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CVE Record

CVE-2025-4945: Libsoup: integer overflow in cookie expiration date handling in libsoup

A flaw was found in the cookie parsing logic of the libsoup HTTP library, used in GNOME applications and other software. The vulnerability arises when processing the expiration date of cookies, where a specially crafted value can trigger an integer overflow. This may result in undefined behavior, allowing an attacker to bypass cookie expiration logic, causing persistent or unintended cookie behavior. The issue stems from improper validation of large integer inputs during date arithmetic operations within the cookie parsing routines.

LowCVSS 3.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2025-4945 is a low-severity libsoup flaw where a specially crafted cookie expiration date can confuse date handling. The main business impact is integrity of cookie behavior: cookies may last longer than intended or behave unexpectedly. It is not described as data theft, service outage, or actively exploited in the supplied sources.

Executive priority

Treat this as routine patch management, not an emergency response. The issue can weaken cookie-expiration integrity, but the supplied evidence shows low severity, no confidentiality or availability impact, and no confirmed active exploitation. Include it in the next standard Linux maintenance cycle unless high-risk apps depend on libsoup cookie handling.

Technical view

libsoup cookie parsing can hit an integer overflow during expiration-date arithmetic, classified as CWE-190. The CVSS 3.1 score is 3.7 with network attack vector, high complexity, no privileges, no user interaction, and low integrity impact. Red Hat lists affected libsoup/libsoup3 packages across several RHEL streams.

Likely exposure

Exposure is most likely on Linux systems or applications using libsoup or libsoup3 cookie handling, especially the listed RHEL 7 ELS, 8, 9, and 10 package streams. RHEL 6 status is listed as unknown. Non-Red Hat exposure is not fully enumerated in the bundle.

Exploitation context

The bundle does not report active exploitation, and KEV status is false. A remote attacker would need a path to provide crafted cookie data to software using libsoup. The high attack complexity and limited integrity impact reduce urgency, but affected managed platforms should still receive vendor updates.

Researcher notes

Focus validation on cookie expiration parsing paths and large integer date handling, without assuming broader memory corruption impact beyond the supplied description. The affected-product evidence is strongest for Red Hat package streams. The bundle does not provide fixed version numbers or exploit telemetry beyond Red Hat advisories and the GNOME issue reference.

Mitigation direction

  • Apply the relevant Red Hat RHSA updates for affected RHEL package streams.
  • Check GNOME/libsoup and operating system vendor guidance for non-Red Hat distributions.
  • Prioritize systems where libsoup processes untrusted remote HTTP cookies.
  • Track RHEL 6 separately because the supplied status is unknown.

Validation and detection

  • Inventory installed libsoup and libsoup3 packages across Linux assets.
  • Compare package streams against the affected Red Hat entries in the source bundle.
  • Confirm applicable Red Hat errata are installed where RHEL is in use.
  • Identify applications that rely on libsoup cookie storage or HTTP session handling.
  • Document exceptions where vendor status remains unknown or unconfirmed.
Prepared
Confidence
medium
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-190: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2025-4945 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Low
CVSS
3.7 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
17Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
3.7CVSS 3.1LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N2.21.4redhat

Vulnerability scoring details

Base CVSS 3.1 score

3.7Low
CVSS 3.1 vector shape for CVE-2025-4945Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineredhat

    Made public.

  2. Source timelineredhat

    Reported to Red Hat.

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Unknown vendorlibsouplibsoup, 0unaffected
Red HatRed Hat Enterprise Linux 10libsoup3, 0:3.6.5-3.el10_0.9affected
Red HatRed Hat Enterprise Linux 10libsoup3, 0:3.6.5-3.el10_1.6affected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Supportlibsoup, 0:2.62.2-9.el7_9affected
Red HatRed Hat Enterprise Linux 8libsoup, 0:2.62.3-10.el8_10affected
Red HatRed Hat Enterprise Linux 8libsoup, 0:2.62.3-10.el8_10affected
Red HatRed Hat Enterprise Linux 8.2 Advanced Update Supportlibsoup, 0:2.62.3-1.el8_2.6affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibsoup, 0:2.62.3-2.el8_4.6affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onlibsoup, 0:2.62.3-2.el8_4.6affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportlibsoup, 0:2.62.3-2.el8_6.6affected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Servicelibsoup, 0:2.62.3-2.el8_6.6affected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutionslibsoup, 0:2.62.3-2.el8_6.6affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionslibsoup, 0:2.62.3-3.el8_8.6affected
Red HatRed Hat Enterprise Linux 9libsoup, 0:2.72.0-10.el9_6.3affected
Red HatRed Hat Enterprise Linux 9libsoup, 0:2.72.0-12.el9_7.1affected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutionslibsoup, 0:2.72.0-8.el9_0.6affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionslibsoup, 0:2.72.0-8.el9_2.6affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportlibsoup, 0:2.72.0-8.el9_4.6affected
Red HatRed Hat Enterprise Linux 6libsoupunknown
Weakness

CWE details

CWE-190

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-190 · source CWE mapping

Integer Overflow or Wraparound

Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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