5-qtimageformats
Out of support scope
Red Hat Enterprise Linux 7
thunderbird
Out of support scope
Red Hat Enterprise Linux 8
firefox
Not affected
Red Hat Enterprise Linux 8
thunderbird
Not affected
Red Hat Enterprise Linux 9
libwebp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | libwebp-0:1.0.0-5.el8 | Fixed | RHSA-2021:4231 |
| Red Hat Enterprise Linux 7 | firefox | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | libwebp | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | qt5-qtimageformats | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Out of support scope | n/a |
| Red Hat Enterprise Linux 8 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 8 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 9 | libwebp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of Firefox and Thunderbird as shipped with Red Hat Enterprise Linux 7, and 8 as they embed the fixed version of libwebp.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.10% (0.02100) | 81.02th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.10% (0.02100) | 79.22th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.12% (0.00123) | 29.04th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.30% (0.00302) | 70.42th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.30% (0.00302) | 68.76th | v3 (v2023.03.01) |
| Feb 4, 2024 | 0.30% (0.00302) | 66.50th | v3 (v2023.03.01) |
| Dec 26, 2023 | 0.27% (0.00273) | 64.59th | v3 (v2023.03.01) |
| Nov 30, 2023 | 0.23% (0.00231) | 61.12th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.21% (0.00207) | 56.87th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.32% (0.01324) | 31.25th | v5 (v2026.06.15) |
| Jun 12, 2021 | 1.10% (0.01105) | 0.00th | v1 |
| Jun 8, 2021 | 0.88% (0.00884) | 0.00th | v1 |
| Jun 6, 2021 | 0.66% (0.00663) | 0.00th | v1 |
| May 22, 2021 | 0.44% (0.00442) | 0.00th | v1 |
References (6)
- https://access.redhat.com/security/cve/CVE-2018-25009 Vendor Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9100 x_refsource_MISCIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1956917 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://chromium.googlesource.com/webm/libwebp/+/95fd65070662e01cc9170c4444f5c0859a710097 x_refsource_MISCPatch
- https://nvd.nist.gov/vuln/detail/CVE-2018-25009
- https://www.cve.org/CVERecord?id=CVE-2018-25009
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-25009 | Vendor Advisory | |
| https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9100 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1956917 | x_refsource_MISCIssue TrackingPatchThird Party Advisory | |
| https://chromium.googlesource.com/webm/libwebp/+/95fd65070662e01cc9170c4444f5c0859a710097 | x_refsource_MISCPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-25009 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-25009 |
Change history (0)
No recorded changes yet.