OESA-2026-4740

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4740
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-4740.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-4740
Upstream
CVE (2)
Published
2026-11-11T12:25:42Z
Modified
2026-11-11T12:45:03Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
python-pillow security update
Details

Pillow is the friendly PIL fork by Alex Clark and Contributors. PIL is the Python Imaging \ Library by Fredrik Lundh and Contributors. As of 2019, Pillow development is supported by Tidelift. of CVE-2022-22815,CVE-2022-22816)

Security Fix(es):

Pillow is a Python imaging library. From 9.1.0 until 13.0.0, Pillow can disclose uninitialized stack memory when Image.quantize() uses an empty palette. ImagingPaletteCacheUpdate() leaves a local cache array uninitialized when the palette has zero entries, and the conversion path emits those bytes as output pixel indices. An attacker who controls the palette image can obtain stack contents from a returned PNG or GIF. This can disclose addresses and stack-canary data without an out-of-bounds access, memory corruption, or process crash. This issue is fixed in version 13.0.0.(CVE-2026-112898)

Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.(CVE-2026-96638)

Database specific 
{
    "severity": "Medium"
}
References

Affected packages

openEuler:24.03-LTS-SP4 / python-pillow

Package

Name
python-pillow
Purl
pkg:rpm/openEuler/python-pillow&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
10.3.0-15.oe2403sp4

Ecosystem specific 

{
    "aarch64": [
        "python-pillow-debuginfo-10.3.0-15.oe2403sp4.aarch64.rpm",
        "python-pillow-debugsource-10.3.0-15.oe2403sp4.aarch64.rpm",
        "python3-pillow-10.3.0-15.oe2403sp4.aarch64.rpm",
        "python3-pillow-devel-10.3.0-15.oe2403sp4.aarch64.rpm",
        "python3-pillow-qt-10.3.0-15.oe2403sp4.aarch64.rpm",
        "python3-pillow-tk-10.3.0-15.oe2403sp4.aarch64.rpm"
    ],
    "noarch": [
        "python3-pillow-help-10.3.0-15.oe2403sp4.noarch.rpm"
    ],
    "src": [
        "python-pillow-10.3.0-15.oe2403sp4.src.rpm"
    ],
    "x86_64": [
        "python-pillow-debuginfo-10.3.0-15.oe2403sp4.x86_64.rpm",
        "python-pillow-debugsource-10.3.0-15.oe2403sp4.x86_64.rpm",
        "python3-pillow-10.3.0-15.oe2403sp4.x86_64.rpm",
        "python3-pillow-devel-10.3.0-15.oe2403sp4.x86_64.rpm",
        "python3-pillow-qt-10.3.0-15.oe2403sp4.x86_64.rpm",
        "python3-pillow-tk-10.3.0-15.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4740.json"