CVE catalog
CVE-2026-85769
A flaw was found in libtpms, a library that provides software TPM 2.0 emulation. When restoring TPM 2.0 state (for example during a virtual machine's power-on or state/migration restore), a malformed
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.42% · Oct 25, 2026
A flaw was found in libtpms, a library that provides software TPM 2.0 emulation. When restoring TPM 2.0 state (for example during a virtual machine's power-on or state/migration restore), a malformed state blob can supply an oversized skip-block length that is not validated against the remaining size of the input buffer. This can drive an internal size counter negative, which bypasses a subsequent bounds check due to an unsafe signed-to-unsigned conversion, causing the parser to read memory outside the bounds of the heap buffer holding the state data. Successful exploitation can crash the process hosting libtpms (such as swtpm), resulting in a denial of service of the emulated TPM device and the virtual machine that depends on it. No data corruption or information disclosure was confirmed.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libtpms | sid | 0.10.2-5 | vulnerable |
| Debian | libtpms | forky | 0.10.2-5 | vulnerable |
| Debian | libtpms | trixie | 0.9.2-3.2 | vulnerable |
| Debian | libtpms | bookworm | 0.9.2-3.1+deb12u1 | vulnerable |
| Debian | libtpms | bookworm-security | 0.9.2-3.1~deb12u1 | vulnerable |
| Suse | libtpms | linux micro 6.1 | 0.9.6-slfo.1.1_3.1 | fixed |
| Suse | libtpms | linux enterprise module for server applications 15 sp7 | 0.9.6-150600.3.6.1 | fixed |
| Suse | libtpms | linux micro 6.0 | 0.9.6-3.1 | fixed |
| Opensuse | libtpms | tumbleweed | 0.10.2-2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libtpms | source | sid | (unfixed) | not yet assigned | Not reported | [1146880] |
| Debian | libtpms | source | forky | (unfixed) | not yet assigned | Not reported | [1146880] |
| Debian | libtpms | source | trixie | (unfixed) | not yet assigned | Not reported | [1146880] |
| Debian | libtpms | source | bookworm | (unfixed) | not yet assigned | Not reported | [1146880] |
| Suse | libtpms | rpm | linux micro 6.1 | 0.9.6-slfo.1.1_3.1 | Not reported | SUSE-SU-2026:23926-1 | Not reported |
| Suse | libtpms | rpm | linux enterprise module for server applications 15 sp7 | 0.9.6-150600.3.6.1 | Not reported | SUSE-SU-2026:4363-1 | Not reported |
| Suse | libtpms | rpm | linux micro 6.0 | 0.9.6-3.1 | Not reported | SUSE-SU-2026:23878-1 | Not reported |
| Opensuse | libtpms | rpm | tumbleweed | 0.10.2-2.1 | Not reported | OPENSUSE-SU-2026:11836-1 | Not reported |
Notes
[trixie] libtpms: Minor issue [bookworm] libtpms: Minor issue, OOB read
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libtpms0]Affected
Source package: [libtpms]
Details (4)
0.9.2-3.1+deb12u1· amd64 · bookwormAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
0.9.2-3.1+deb12u1· arm64 · bookwormAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
0.9.2-3.1~deb12u1· amd64 · bookworm-securityAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
0.9.2-3.1~deb12u1· arm64 · bookworm-securityAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
- [libtpms-dev]Affected
Source package: [libtpms]
Details (4)
0.9.2-3.1+deb12u1· amd64 · bookwormAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
0.9.2-3.1+deb12u1· arm64 · bookwormAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
0.9.2-3.1~deb12u1· amd64 · bookworm-securityAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
0.9.2-3.1~deb12u1· arm64 · bookworm-securityAffected
nvd · libtpms · debian · bookworm; nvd · libtpms · debian · 12
[Debian 13 (Trixie)]
- [libtpms0]Affected
Source package: [libtpms]
Details (2)
0.9.2-3.2· amd64 · trixieAffected
nvd · libtpms · debian · 13
0.9.2-3.2· arm64 · trixieAffected
nvd · libtpms · debian · 13
- [libtpms-dev]Affected
Source package: [libtpms]
Details (2)
0.9.2-3.2· amd64 · trixieAffected
nvd · libtpms · debian · 13
0.9.2-3.2· arm64 · trixieAffected
nvd · libtpms · debian · 13
[openSUSE Tumbleweed]
- [libtpms0]Unknown
Source package: [libtpms]
Details (1)
0.10.2-1.4· x86_64 · tumbleweedUnknown · Fixed:
0.10.2-2.1Version impact unknown
nvd · libtpms · opensuse · tumbleweed
- [libtpms-devel]Unknown
Source package: [libtpms]
Details (1)
0.10.2-1.4· x86_64 · tumbleweedUnknown · Fixed:
0.10.2-2.1Version impact unknown
nvd · libtpms · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11836-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-85769]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-85769]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23878-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23926-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:4363-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11836-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-85769]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85769.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3216.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]