{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-26980", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.204Z", "datePublished": "2024-05-01T05:26:56.744Z", "dateUpdated": "2026-08-05T11:28:49.476Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:28:49.476Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf\n\nIf ->ProtocolId is SMB2_TRANSFORM_PROTO_NUM, smb2 request size\nvalidation could be skipped. if request size is smaller than\nsizeof(struct smb2_query_info_req), slab-out-of-bounds read can happen in\nsmb2_allocate_rsp_buf(). This patch allocate response buffer after\ndecrypting transform request. smb3_decrypt_req() will validate transform\nrequest size and avoid slab-out-of-bound in smb2_allocate_rsp_buf()." } ], "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 - ksmbd is the in-kernel SMB server listening on TCP/445, and the malformed SMB2 transform PDU arrives directly from a remote peer over the network. No local access to the target is required.\nAC:L - A single hand-crafted 41-byte packet suffices — the attacker deterministically sets ProtocolId to SMB2_TRANSFORM_PROTO_NUM and places 0x0010 (SMB2_QUERY_INFO) in the Signature bytes that alias smb2_hdr->Command, with no race, no memory-layout luck, and no condition outside the attacker's control.\nPR:N - smb2_allocate_rsp_buf() runs in __handle_ksmbd_work() before decrypt_req(), init_rsp_hdr(), check_user_session() and ksmbd_verify_smb_message(), so the very first packet on a fresh TCP connection reaches it with no NEGOTIATE, session setup, or credentials of any kind.\nUI:N - The attacker's own TCP connection to port 445 drives the entire sequence; no administrator or local user on the target has to take any action.\nS:U - The out-of-bounds slab read and any resulting fault occur entirely within the kernel's own security authority, crossing no VM, IOMMU, or sandbox boundary.\nC:L - Two bytes of adjacent slab memory are read past the undersized request_buf and steer the response-buffer size (448 vs 448 + max_trans_size), which is observable to the remote attacker only as an allocation/timing oracle; the bytes themselves are never returned in the SMB response, so disclosure is limited rather than total.\nI:N - The defect is purely a read of InfoType/FileInfoClass — nothing is written out of bounds and no kernel state is corrupted on this path.\nA:H - The read crosses the slab object boundary and faults or reports on KASAN, KFENCE and MTE-instrumented kernels, panicking the box under panic_on_warn=1 or kasan.fault=panic, and an unauthenticated remote attacker can retrigger it from new connections at unlimited rate." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/smb/server/server.c" ], "versions": [ { "version": "0626e6641f6b467447c81dd7678a69c66f7746cf", "lessThan": "da21401372607c49972ea87a6edaafb36a17c325", "status": "affected", "versionType": "git" }, { "version": "0626e6641f6b467447c81dd7678a69c66f7746cf", "lessThan": "b80ba648714e6d790d69610cf14656be222d0248", "status": "affected", "versionType": "git" }, { "version": "0626e6641f6b467447c81dd7678a69c66f7746cf", "lessThan": "3160d9734453a40db248487f8204830879c207f1", "status": "affected", "versionType": "git" }, { "version": "0626e6641f6b467447c81dd7678a69c66f7746cf", "lessThan": "0977f89722eceba165700ea384f075143f012085", "status": "affected", "versionType": "git" }, { "version": "0626e6641f6b467447c81dd7678a69c66f7746cf", "lessThan": "c119f4ede3fa90a9463f50831761c28f989bfb20", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/smb/server/server.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.159", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.88", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.29", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.8", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "5.15", "versionEndExcluding": "5.15.159" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.88" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.29" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.8.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/da21401372607c49972ea87a6edaafb36a17c325" }, { "url": "https://git.kernel.org/stable/c/b80ba648714e6d790d69610cf14656be222d0248" }, { "url": "https://git.kernel.org/stable/c/3160d9734453a40db248487f8204830879c207f1" }, { "url": "https://git.kernel.org/stable/c/0977f89722eceba165700ea384f075143f012085" }, { "url": "https://git.kernel.org/stable/c/c119f4ede3fa90a9463f50831761c28f989bfb20" } ], "title": "ksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-06T18:49:02.279322Z", "id": "CVE-2024-26980", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-06T15:14:12.175Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/da21401372607c49972ea87a6edaafb36a17c325", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b80ba648714e6d790d69610cf14656be222d0248", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3160d9734453a40db248487f8204830879c207f1", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/0977f89722eceba165700ea384f075143f012085", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c119f4ede3fa90a9463f50831761c28f989bfb20", "tags": [ "x_transferred" ] }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T17:14:51.828Z" } } ] } }