diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index a02fb24005b2..5d92d7160956 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -288,6 +288,8 @@ Custom asymmetric vectors
 * ``asymmetric/PKCS8/rsa-pbewithmd5anddescbc.pem`` - A PKCS8 encoded RSA key
   encrypted using the ``pbeWithMD5AndDES-CBC`` algorithm with the password
   ``hunter2``.
+* ``asymmetric/PKCS8/rsa-pbes1-3des-long-salt.pem`` - A PKCS8 encoded RSA key
+  encrypted with a 20 byte salt with the password ``password``.
 
 Key exchange
 ~~~~~~~~~~~~
diff --git a/src/rust/cryptography-key-parsing/src/pkcs8.rs b/src/rust/cryptography-key-parsing/src/pkcs8.rs
index 5d0dafd5c7e7..05809af99a26 100644
--- a/src/rust/cryptography-key-parsing/src/pkcs8.rs
+++ b/src/rust/cryptography-key-parsing/src/pkcs8.rs
@@ -127,14 +127,14 @@ fn pbes1_decrypt(
     password: &[u8],
     cipher: openssl::symm::Cipher,
     hash: openssl::hash::MessageDigest,
-    params: &PBES1Params,
+    params: &PBES1Params<'_>,
 ) -> KeyParsingResult<Vec<u8>> {
     let Ok(password) = std::str::from_utf8(password) else {
         return Err(KeyParsingError::IncorrectPassword);
     };
     let key = cryptography_crypto::pkcs12::kdf(
         password,
-        &params.salt,
+        params.salt,
         cryptography_crypto::pkcs12::KDF_ENCRYPTION_KEY_ID,
         params.iterations,
         cipher.key_len(),
@@ -142,7 +142,7 @@ fn pbes1_decrypt(
     )?;
     let iv = cryptography_crypto::pkcs12::kdf(
         password,
-        &params.salt,
+        params.salt,
         cryptography_crypto::pkcs12::KDF_IV_ID,
         params.iterations,
         cipher.block_size(),
diff --git a/src/rust/cryptography-x509/src/common.rs b/src/rust/cryptography-x509/src/common.rs
index 0479653d95d4..414f97083ac9 100644
--- a/src/rust/cryptography-x509/src/common.rs
+++ b/src/rust/cryptography-x509/src/common.rs
@@ -166,9 +166,9 @@ pub enum AlgorithmParameters<'a> {
     Rc2Cbc(Rc2CbcParams),
 
     #[defined_by(oid::PBES1_WITH_SHA_AND_3KEY_TRIPLEDES_CBC)]
-    Pbes1WithShaAnd3KeyTripleDesCbc(PBES1Params),
+    Pbes1WithShaAnd3KeyTripleDesCbc(PBES1Params<'a>),
     #[defined_by(oid::PBES1_WITH_SHA_AND_40_BIT_RC2_CBC)]
-    Pbe1WithShaAnd40BitRc2Cbc(PBES1Params),
+    Pbe1WithShaAnd40BitRc2Cbc(PBES1Params<'a>),
 
     #[default]
     Other(asn1::ObjectIdentifier, Option<asn1::Tlv<'a>>),
@@ -529,9 +529,16 @@ pub struct ScryptParams<'a> {
     pub key_length: Option<u32>,
 }
 
+// PBES1Params is defined as
+// PBEParameter ::= SEQUENCE {
+//    salt OCTET STRING (SIZE(8)),
+//    iterationCount INTEGER
+// }
+// in RFC 2898 and 8018 but in practice various implementations
+// use longer salts, so we need to handle variable salt length.
 #[derive(asn1::Asn1Read, asn1::Asn1Write, PartialEq, Eq, Hash, Clone, Debug)]
-pub struct PBES1Params {
-    pub salt: [u8; 8],
+pub struct PBES1Params<'a> {
+    pub salt: &'a [u8],
     pub iterations: u64,
 }
 
diff --git a/tests/hazmat/primitives/test_serialization.py b/tests/hazmat/primitives/test_serialization.py
index 70062f156f17..33046543e1e5 100644
--- a/tests/hazmat/primitives/test_serialization.py
+++ b/tests/hazmat/primitives/test_serialization.py
@@ -463,6 +463,22 @@ def test_load_pkcs8_private_key_unknown_kdf(self):
         with pytest.raises(ValueError):
             load_pem_private_key(data, password=b"password")
 
+    @pytest.mark.skip_fips(reason="3DES unsupported in FIPS")
+    def test_load_pkcs8_pbes1_long_salt(self):
+        data = load_vectors_from_file(
+            os.path.join(
+                "asymmetric", "PKCS8", "rsa-pbes1-3des-long-salt.pem"
+            ),
+            lambda f: f.read(),
+            mode="rb",
+        )
+        key = load_pem_private_key(
+            data, password=b"password", unsafe_skip_rsa_key_validation=True
+        )
+        assert isinstance(key, rsa.RSAPrivateKey)
+        assert key.key_size == 4096
+        assert key.private_numbers().public_numbers.e == 65537
+
     @pytest.mark.parametrize(
         "filename",
         [
diff --git a/vectors/cryptography_vectors/asymmetric/PKCS8/rsa-pbes1-3des-long-salt.pem b/vectors/cryptography_vectors/asymmetric/PKCS8/rsa-pbes1-3des-long-salt.pem
new file mode 100644
index 000000000000..0ea24f106673
--- /dev/null
+++ b/vectors/cryptography_vectors/asymmetric/PKCS8/rsa-pbes1-3des-long-salt.pem
@@ -0,0 +1,53 @@
+-----BEGIN ENCRYPTED PRIVATE KEY-----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+-----END ENCRYPTED PRIVATE KEY-----