CVE-2026-42012

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.(CVE-2026-3832)

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.(CVE-2026-42012)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.(CVE-2026-3832)

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.(CVE-2026-42012)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.(CVE-2026-3832)

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.(CVE-2026-42012)

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.(CVE-2026-3832)

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.(CVE-2026-42012)

Please update the gnutls packages to provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: Add more checks to DTLS reassembly (CVE-2026-33846)
• gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
• gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845)
• gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
• gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833)
• gnutls: Fix intersecting empty constraints (CVE-2026-42011)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
• gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845)
• gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
• gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833)
• gnutls: Fix intersecting empty name constraints (CVE-2026-42011)
• gnutls: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
• gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845)
• gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
• gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833)
• gnutls: Fix intersecting empty name constraints (CVE-2026-42011)
• gnutls: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.

Please update the gnutls packages to provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

• gnutls: Add more checks to DTLS reassembly (CVE-2026-33846)
• gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
• gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845)
• gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
• gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833)
• gnutls: Fix intersecting empty constraints (CVE-2026-42011)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library,
which implements cryptographic algorithms and protocols such as SSL, TLS, and
DTLS.

Security Fix(es):

• gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
• gnutls: Fix crashing on an underflow with a DTLS datagram

(CVE-2026-33845)

• gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
• gnutls: Fix case-sensitivity of domain name comparison in name

constraints (CVE-2026-3833)

• gnutls: Fix intersecting empty name constraints (CVE-2026-42011)
• gnutls: Denial of Service via heap buffer overflow in DTLS handshake

fragment reassembly (CVE-2026-33846)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s)
listed in the References section.

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library,
which implements cryptographic algorithms and protocols such as SSL, TLS, and
DTLS.

Security Fix(es):

• gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
• gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845)
• gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
• gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833)
• gnutls: Fix intersecting empty name constraints (CVE-2026-42011)
• gnutls: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s)
listed in the References section.

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.

• CVE-2026-33846: DTLS handshake reassembly add more checks (buffers.c)
• CVE-2026-42009: DTLS reorder qsort with duplicate sequence numbers
• CVE-2026-42011: X.509 name constraints intersection of empty constraints
• CVE-2026-42012: URI/SRV SAN preclude CN fallback
• CVE-2026-42013: prevent fallback on oversized SAN
• CVE-2026-42014: PKCS#11 token set_pin UAF + leak
• CVE-2026-5260: PKCS#11 RSA short-ciphertext overread; ciphertext must match modulus size
• CVE-2026-42015: PKCS#12 bag-element off-by-one bound check

• CVE-2026-33846: DTLS handshake reassembly add more checks (buffers.c)
• CVE-2026-42009: DTLS reorder qsort with duplicate sequence numbers
• CVE-2026-42011: X.509 name constraints intersection of empty constraints
• CVE-2026-42012: URI/SRV SAN preclude CN fallback
• CVE-2026-42013: prevent fallback on oversized SAN
• CVE-2026-42014: PKCS#11 token set_pin UAF + leak
• CVE-2026-5260: PKCS#11 RSA short-ciphertext overread; ciphertext must match modulus size
• CVE-2026-42015: PKCS#12 bag-element off-by-one bound check

• CVE-2026-33846: fix heap buffer overflow in DTLS handshake fragment reassembly by validating message-length consistency and bounding the fragment write against the destination buffer capacity
• CVE-2026-42009: fix undefined behaviour in DTLS packet ordering by making the handshake_compare qsort comparator return 0 for equal sequence numbers
• CVE-2026-42011: fix name constraints bypass by no longer short-circuiting the intersection of an empty permitted set, so later permitted constraints are still enforced
• CVE-2026-42012: fix certificate verification bypass by making URI and SRV subjectAltName entries preclude the legacy CN fallback hostname check
• CVE-2026-42013: fix certificate verification bypass by preventing CN and DN-email fallback when a subjectAltName entry is oversized
• CVE-2026-5260: fix heap overread in RSA key exchange by rejecting a ciphertext whose size does not match the RSA modulus
• CVE-2026-42014: fix use-after-free and leak in gnutls_pkcs11_token_set_pin when changing the security officer PIN

• CVE-2026-33846: fix heap buffer overflow in DTLS handshake fragment reassembly by validating message-length consistency and bounding the fragment write against the destination buffer capacity
• CVE-2026-42009: fix undefined behaviour in DTLS packet ordering by making the handshake_compare qsort comparator return 0 for equal sequence numbers
• CVE-2026-42011: fix name constraints bypass by no longer short-circuiting the intersection of an empty permitted set, so later permitted constraints are still enforced
• CVE-2026-42012: fix certificate verification bypass by making URI and SRV subjectAltName entries preclude the legacy CN fallback hostname check
• CVE-2026-42013: fix certificate verification bypass by preventing CN and DN-email fallback when a subjectAltName entry is oversized
• CVE-2026-5260: fix heap overread in RSA key exchange by rejecting a ciphertext whose size does not match the RSA modulus
• CVE-2026-42014: fix use-after-free and leak in gnutls_pkcs11_token_set_pin when changing the security officer PIN
• CVE-2026-42015: fix off-by-one out-of-bounds write when appending an element to a PKCS#12 bag that already holds the maximum number of elements

