CLSA-2026-1778787445
See a problem?- Import Source
- https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1778787445.json
- JSON Data
- https://api.osv.dev/v1/vulns/CLSA-2026-1778787445
- Upstream
- Published
- 2026-05-14T22:19:12Z
- Modified
- 2026-06-04T09:47:36Z
- Summary
- Fix CVE(s): CVE-2026-28387, CVE-2026-28388, CVE-2026-28389
- Details
-
- SECURITY UPDATE: Use-after-free / heap corruption in dane_match() of
the X.509 verifier where the cached DANE-matched certificate was freed
via OPENSSL_free() instead of X509_free(), bypassing the X509 reference
counting and freeing certificate fields that may still be referenced by
other holders. An attacker able to influence the DANE TLSA records used
during certificate verification can trigger memory corruption.
- debian/patches/CVE-2026-28387.patch: replace OPENSSL_free(dane->mcert) with X509_free(dane->mcert) in dane_match() in crypto/x509/x509_vfy.c.
- CVE-2026-28387
- SECURITY UPDATE: NULL pointer dereference in check_delta_base() of
the X.509 CRL verifier when a delta CRL lacks the CRL Number extension.
A remote attacker controlling a delta CRL can trigger a crash, leading
to denial of service in applications using -crl_check with -use_deltas.
- debian/patches/CVE-2026-28388.patch: NULL-check delta->crl_number before passing it to ASN1_INTEGER_cmp() in check_delta_base() in crypto/x509/x509_vfy.c, and ship the upstream test fixtures and verify recipe.
- CVE-2026-28388
- SECURITY UPDATE: NULL pointer dereference in dh_cms_set_shared_info()
and ecdh_cms_set_shared_info() when a CMS KeyAgreeRecipientInfo has
no KeyEncryptionAlgorithmIdentifier parameters field, allowing a
remote attacker to trigger a denial of service via crafted CMS data.
- debian/patches/CVE-2026-28389.patch: NULL-check alg->parameter before accessing its type in crypto/dh/dh_ameth.c and crypto/ec/ec_ameth.c.
- CVE-2026-28389
- SECURITY UPDATE: Use-after-free / heap corruption in dane_match() of
the X.509 verifier where the cached DANE-matched certificate was freed
via OPENSSL_free() instead of X509_free(), bypassing the X509 reference
counting and freeing certificate fields that may still be referenced by
other holders. An attacker able to influence the DANE TLSA records used
during certificate verification can trigger memory corruption.
- References
Affected packages
TuxCare:Ubuntu:18.04 / libssl-dev
Package
- Name
- libssl-dev
- Purl
- pkg:deb/tuxcare/libssl-dev?distro=ubuntu-18.04
TuxCare:Ubuntu:18.04 / libssl-doc
Package
- Name
- libssl-doc
- Purl
- pkg:deb/tuxcare/libssl-doc?distro=ubuntu-18.04
TuxCare:Ubuntu:18.04 / libssl1.1
Package
- Name
- libssl1.1
- Purl
- pkg:deb/tuxcare/libssl1.1?distro=ubuntu-18.04