Icu: stack buffer overflow in the srbroot::addtag function
Priority LOW 33CWE-120Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 18 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.
Summary
A stack buffer overflow was found in Internationl components for unicode (ICU ). While running the genrb binary, the 'subtag' struct overflowed at the SRBRoot::addTag function. This issue may lead to memory corruption and local arbitrary code execution.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00439 38th percentileScored 2026-11-07
Fix Partial icu: 78.1Red Hat: 13 advisoriesRed Hat: 18 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | icu | before 78.1 | 78.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | 74.2-5.el10_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 67.1-10.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 67.1-10.el9_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | 67.1-10.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 67.1-10.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 67.1-10.el9_4 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — | 413.92.202609080414-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — | 414.92.202608172040-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | 415.92.202608180329-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — | 416.94.202608150307-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — | 417.94.202608250221-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — | 418.94.202608111829-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — | 4.19.9.6.202608120446-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — | 4.20.9.6.202608121719-0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | Not affected | CNA |
- icu Vendor— Affected before 78.1 Fixed in 78.1 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 74.2-5.el10_0 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 67.1-10.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 67.1-10.el9_6 Patch available CNA
- Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 67.1-10.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 67.1-10.el9_2 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 67.1-10.el9_4 Patch available CNA
- Red Hat OpenShift Container Platform 4.13 VendorRed Hat Affected — Fixed in 413.92.202609080414-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.14 VendorRed Hat Affected — Fixed in 414.92.202608172040-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.15 VendorRed Hat Affected — Fixed in 415.92.202608180329-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.16 VendorRed Hat Affected — Fixed in 416.94.202608150307-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.17 VendorRed Hat Affected — Fixed in 417.94.202608250221-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.18 VendorRed Hat Affected — Fixed in 418.94.202608111829-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.19 VendorRed Hat Affected — Fixed in 4.19.9.6.202608120446-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.20 VendorRed Hat Affected — Fixed in 4.20.9.6.202608121719-0 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
Remediation
- Fix · CNA icu Fixed in 78.1
Red Hat 13 advisories
- RHSA-2026:65839 Released 2026-09-17 · Red Hat rating ImportantOpenShift Container Platform 4.13.71 bug fix and security update
- Red Hat OpenShift Container Platform 4.13 rhcos-x86_64-413.92.202609080414-0
- RHSA-2026:60019 Released 2026-09-03 · Red Hat rating ImportantOpenShift Container Platform 4.17.57 bug fix and security update
- Red Hat OpenShift Container Platform 4.17 rhcos-aarch64-417.94.202608250221-0, rhcos-ppc64le-417.94.202608250221-0, rhcos-s390x-417.94.202608250221-0 +1
- RHSA-2026:56853 Released 2026-08-31 · Red Hat rating ImportantOpenShift Container Platform 4.16.69 bug fix and security update
- Red Hat OpenShift Container Platform 4.16 rhcos-aarch64-416.94.202608150307-0, rhcos-ppc64le-416.94.202608150307-0, rhcos-s390x-416.94.202608150307-0 +1
Show 10 more Red Hat advisories
- RHSA-2026:56786 Released 2026-08-31 · Red Hat rating ImportantOpenShift Container Platform 4.14.72 bug fix and security update
- Red Hat OpenShift Container Platform 4.14 rhcos-aarch64-414.92.202608172040-0, rhcos-ppc64le-414.92.202608172040-0, rhcos-s390x-414.92.202608172040-0 +1
