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d="scan'208";a="526547482" Received: from rcdn-l-core-06.cisco.com ([173.37.255.143]) by rcdn-iport-7.cisco.com with ESMTP/TLS/TLS_AES_256_GCM_SHA384; 24 Sep 2026 12:16:00 +0000 Received: from sjc-ads-4926.cisco.com (sjc-ads-4926.cisco.com [10.28.39.190]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "ciscoit-managed-infra-smtp-auth.cisco.com", Issuer "Internal Private TLS SubCA" (verified OK)) by rcdn-l-core-06.cisco.com (Postfix) with ESMTPS id 33382180000B5 for ; Thu, 24 Sep 2026 12:16:00 +0000 (GMT) Received: by sjc-ads-4926.cisco.com (Postfix, from userid 1889728) id CDD54CC124A; Thu, 24 Sep 2026 05:15:59 -0700 (PDT) From: Yogita Urade To: openembedded-core@lists.openembedded.org Subject: [OE-core[scarthgap][v2][PATCH 1/2] python3-pyasn1: fix CVE-2026-30922 Date: Thu, 24 Sep 2026 05:15:57 -0700 Message-ID: <20260924121559.3071108-1-yurade@cisco.com> X-Mailer: git-send-email 2.44.4 MIME-Version: 1.0 X-Outbound-Client-TLS: VERIFIED;sjc-ads-4926.cisco.com [10.28.39.190];TLSv1.3;TLS_AES_256_GCM_SHA384;256;ciscoit-managed-infra-smtp-auth.cisco.com X-Outbound-SMTP-Client: 10.28.39.190, sjc-ads-4926.cisco.com X-Outbound-Node: rcdn-l-core-06.cisco.com List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Thu, 24 Sep 2026 12:16:44 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/246584 This patch applies upstream fix for CVE-2026-30922 as referenced in [2], using the upstream commit identified in [1]. [1] https://github.com/pyasn1/pyasn1/commit/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0 [2] https://nvd.nist.gov/vuln/detail/CVE-2026-30922 Signed-off-by: Yogita Urade --- .../recipes-devtools/python/python-pyasn1.inc | 1 + .../python3-pyasn1/CVE-2026-30922.patch | 262 ++++++++++++++++++ 2 files changed, 263 insertions(+) create mode 100644 meta/recipes-devtools/python/python3-pyasn1/CVE-2026-30922.patch diff --git a/meta/recipes-devtools/python/python-pyasn1.inc b/meta/recipes-devtools/python/python-pyasn1.inc index ae96f09fb1..0fe5e70adf 100644 --- a/meta/recipes-devtools/python/python-pyasn1.inc +++ b/meta/recipes-devtools/python/python-pyasn1.inc @@ -21,6 +21,7 @@ SRC_URI += " \ file://CVE-2026-23490.patch \ file://CVE-2026-59886.patch \ file://CVE-2026-59884.patch \ + file://CVE-2026-30922.patch \ " RDEPENDS:${PN}-ptest += " \ diff --git a/meta/recipes-devtools/python/python3-pyasn1/CVE-2026-30922.patch b/meta/recipes-devtools/python/python3-pyasn1/CVE-2026-30922.patch new file mode 100644 index 0000000000..c7b6fe4bff --- /dev/null +++ b/meta/recipes-devtools/python/python3-pyasn1/CVE-2026-30922.patch @@ -0,0 +1,262 @@ +From bcab1fc8f72230ad7ee6d9612a5216cc556e2d0a Mon Sep 17 00:00:00 2001 +From: Simon Pichugin +Date: Mon, 16 Mar 2026 17:23:11 -0700 +Subject: [PATCH] Merge commit from fork + +CVE: CVE-2026-30922 +Upstream-Status: Backport [https://github.com/pyasn1/pyasn1/commit/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0] + +(cherry picked from commit 25ad481c19fdb006e20485ef3fc2e5b3eff30ef0) +Signed-off-by: Yogita Urade +--- + pyasn1/codec/ber/decoder.py | 10 +++ + tests/codec/ber/test_decoder.py | 116 ++++++++++++++++++++++++++++++++ + tests/codec/cer/test_decoder.py | 24 +++++++ + tests/codec/der/test_decoder.py | 42 ++++++++++++ + 4 files changed, 192 insertions(+) + +diff --git a/pyasn1/codec/ber/decoder.py b/pyasn1/codec/ber/decoder.py +index 18865c2..4d34080 100644 +--- a/pyasn1/codec/ber/decoder.py ++++ b/pyasn1/codec/ber/decoder.py +@@ -38,6 +38,7 @@ SubstrateUnderrunError = error.SubstrateUnderrunError + # Maximum number of continuation octets (high-bit set) allowed per OID arc. + # 20 octets allows up to 140-bit integers, supporting UUID-based OIDs + MAX_OID_ARC_CONTINUATION_OCTETS = 20 ++MAX_NESTING_DEPTH = 100 + + # Maximum number of octets in a long-form tag ID (20 octets = up to + # 140-bit tag IDs, matching the OID arc limit) +@@ -1519,6 +1520,15 @@ class SingleItemDecoder(object): + decodeFun=None, substrateFun=None, + **options): + ++ _nestingLevel = options.get('_nestingLevel', 0) ++ ++ if _nestingLevel > MAX_NESTING_DEPTH: ++ raise error.PyAsn1Error( ++ 'ASN.1 structure nesting depth exceeds limit (%d)' % MAX_NESTING_DEPTH ++ ) ++ ++ options['_nestingLevel'] = _nestingLevel + 1 ++ + allowEoo = options.pop('allowEoo', False) + + if LOG: +diff --git a/tests/codec/ber/test_decoder.py b/tests/codec/ber/test_decoder.py +index 0152027..672c9af 100644 +--- a/tests/codec/ber/test_decoder.py ++++ b/tests/codec/ber/test_decoder.py +@@ -2048,6 +2048,122 @@ class CompressedFilesTestCase(BaseTestCase): + os.remove(path) + + ++class NestingDepthLimitTestCase(BaseTestCase): ++ """Test protection against deeply nested ASN.1 structures (CVE prevention).""" ++ ++ def testIndefLenSequenceNesting(self): ++ """Deeply nested indefinite-length SEQUENCEs must raise PyAsn1Error.""" ++ # Each \x30\x80 opens a new indefinite-length SEQUENCE ++ payload = b'\x30\x80' * 200 ++ try: ++ decoder.decode(payload) ++ except error.PyAsn1Error: ++ pass ++ else: ++ assert False, 'Deeply nested indef-length SEQUENCEs not rejected' ++ ++ def testIndefLenSetNesting(self): ++ """Deeply nested indefinite-length SETs must raise PyAsn1Error.""" ++ # Each \x31\x80 opens a new indefinite-length SET ++ payload = b'\x31\x80' * 200 ++ try: ++ decoder.decode(payload) ++ except error.PyAsn1Error: ++ pass ++ else: ++ assert False, 'Deeply nested indef-length SETs not rejected' ++ ++ def testDefiniteLenNesting(self): ++ """Deeply nested definite-length SEQUENCEs must raise PyAsn1Error.""" ++ inner = b'\x05\x00' # NULL ++ for _ in range(200): ++ length = len(inner) ++ if length < 128: ++ inner = b'\x30' + bytes([length]) + inner ++ else: ++ length_bytes = length.to_bytes( ++ (length.bit_length() + 7) // 8, 'big') ++ inner = b'\x30' + bytes([0x80 | len(length_bytes)]) + \ ++ length_bytes + inner ++ try: ++ decoder.decode(inner) ++ except error.PyAsn1Error: ++ pass ++ else: ++ assert False, 'Deeply nested definite-length SEQUENCEs not rejected' ++ ++ def testNestingUnderLimitWorks(self): ++ """Nesting within the limit must decode successfully.""" ++ inner = b'\x05\x00' # NULL ++ for _ in range(50): ++ length = len(inner) ++ if length < 128: ++ inner = b'\x30' + bytes([length]) + inner ++ else: ++ length_bytes = length.to_bytes( ++ (length.bit_length() + 7) // 8, 'big') ++ inner = b'\x30' + bytes([0x80 | len(length_bytes)]) + \ ++ length_bytes + inner ++ asn1Object, _ = decoder.decode(inner) ++ assert asn1Object is not None, 'Valid nested structure rejected' ++ ++ def testSiblingsDontIncreaseDepth(self): ++ """Sibling elements at the same level must not inflate depth count.""" ++ # SEQUENCE containing 200 INTEGER siblings - should decode fine ++ components = b'\x02\x01\x01' * 200 # 200 x INTEGER(1) ++ length = len(components) ++ length_bytes = length.to_bytes( ++ (length.bit_length() + 7) // 8, 'big') ++ payload = b'\x30' + bytes([0x80 | len(length_bytes)]) + \ ++ length_bytes + components ++ asn1Object, _ = decoder.decode(payload) ++ assert asn1Object is not None, 'Siblings incorrectly rejected' ++ ++ def testErrorMessageContainsLimit(self): ++ """Error message must indicate the nesting depth limit.""" ++ payload = b'\x30\x80' * 200 ++ try: ++ decoder.decode(payload) ++ except error.PyAsn1Error as exc: ++ assert 'nesting depth' in str(exc).lower(), \ ++ 'Error message missing depth info: %s' % exc ++ else: ++ assert False, 'Expected PyAsn1Error' ++ ++ def testNoRecursionError(self): ++ """Must raise PyAsn1Error, not RecursionError.""" ++ payload = b'\x30\x80' * 