LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past its end. In fixed versions the array is sized to hold the largest possible nesting.
Weakness
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | RedHat | libreoffice-1:6.4.7.2-21.el8_10 | * |
| Red Hat Enterprise Linux 9 | RedHat | libreoffice-1:7.1.8.1-15.el9_8.2 | * |
| Libreoffice | Ubuntu | jammy | * |
| Libreoffice | Ubuntu | noble | * |
| Libreoffice | Ubuntu | questing | * |
| Libreoffice | Ubuntu | resolute | * |
| Libreoffice | Ubuntu | upstream | * |
Potential Mitigations
References
- https://www.libreoffice.org/about-us/security/advisories/cve-2026-8357
- https://access.redhat.com/errata/RHSA-2026:35839
- https://access.redhat.com/errata/RHSA-2026:36832
- https://access.redhat.com/security/cve/CVE-2026-8357
- https://bugzilla.redhat.com/show_bug.cgi?id=2488964
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8357.json