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VulnerabilityPublished Updated

CVE-2026-102560: Red Hat Enterprise Linux 10 · Out-of-bounds Read

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 8.6 High.

Data as of 13 Nov 2026, 12:10 UTC

CVSS 3.1 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.18.6
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10libsoup3Affected–Fixed in–
Red Hat Enterprise Linux 10libsoup3Affected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update Supportlibsoup3Affected–Fixed in–
Red Hat Enterprise Linux 9libsoupAffected–Fixed in–
Red Hat Enterprise Linux 9libsoupAffected–Fixed in–
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionslibsoupAffected–Fixed in–

AI-suggested

Red Hat advises disabling the permessage-deflate WebSocket extension if it is not required and capping outgoing message sizes to mitigate this vulnerability. Until patched, these configuration changes reduce exposure.

Description

A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.

References

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