CVE-2026-22796

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Source
https://cve.org/CVERecord?id=CVE-2026-22796
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22796.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-22796
Downstream
Related
Published
2026-01-27T16:16:35.543Z
Modified
2026-01-29T06:52:01.957424Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS#7 data where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing malformed PKCS#7 data.

Impact summary: An application performing signature verification of PKCS#7 data or calling directly the PKCS7digestfrom_attributes() function can be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service.

The function PKCS7digestfromattributes() accesses the message digest attribute value without validating its type. When the type is not VASN1OCTETSTRING, this results in accessing invalid memory through the ASN1_TYPE union, causing a crash.

Exploiting this vulnerability requires an attacker to provide a malformed signed PKCS#7 to an application that verifies it. The impact of the exploit is just a Denial of Service, the PKCS7 API is legacy and applications should be using the CMS API instead. For these reasons the issue was assessed as Low severity.

The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS#7 parsing implementation is outside the OpenSSL FIPS module boundary.

OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.

References

Affected packages

Git / github.com/openssl/openssl

Affected ranges

Type
GIT
Repo
https://github.com/openssl/openssl
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2502e7b7d4c0cf4f972a881641fe09edc67aeec4
Fixed
572844beca95068394c916626a6d3a490f831a49
Fixed
7bbca05be55b129651d9df4bdb92becc45002c12
Fixed
eeee3cbd4d682095ed431052f00403004596373e
Fixed
ef2fb66ec571564d64d1c74a12e388a2a54d05d2

Affected versions

3.*

3.0-POST-CLANG-FORMAT-WEBKIT
3.0-PRE-CLANG-FORMAT-WEBKIT
3.3-POST-CLANG-FORMAT-WEBKIT
3.3-PRE-CLANG-FORMAT-WEBKIT
3.4-POST-CLANG-FORMAT-WEBKIT
3.4-PRE-CLANG-FORMAT-WEBKIT
3.5-POST-CLANG-FORMAT-WEBKIT
3.5-PRE-CLANG-FORMAT-WEBKIT
3.6-POST-CLANG-FORMAT-WEBKIT
3.6-PRE-CLANG-FORMAT-WEBKIT

Other

BEFORE_engine
OpenSSL_0_9_1c
OpenSSL_0_9_2b
OpenSSL_0_9_3
OpenSSL_0_9_3a
OpenSSL_0_9_3beta2
OpenSSL_0_9_4
OpenSSL_0_9_5a
OpenSSL_0_9_5a-beta1
OpenSSL_0_9_5a-beta2
OpenSSL_0_9_5beta1
OpenSSL_0_9_5beta2
OpenSSL_0_9_6-beta3
OpenSSL_1_1_0-pre1
OpenSSL_1_1_0-pre2
OpenSSL_1_1_0-pre3
OpenSSL_1_1_0-pre4
OpenSSL_1_1_0-pre5
OpenSSL_1_1_0-pre6
OpenSSL_1_1_1
OpenSSL_1_1_1-pre1
OpenSSL_1_1_1-pre2
OpenSSL_1_1_1-pre3
OpenSSL_1_1_1-pre4
OpenSSL_1_1_1-pre5
OpenSSL_1_1_1-pre6
OpenSSL_1_1_1-pre7
OpenSSL_1_1_1-pre8
OpenSSL_1_1_1-pre9
master-post-auto-reformat
master-post-reformat
master-pre-auto-reformat
master-pre-reformat

openssl-3.*

openssl-3.0.0
openssl-3.0.0-alpha1
openssl-3.0.0-alpha10
openssl-3.0.0-alpha11
openssl-3.0.0-alpha12
openssl-3.0.0-alpha13
openssl-3.0.0-alpha14
openssl-3.0.0-alpha15
openssl-3.0.0-alpha16
openssl-3.0.0-alpha17
openssl-3.0.0-alpha2
openssl-3.0.0-alpha3
openssl-3.0.0-alpha4
openssl-3.0.0-alpha5
openssl-3.0.0-alpha6
openssl-3.0.0-alpha7
openssl-3.0.0-alpha8
openssl-3.0.0-alpha9
openssl-3.0.0-beta1
openssl-3.0.0-beta2
openssl-3.0.1
openssl-3.0.10
openssl-3.0.11
openssl-3.0.12
openssl-3.0.13
openssl-3.0.14
openssl-3.0.15
openssl-3.0.16
openssl-3.0.17
openssl-3.0.18
openssl-3.0.2
openssl-3.0.3
openssl-3.0.4
openssl-3.0.5
openssl-3.0.6
openssl-3.0.7
openssl-3.0.8
openssl-3.0.9
openssl-3.2.0-alpha1
openssl-3.2.0-alpha2
openssl-3.3.0
openssl-3.3.0-alpha1
openssl-3.3.0-beta1
openssl-3.3.1
openssl-3.3.2
openssl-3.3.3
openssl-3.3.4
openssl-3.3.5
openssl-3.4.0
openssl-3.4.0-alpha1
openssl-3.4.0-beta1
openssl-3.4.1
openssl-3.4.2
openssl-3.4.3
openssl-3.5.0
openssl-3.5.0-alpha1
openssl-3.5.0-beta1
openssl-3.5.1
openssl-3.5.2
openssl-3.5.3
openssl-3.5.4
openssl-3.6.0
openssl-3.6.0-alpha1
openssl-3.6.0-beta1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22796.json"

