{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2023-52669", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-07T14:49:46.885Z", "datePublished": "2024-05-17T14:01:57.025Z", "dateUpdated": "2026-08-05T09:10:57.565Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:57.565Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: s390/aes - Fix buffer overread in CTR mode\n\nWhen processing the last block, the s390 ctr code will always read\na whole block, even if there isn't a whole block of data left. Fix\nthis by using the actual length left and copy it into a buffer first\nfor processing." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 8.2, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - rfc3686(ctr(aes)) is an XFRM/ESP transform that resolves to ctr-aes-s390; on an IPsec gateway, attacker-controlled forwarded packet lengths hit authenc encrypt which calls crypto_skcipher_encrypt before ICV generation, so the vulnerable CTR path processes remote traffic.\nAC:L - The attacker reliably triggers the partial final-block path by choosing a cryptlen that is not a multiple of AES_BLOCK_SIZE, and can place that remainder near a page boundary via packet or AF_ALG buffer sizing with no uncontrollable race.\nPR:N - Outbound ESP encryption on a configured IPsec/XFRM path runs on forwarded packets without a local account or capability; SA/policy setup is deployment configuration, not attacker privilege.\nUI:N - No victim interaction is required; crafted packet lengths or local AF_ALG send/recv sequences alone exercise the vulnerable final-block read.\nS:U - Impact stays inside the same kernel authority (crypto/XFRM on the host) and does not demonstrate VM escape, IOMMU bypass, or another cross-scope boundary.\nC:L - The bug over-reads up to 15 bytes of adjacent source memory into the KMCTR path; that is a strictly bounded OOB read (not arbitrary), and the truncated memcpy to dst does not return those bytes, so confidentiality is limited rather than high.\nI:N - This is a source overread only—destination writes are already limited to nbytes—and CTR output for the valid bytes is not an integrity-corrupting write primitive.\nA:H - Reading a full AES block when nbytes is smaller can touch the next page beyond the scatterwalk mapping (or a guard/KFENCE page), causing a kernel fault/oops and denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/s390/crypto/aes_s390.c", "arch/s390/crypto/paes_s390.c" ], "versions": [ { "version": "0200f3ecc19660bebeabbcbaf212957fcf1dbf8f", "lessThan": "cd51e26a3b89706beec64f2d8296cfb1c34e0c79", "status": "affected", "versionType": "git" }, { "version": "0200f3ecc19660bebeabbcbaf212957fcf1dbf8f", "lessThan": "a7f580cdb42ec3d53bbb7c4e4335a98423703285", "status": "affected", "versionType": "git" }, { "version": "0200f3ecc19660bebeabbcbaf212957fcf1dbf8f", "lessThan": "dbc9a791a70ea47be9f2acf251700fe254a2ab23", "status": "affected", "versionType": "git" }, { "version": "0200f3ecc19660bebeabbcbaf212957fcf1dbf8f", "lessThan": "d68ac38895e84446848b7647ab9458d54cacba3e", "status": "affected", "versionType": "git" }, { "version": "0200f3ecc19660bebeabbcbaf212957fcf1dbf8f", "lessThan": "e78f1a43e72daf77705ad5b9946de66fc708b874", "status": "affected", "versionType": "git" }, { "version": "0200f3ecc19660bebeabbcbaf212957fcf1dbf8f", "lessThan": "d07f951903fa9922c375b8ab1ce81b18a0034e3b", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/s390/crypto/aes_s390.c", "arch/s390/crypto/paes_s390.c" ], "versions": [ { "version": "3.0", "status": "affected" }, { "version": "0", "lessThan": "3.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.210", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.149", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.76", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.15", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.3", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "5.10.210" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "5.15.149" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.1.76" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.6.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cd51e26a3b89706beec64f2d8296cfb1c34e0c79" }, { "url": "https://git.kernel.org/stable/c/a7f580cdb42ec3d53bbb7c4e4335a98423703285" }, { "url": "https://git.kernel.org/stable/c/dbc9a791a70ea47be9f2acf251700fe254a2ab23" }, { "url": "https://git.kernel.org/stable/c/d68ac38895e84446848b7647ab9458d54cacba3e" }, { "url": "https://git.kernel.org/stable/c/e78f1a43e72daf77705ad5b9946de66fc708b874" }, { "url": "https://git.kernel.org/stable/c/d07f951903fa9922c375b8ab1ce81b18a0034e3b" } ], "title": "crypto: s390/aes - Fix buffer overread in CTR mode", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-52669", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-24T14:16:01.568740Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:24:13.633Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:11:34.492Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/cd51e26a3b89706beec64f2d8296cfb1c34e0c79", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a7f580cdb42ec3d53bbb7c4e4335a98423703285", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dbc9a791a70ea47be9f2acf251700fe254a2ab23", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d68ac38895e84446848b7647ab9458d54cacba3e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e78f1a43e72daf77705ad5b9946de66fc708b874", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d07f951903fa9922c375b8ab1ce81b18a0034e3b", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] } ] } ] }, "dataVersion": "5.2" }