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alsa-2026:33503
Vulnerability from osv_almalinux
Published
2026-06-30 00:00
Modified
2026-07-01 13:46
Summary
Important: giflib security update
Details
giflib is a library for reading and writing gif images.
Security Fix(es):
- giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension (CVE-2026-26740)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
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"details": "giflib is a library for reading and writing gif images. \n\nSecurity Fix(es): \n\n * giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension (CVE-2026-26740)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:33503",
"modified": "2026-07-01T13:46:48Z",
"published": "2026-06-30T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:33503"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-26740"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2448747"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/8/ALSA-2026-33503.html"
}
],
"related": [
"CVE-2026-26740"
],
"summary": "Important: giflib security update"
}
CVE-2026-26740 (GCVE-0-2026-26740)
Vulnerability from cvelistv5 – Published: 2026-03-18 00:00 – Updated: 2026-07-01 12:04
VLAI
EPSS
Summary
Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.
Severity
8.2 (High)
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-787 - Out-of-bounds Write
Assigner
References
14 references
Impacted products
28 products
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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