vanir_signatures

[
    {
        "source": "https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12",
        "digest": {
            "line_hashes": [
                "71476756686855470599937379985047700091",
                "166895001063044813957862891151407698928",
                "278712318572386455087903167506773264569",
                "62751701112678304274354497278072631412",
                "305528711857785099232457614306160091925"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "apps/s_client.c"
        },
        "id": "CVE-2026-22796-09b46f75"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2",
        "digest": {
            "length": 48739.0,
            "function_hash": "199855863195958881625652055964543723547"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "apps/s_client.c",
            "function": "s_client_main"
        },
        "id": "CVE-2026-22796-0b6c52aa"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49",
        "digest": {
            "length": 46133.0,
            "function_hash": "89525939813841793658939652477796738403"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "apps/s_client.c",
            "function": "s_client_main"
        },
        "id": "CVE-2026-22796-135694a1"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49",
        "digest": {
            "line_hashes": [
                "60877912797987591188065755797983277280",
                "251788162060282103686621368991676932733",
                "40400787577453108895692359634937979252",
                "331144855365863902029291104116453962179",
                "88149325502830834177707272741538263698",
                "104081780024832426122495621692374432985",
                "320309570822310705485919480150939913446"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs12/p12_kiss.c"
        },
        "id": "CVE-2026-22796-1be6bf98"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12",
        "digest": {
            "line_hashes": [
                "60877912797987591188065755797983277280",
                "251788162060282103686621368991676932733",
                "40400787577453108895692359634937979252",
                "331144855365863902029291104116453962179",
                "88149325502830834177707272741538263698",
                "104081780024832426122495621692374432985",
                "320309570822310705485919480150939913446"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs12/p12_kiss.c"
        },
        "id": "CVE-2026-22796-23f9a2c6"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e",
        "digest": {
            "line_hashes": [
                "60877912797987591188065755797983277280",
                "251788162060282103686621368991676932733",
                "40400787577453108895692359634937979252",
                "331144855365863902029291104116453962179",
                "88149325502830834177707272741538263698",
                "104081780024832426122495621692374432985",
                "320309570822310705485919480150939913446"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs12/p12_kiss.c"
        },
        "id": "CVE-2026-22796-276a6f9a"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4",
        "digest": {
            "length": 48972.0,
            "function_hash": "137663506870388774154075225648218501066"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "apps/s_client.c",
            "function": "s_client_main"
        },
        "id": "CVE-2026-22796-30c3a1ca"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2",
        "digest": {
            "line_hashes": [
                "60877912797987591188065755797983277280",
                "251788162060282103686621368991676932733",
                "40400787577453108895692359634937979252",
                "331144855365863902029291104116453962179",
                "88149325502830834177707272741538263698",
                "104081780024832426122495621692374432985",
                "320309570822310705485919480150939913446"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs12/p12_kiss.c"
        },
        "id": "CVE-2026-22796-3311f579"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e",
        "digest": {
            "line_hashes": [
                "71476756686855470599937379985047700091",
                "166895001063044813957862891151407698928",
                "278712318572386455087903167506773264569",
                "62751701112678304274354497278072631412",
                "305528711857785099232457614306160091925"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "apps/s_client.c"
        },
        "id": "CVE-2026-22796-3ae22c42"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4",
        "digest": {
            "line_hashes": [
                "71476756686855470599937379985047700091",
                "166895001063044813957862891151407698928",
                "278712318572386455087903167506773264569",
                "62751701112678304274354497278072631412",
                "305528711857785099232457614306160091925"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "apps/s_client.c"
        },
        "id": "CVE-2026-22796-564c849c"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12",
        "digest": {
            "length": 48972.0,
            "function_hash": "137663506870388774154075225648218501066"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "apps/s_client.c",
            "function": "s_client_main"
        },
        "id": "CVE-2026-22796-5e98e146"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e",
        "digest": {
            "line_hashes": [
                "246451924573170111765630526962404097757",
                "196617962610438348365718973266564583117",
                "284857352021339567897482824767365180593",
                "273428943801490059425881941273658322840"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs7/pk7_doit.c"
        },
        "id": "CVE-2026-22796-68a85aee"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4",
        "digest": {
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        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs12/p12_kiss.c"
        },
        "id": "CVE-2026-22796-86099db0"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49",
        "digest": {
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        "signature_type": "Line",
        "target": {
            "file": "apps/s_client.c"
        },
        "id": "CVE-2026-22796-8f8ff17b"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2",
        "digest": {
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        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "apps/s_client.c"
        },
        "id": "CVE-2026-22796-991d33fa"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/7bbca05be55b129651d9df4bdb92becc45002c12",
        "digest": {
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                "284857352021339567897482824767365180593",
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            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs7/pk7_doit.c"
        },
        "id": "CVE-2026-22796-af52563c"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/572844beca95068394c916626a6d3a490f831a49",
        "digest": {
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        },
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        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs7/pk7_doit.c"
        },
        "id": "CVE-2026-22796-d52a9a4d"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/2502e7b7d4c0cf4f972a881641fe09edc67aeec4",
        "digest": {
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            ],
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        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
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        },
        "id": "CVE-2026-22796-d6153be7"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/ef2fb66ec571564d64d1c74a12e388a2a54d05d2",
        "digest": {
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        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "crypto/pkcs7/pk7_doit.c"
        },
        "id": "CVE-2026-22796-f144311b"
    },
    {
        "source": "https://github.com/openssl/openssl/commit/eeee3cbd4d682095ed431052f00403004596373e",
        "digest": {
            "length": 48969.0,
            "function_hash": "127898544240712534256163966369522564864"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "apps/s_client.c",
            "function": "s_client_main"
        },
        "id": "CVE-2026-22796-fbed4a44"
    }
]