CVE-2026-77014: Numeric Truncation Error in Red Hat Red Hat Enterprise Linux 10
CVE-2026-77014 is a numeric truncation vulnerability in libsoup's SoupServer HTTP Range header processing on Red Hat Enterprise Linux 10. The flaw causes a 64-bit subtraction result to be truncated to a 32-bit integer, flipping the sign for range offsets differing by more than INT_MAX. This results in silent omission of requested byte ranges from HTTP 206 Partial Content responses when serving resources larger than approximately 2 GB. The vulnerability has a medium severity with a CVSS score of 5.3 and impacts data integrity by omitting requested content ranges without indication. No patch or mitigation is currently available from Red Hat.
AI Analysis
Technical Summary
The vulnerability in libsoup's SoupServer HTTP Range header processing arises from the sort_ranges() comparator truncating a 64-bit subtraction result to a 32-bit int. This truncation flips the sign for range offsets differing by more than INT_MAX, causing the server to silently omit requested byte ranges in HTTP 206 Partial Content responses for resources larger than about 2 GB. This numeric truncation error (CWE-197) affects data integrity by delivering incomplete content without error. Exploitation requires the server to serve large resources, limiting real-world impact. Red Hat has published an advisory but currently provides no fix or mitigation for this issue.
Potential Impact
The vulnerability allows a remote attacker to cause the server to silently omit requested byte ranges in HTTP 206 Partial Content responses, impacting data integrity. There is no impact on confidentiality or availability. The flaw affects responses for resources larger than approximately 2 GB. Because the omission is silent, clients may receive incomplete data without indication of the error.
Mitigation Recommendations
Red Hat's advisory states that no mitigation is currently available for this vulnerability. Users should monitor the Red Hat advisory for updates regarding patches or fixes. Since no official fix or workaround exists, affected systems should be evaluated for risk based on their use of libsoup and serving of large resources.
CVE-2026-77014: Numeric Truncation Error in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-77014 is a numeric truncation vulnerability in libsoup's SoupServer HTTP Range header processing on Red Hat Enterprise Linux 10. The flaw causes a 64-bit subtraction result to be truncated to a 32-bit integer, flipping the sign for range offsets differing by more than INT_MAX. This results in silent omission of requested byte ranges from HTTP 206 Partial Content responses when serving resources larger than approximately 2 GB. The vulnerability has a medium severity with a CVSS score of 5.3 and impacts data integrity by omitting requested content ranges without indication. No patch or mitigation is currently available from Red Hat.
CVSS v3.1
Score 5.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in libsoup's SoupServer HTTP Range header processing arises from the sort_ranges() comparator truncating a 64-bit subtraction result to a 32-bit int. This truncation flips the sign for range offsets differing by more than INT_MAX, causing the server to silently omit requested byte ranges in HTTP 206 Partial Content responses for resources larger than about 2 GB. This numeric truncation error (CWE-197) affects data integrity by delivering incomplete content without error. Exploitation requires the server to serve large resources, limiting real-world impact. Red Hat has published an advisory but currently provides no fix or mitigation for this issue.
Potential Impact
The vulnerability allows a remote attacker to cause the server to silently omit requested byte ranges in HTTP 206 Partial Content responses, impacting data integrity. There is no impact on confidentiality or availability. The flaw affects responses for resources larger than approximately 2 GB. Because the omission is silent, clients may receive incomplete data without indication of the error.
Mitigation Recommendations
Red Hat's advisory states that no mitigation is currently available for this vulnerability. Users should monitor the Red Hat advisory for updates regarding patches or fixes. Since no official fix or workaround exists, affected systems should be evaluated for risk based on their use of libsoup and serving of large resources.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-08-20T07:46:57.481Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-77014","vendor":"Red Hat"}]
Threat ID: 6a86bcd9acd9273b495abbc0
Added to database: 08/20/2026, 08:37:45 UTC
Last enriched: 08/20/2026, 08:52:12 UTC
Last updated: 08/20/2026, 08:52:12 UTC
Views: 4
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