- RHSA-2026:56911 Released 2026-08-31 · Red Hat rating ImportantOpenShift Container Platform 4.15.68 bug fix and security update
- Red Hat OpenShift Container Platform 4.15 rhcos-aarch64-415.92.202608180329-0, rhcos-ppc64le-415.92.202608180329-0, rhcos-s390x-415.92.202608180329-0 +1
- RHSA-2026:54553 Released 2026-08-19 · Red Hat rating ImportantOpenShift Container Platform 4.19.43 bug fix and security update
- Red Hat OpenShift Container Platform 4.19 rhcos-aarch64-4.19.9.6.202608120446-0, rhcos-ppc64le-4.19.9.6.202608120446-0, rhcos-s390x-4.19.9.6.202608120446-0 +1
- RHSA-2026:54544 Released 2026-08-19 · Red Hat rating ImportantOpenShift Container Platform 4.18.53 bug fix and security update
- Red Hat OpenShift Container Platform 4.18 rhcos-aarch64-418.94.202608111829-0, rhcos-ppc64le-418.94.202608111829-0, rhcos-s390x-418.94.202608111829-0 +1
- RHSA-2026:54581 Released 2026-08-18 · Red Hat rating ImportantOpenShift Container Platform 4.20.34 bug fix and security update
- Red Hat OpenShift Container Platform 4.20 rhcos-aarch64-4.20.9.6.202608121719-0, rhcos-ppc64le-4.20.9.6.202608121719-0, rhcos-s390x-4.20.9.6.202608121719-0 +1
- RHSA-2025:12332 Released 2025-07-31 · Red Hat rating Moderateicu security update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) icu-67.1-10.el9_4, libicu-devel-67.1-10.el9_4
- Red Hat Enterprise Linux BaseOS EUS (v.9.4) icu-67.1-10.el9_4, libicu-67.1-10.el9_4
- RHSA-2025:12333 Released 2025-07-31 · Red Hat rating Moderateicu security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) icu-67.1-10.el9_0, libicu-devel-67.1-10.el9_0
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) icu-67.1-10.el9_0, libicu-67.1-10.el9_0
- RHSA-2025:12331 Released 2025-07-31 · Red Hat rating Moderateicu security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) icu-67.1-10.el9_2, libicu-devel-67.1-10.el9_2
- Red Hat Enterprise Linux BaseOS E4S (v.9.2) icu-67.1-10.el9_2, libicu-67.1-10.el9_2
- RHSA-2025:12083 Released 2025-07-29 · Red Hat rating Moderateicu security update
- Red Hat Enterprise Linux AppStream (v. 9) icu-67.1-10.el9_6, libicu-devel-67.1-10.el9_6
- Red Hat Enterprise Linux BaseOS (v. 9) icu-67.1-10.el9_6, libicu-67.1-10.el9_6
- RHSA-2025:11888 Released 2025-07-28 · Red Hat rating Moderateicu security update
- Red Hat Enterprise Linux AppStream (v. 10) icu-74.2-5.el10_0, libicu-devel-74.2-5.el10_0
- Red Hat Enterprise Linux BaseOS (v. 10) icu-74.2-5.el10_0, libicu-74.2-5.el10_0
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2025:11888 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:12083 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:12333 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2025:12331 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:12332 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2025:11888 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2025:12083 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:12333 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2025:12331 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | RHSA-2025:12332 |
| Red Hat OpenShift Container Platform 4.13 | Fixed | RHSA-2026:65839 |
| Red Hat OpenShift Container Platform 4.14 | Fixed | RHSA-2026:56786 |
| Red Hat OpenShift Container Platform 4.15 | Fixed | RHSA-2026:56911 |
| Red Hat OpenShift Container Platform 4.16 | Fixed | RHSA-2026:56853 |
| Red Hat OpenShift Container Platform 4.17 | Fixed | RHSA-2026:60019 |
| Red Hat OpenShift Container Platform 4.18 | Fixed | RHSA-2026:54544 |
| Red Hat OpenShift Container Platform 4.19 | Fixed | RHSA-2026:54553 |
| Red Hat OpenShift Container Platform 4.20 | Fixed | RHSA-2026:54581 |
Not affected: 1 product
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2025-5222
- 2026-10-03 Alias added: GHSA-wv79-2fc4-v4hj
- 2026-10-09 Fix available: openshift/[email protected], openshift/[email protected], openshift/[email protected] +5 · CNA
- 2026-10-21 Affected versions changed · CNA
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-21 Affected versions changed · CNA
- 2026-10-22 Affected versions changed · Red Hat
References
Advisory 14
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Sources
- CVE-2025-5222 · CVE Program
- CVE-2025-5222 · NVD
- FIRST EPSS
- GHSA-wv79-2fc4-v4hj · GitHub Advisory Database · CC BY 4.0
- CVE-2025-5222 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences