CVE-2026-6040A heap use-after-free existed when importing the blank-width characters of an ODF number format.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.
- CVSS
- 7.3 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416, CWE-787, CWE-825
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Deferred
- Record last updated
- Jul 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
No affected products are listed yet.
References
- https://www.libreoffice.org/about-us/security/advisories/cve-2026-6040
- https://access.redhat.com/security/cve/CVE-2026-6040
- https://bugzilla.redhat.com/show_bug.cgi?id=2488966
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6040.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.