• CVE-2026-42009: fix DTLS handshake_compare qsort comparator contract violation (undefined behaviour)
• CVE-2026-33846: add DTLS reassembly fragment length/bounds checks (heap overwrite)
• CVE-2026-42012: URI subjectAltName now precludes Common Name fallback in hostname verification
• CVE-2026-42013: oversized subjectAltName now precludes Common Name fallback in hostname verification
• CVE-2026-5260: guard PKCS#11 RSA decryption against short-ciphertext heap overread

• CVE-2026-42009: fix DTLS handshake_compare qsort comparator contract violation (undefined behaviour)
• CVE-2026-33846: add DTLS reassembly fragment length/bounds checks (heap overwrite)
• CVE-2026-42012: URI subjectAltName now precludes Common Name fallback in hostname verification
• CVE-2026-42013: oversized subjectAltName now precludes Common Name fallback in hostname verification
• CVE-2026-5260: guard PKCS#11 RSA decryption against short-ciphertext heap overread

• SECURITY UPDATE: name-constraints bypass with excluded-only parent CA
  • debian/patches/CVE-2026-42011.patch: take permitted name constraints into account when a prior CA in the chain carried only excluded constraints, so a constrained sub-CA can no longer issue certificates outside its permitted scope, in lib/x509/name_constraints.c.
  • CVE-2026-42011
• SECURITY UPDATE: CN fallback not precluded by URI SAN
  • debian/patches/CVE-2026-42012.patch: treat a URI subject alternative name as precluding the fallback to Common Name hostname matching, per RFC 6125 6.4.4, in lib/x509/hostname-verify.c.
  • CVE-2026-42012
• SECURITY UPDATE: CN/DN fallback not precluded by oversized SAN
  • debian/patches/CVE-2026-42013.patch: keep the CN (hostname) and DN-email fallbacks disabled when a subject alternative name is oversized instead of silently ignoring it, per RFC 6125 6.4.4, in lib/x509/hostname-verify.c and lib/x509/email-verify.c.
  • CVE-2026-42013
• SECURITY UPDATE: PKCS#12 bag out-of-bounds write
  • debian/patches/CVE-2026-42015.patch: fix an off-by-one in the PKCS#12 bag element bounds check that allowed writing past the 32-element array, in lib/x509/pkcs12_bag.c.
  • CVE-2026-42015

• SECURITY UPDATE: CN fallback not precluded by URI SAN
  • debian/patches/CVE-2026-42012.patch: treat a URI subject alternative name as precluding the fallback to Common Name hostname matching, per RFC 6125 6.4.4, in lib/x509/hostname-verify.c.
  • CVE-2026-42012
• SECURITY UPDATE: CN/DN fallback not precluded by oversized SAN
  • debian/patches/CVE-2026-42013.patch: keep the CN (hostname) and DN-email fallbacks disabled when a subject alternative name is oversized instead of silently ignoring it, per RFC 6125 6.4.4, in lib/x509/hostname-verify.c and lib/x509/email-verify.c.
  • CVE-2026-42013
• SECURITY UPDATE: PKCS#12 bag out-of-bounds write
  • debian/patches/CVE-2026-42015.patch: fix an off-by-one in the PKCS#12 bag element bounds check that allowed writing past the 32-element array, in lib/x509/pkcs12_bag.c.
  • CVE-2026-42015

• SECURITY UPDATE: Name constraints bypass when prior CAs have only excluded constraints
  • debian/patches/CVE-2026-42011.patch: remove the empty-permitted early return in name_constraints_node_list_intersect in lib/x509/name_constraints.c so permitted name constraints of a subsequent CA still propagate when previous CAs only carried excluded constraints; also backport the upstream regression suites to tests/name-constraints-merge.c
  • CVE-2026-42011
• SECURITY UPDATE: Certificate validation bypass via oversized subject alternative name
  • debian/patches/CVE-2026-42013.patch: refactor the CN and DN-email fallback logic and disable the fallback when gnutls_x509_crt_get_subject_alt_name reports an oversized SAN (GNUTLS_E_SHORT_MEMORY_BUFFER) in gnutls_x509_crt_check_hostname2 and gnutls_x509_crt_check_email (lib/x509/hostname-verify.c, lib/x509/email-verify.c); also backport the upstream regression tests to tests/hostname-check.c and tests/cert-tests/email (with tests/cert-tests/email-certs/oversized-san.pem)
  • CVE-2026-42013
• SECURITY UPDATE: CN fallback not precluded by URI or SRV subject alternative names
  • debian/patches/CVE-2026-42012.patch: add GNUTLS_SAN_URI and GNUTLS_SAN_OTHERNAME_SRV to the PRECLUDES_CN_FALLBACK macro in lib/x509/hostname-verify.c so certificates presenting URI or SRV SANs no longer allow hostname matching against the common name per RFC 6125 6.4.4; backport SRV virtual-SAN awareness (lib/includes/gnutls/gnutls.h.in, lib/x509/common.h, lib/x509/virt-san.c, lib/x509/output.c, lib/x509/x509.c) and the get_alt_name othername virtualization fix so SRV othernames are recognized on 3.6.13; also backport the upstream regression tests to tests/hostname-check.c
  • CVE-2026-42012

