CVE catalog
CVE-2026-6727
A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.15% · Oct 25, 2026
A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011.
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 |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libtpms | source | sid | (unfixed) | unimportant | Not reported | Not reported |
| Debian | libtpms | source | forky | (unfixed) | unimportant | Not reported | Not reported |
| Debian | libtpms | source | trixie | (unfixed) | unimportant | Not reported | Not reported |
| Debian | libtpms | source | bookworm | (unfixed) | unimportant | Not reported | Not reported |
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
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-6727]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-6727]
- [https://security-tracker.debian.org/tracker/CVE-2026-6727]
- [https://trustedcomputinggroup.org/about/security/]
- [https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf]
- [https://trustedcomputinggroup.org/wp-content/uploads/VRT0011-Advisory_Final-1.pdf]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2756.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]