50000 ++ try: ++ decoder.decode(payload) ++ except error.PyAsn1Error: ++ pass ++ except RecursionError: ++ assert False, 'Got RecursionError instead of PyAsn1Error' ++ ++ def testMixedNesting(self): ++ """Mixed SEQUENCE and SET nesting must be caught.""" ++ # Alternate SEQUENCE (0x30) and SET (0x31) with indef length ++ payload = b'' ++ for i in range(200): ++ payload += b'\x30\x80' if i % 2 == 0 else b'\x31\x80' ++ try: ++ decoder.decode(payload) ++ except error.PyAsn1Error: ++ pass ++ else: ++ assert False, 'Mixed nesting not rejected' ++ ++ def testWithSchema(self): ++ """Deeply nested structures must be caught even with schema.""" ++ payload = b'\x30\x80' * 200 ++ try: ++ decoder.decode(payload, asn1Spec=univ.Sequence()) ++ except error.PyAsn1Error: ++ pass ++ else: ++ assert False, 'Deeply nested with schema not rejected' ++ ++ + class NonStreamingCompatibilityTestCase(BaseTestCase): + def setUp(self): + from pyasn1 import debug +diff --git a/tests/codec/cer/test_decoder.py b/tests/codec/cer/test_decoder.py +index d759f76..2994846 100644 +--- a/tests/codec/cer/test_decoder.py ++++ b/tests/codec/cer/test_decoder.py +@@ -389,6 +389,30 @@ class SequenceDecoderWithExplicitlyTaggedSetOfOpenTypesTestCase(BaseTestCase): + assert s[1][0] == univ.OctetString(hexValue='02010C') + + ++class NestingDepthLimitTestCase(BaseTestCase): ++ """Test CER decoder protection against deeply nested structures.""" ++ ++ def testIndefLenNesting(self): ++ """Deeply nested indefinite-length SEQUENCEs must raise PyAsn1Error.""" ++ payload = b'\x30\x80' * 200 ++ try: ++ decoder.decode(payload) ++ except PyAsn1Error: ++ pass ++ else: ++ assert False, 'Deeply nested indef-length SEQUENCEs not rejected' ++ ++ def testNoRecursionError(self): ++ """Must raise PyAsn1Error, not RecursionError.""" ++ payload = b'\x30\x80' * 50000 ++ try: ++ decoder.decode(payload) ++ except PyAsn1Error: ++ pass ++ except RecursionError: ++ assert False, 'Got RecursionError instead of PyAsn1Error' ++ ++ + suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__]) + + if __name__ == '__main__': +diff --git a/tests/codec/der/test_decoder.py b/tests/codec/der/test_decoder.py +index 726c999..3a81a6e 100644 +--- a/tests/codec/der/test_decoder.py ++++ b/tests/codec/der/test_decoder.py +@@ -396,6 +396,48 @@ class SequenceDecoderWithExplicitlyTaggedSetOfOpenTypesTestCase(BaseTestCase): + assert s[1][0] == univ.OctetString(hexValue='02010C') + + ++class NestingDepthLimitTestCase(BaseTestCase): ++ """Test DER decoder protection against deeply nested structures.""" ++ ++ def testDefiniteLenNesting(self): ++ """Deeply nested definite-length SEQUENCEs must raise PyAsn1Error.""" ++ inner = b'\x05\x00' # NULL ++ for _ in range(200): ++ length = len(inner) ++ if length < 128: ++ inner = b'\x30' + bytes([length]) + inner ++ else: ++ length_bytes = length.to_bytes( ++ (length.bit_length() + 7) // 8, 'big') ++ inner = b'\x30' + bytes([0x80 | len(length_bytes)]) + \ ++ length_bytes + inner ++ try: ++ decoder.decode(inner) ++ except PyAsn1Error: ++ pass ++ else: ++ assert False, 'Deeply nested definite-length SEQUENCEs not rejected' ++ ++ def testNoRecursionError(self): ++ """Must raise PyAsn1Error, not RecursionError.""" ++ inner = b'\x05\x00' ++ for _ in range(200): ++ length = len(inner) ++ if length < 128: ++ inner = b'\x30' + bytes([length]) + inner ++ else: ++ length_bytes = length.to_bytes( ++ (length.bit_length() + 7) // 8, 'big') ++ inner = b'\x30' + bytes([0x80 | len(length_bytes)]) + \ ++ length_bytes + inner ++ try: ++ decoder.decode(inner) ++ except PyAsn1Error: ++ pass ++ except RecursionError: ++ assert False, 'Got RecursionError instead of PyAsn1Error' ++ ++ + suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__]) + + if __name__ == '__main__': +-- +2.44.4