• CVE-2026-42009: fix DTLS handshake_compare qsort comparator contract violation (undefined behaviour)
• CVE-2026-33846: add DTLS reassembly fragment length/bounds checks (heap overwrite)
• CVE-2026-42012: URI subjectAltName now precludes Common Name fallback in hostname verification
• CVE-2026-42013: oversized subjectAltName now precludes Common Name fallback in hostname verification
• CVE-2026-5260: guard PKCS#11 RSA decryption against short-ciphertext heap overread

• CVE-2026-42012: URI subjectAltName now precludes Common Name fallback in hostname verification

• Rebased onto the vendor 3.3.29-9.0.3.el7_9 sources
• CVE-2026-5260: guard PKCS#11 RSA decryption against short-ciphertext heap overread (TuxCare fix retained)
• CVE-2026-42014 and CVE-2026-42015 are fixed by the vendor in this build
• CVE-2026-42011 is not applicable to this baseline per the vendor assessment
• CVE-2026-33845, CVE-2026-33846, CVE-2026-3833, CVE-2026-42009, CVE-2026-42012 and CVE-2026-42013 are now fixed by the vendor; the TuxCare duplicates are dropped
• CVE-2026-3833 follow-up: the vendor's email_matches() no longer matches a bare-domain rfc822Name against a bare-domain constraint of the same length, which 3.3.29 did; restore that comparison, case-insensitively, and add the assertions to tests/name-constraints.c

• Rebased onto the vendor 3.3.29-9.0.3.el7_9 sources
• CVE-2026-5260: guard PKCS#11 RSA decryption against short-ciphertext heap overread (TuxCare fix retained)
• CVE-2026-42014 and CVE-2026-42015 are fixed by the vendor in this build
• CVE-2026-42011 is not applicable to this baseline per the vendor assessment
• CVE-2026-33845, CVE-2026-33846, CVE-2026-3833, CVE-2026-42009, CVE-2026-42012 and CVE-2026-42013 are now fixed by the vendor; the TuxCare duplicates are dropped
• CVE-2026-3833 follow-up: the vendor's email_matches() no longer matches a bare-domain rfc822Name against a bare-domain constraint of the same length, which 3.3.29 did; restore that comparison, case-insensitively, and add the assertions to tests/name-constraints.c

• Rebased onto the vendor 3.3.29-9.0.3.el7_9 sources
• CVE-2026-5260: guard PKCS#11 RSA decryption against short-ciphertext heap overread (TuxCare fix retained)
• CVE-2026-42014 and CVE-2026-42015 are fixed by the vendor in this build
• CVE-2026-42011 is not applicable to this baseline per the vendor assessment
• CVE-2026-33845, CVE-2026-33846, CVE-2026-3833, CVE-2026-42009, CVE-2026-42012 and CVE-2026-42013 are now fixed by the vendor; the TuxCare duplicates are dropped
• CVE-2026-3833 follow-up: the vendor's email_matches() no longer matches a bare-domain rfc822Name against a bare-domain constraint of the same length, which 3.3.29 did; restore that comparison, case-insensitively, and add the assertions to tests/name-constraints.c

These are all security issues fixed in the gnutls-3.8.13-1.1 package on the GA media of openSUSE Tumbleweed.

This update for gnutls fixes the following issues

• CVE-2026-3832: cert-session: fix multi-entry OCSP revocation bypass (bsc#1263706).
• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).

This update for gnutls fixes the following issues

• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).

This update for gnutls fixes the following issues

• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).

This update for gnutls fixes the following issues

• CVE-2026-3832: cert-session: fix multi-entry OCSP revocation bypass (bsc#1263706).
• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).

This update for gnutls fixes the following issues

• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).

This update for gnutls fixes the following issues

• CVE-2026-3832: cert-session: fix multi-entry OCSP revocation bypass (bsc#1263706).
• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).

This update for gnutls fixes the following issues

• CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
• CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
• CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
• CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
• CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
• CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
• CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
• CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
• CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
• CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
• CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
• CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).