| Name | CVE-2026-5419 |
| Description | A flaw was found in gnutls. The PKCS#7 padding check, performed during decryption, was not constant-time. This timing side-channel could allow a remote attacker to potentially leak sensitive information about the padding bytes through observable timing differences. This vulnerability is a form of information disclosure. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6281-1 |
| Debian Bugs | 1135319 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| gnutls28 (PTS) | bullseye | 3.7.1-5+deb11u5 | fixed |
| bullseye (security) | 3.7.1-5+deb11u10 | fixed | |
| bookworm | 3.7.9-2+deb12u6 | vulnerable | |
| bookworm (security) | 3.7.9-2+deb12u7 | fixed | |
| trixie | 3.8.9-3+deb13u3 | vulnerable | |
| trixie (security) | 3.8.9-3+deb13u4 | fixed | |
| forky, sid | 3.8.13-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| gnutls28 | source | bullseye | (not affected) | |||
| gnutls28 | source | bookworm | 3.7.9-2+deb12u7 | DSA-6281-1 | ||
| gnutls28 | source | trixie | 3.8.9-3+deb13u4 | DSA-6281-1 | ||
| gnutls28 | source | (unstable) | 3.8.13-1 | 1135319 |
[bullseye] - gnutls28 <not-affected> (Vulnerable code introduced later)
https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-13
https://gitlab.com/gnutls/gnutls/-/issues/1815
Fixed by: https://gitlab.com/gnutls/gnutls/-/commit/1e627aa5ad95c6dc0518d94e9a009997b081a1ab (3.8.13)
Introduced with: https://gitlab.com/gnutls/gnutls/-/commit/4b45ad6923a7b1d296a111153663f23c13173b94 (3.7.7)