{"api_version":"1","generated_at":"2026-10-15T02:26:46+00:00","cve":"CVE-2026-68279","urls":{"html":"https://cve.report/CVE-2026-68279","api":"https://cve.report/api/cve/CVE-2026-68279.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68279","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68279"},"summary":{"title":"drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers\n\ndrm_dp_sideband_parse_remote_dpcd_read() reads num_bytes from the raw\nmessage and then unconditionally does:\n\n  memcpy(bytes, &raw->msg[idx], num_bytes);\n\nwithout checking that idx + num_bytes <= raw->curlen. raw->msg[] is\n256 bytes; if a malicious or misbehaving MST hub sets num_bytes larger\nthan the remaining payload, the memcpy reads past the received data\ninto whatever follows in raw->msg[].\n\ndrm_dp_sideband_parse_remote_i2c_read_ack() has the same flaw (noted\nwith a /* TODO check */ comment since the code was introduced).\n\nFix both functions by using a single combined check\n(idx + num_bytes > curlen) before each memcpy. Since num_bytes is u8,\nit is always >= 0, so this strictly subsumes the simpler idx > curlen\nform and no separate step is needed.\n\n[added missing fixes tag]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:17","updated_at":"2026-08-23 13:16:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/185de1d74e658e2edb723ba76fa61903f77d8a68","name":"https://git.kernel.org/stable/c/185de1d74e658e2edb723ba76fa61903f77d8a68","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1a8f537f5a1eeac941f262fe73078d6b08ba83c0","name":"https://git.kernel.org/stable/c/1a8f537f5a1eeac941f262fe73078d6b08ba83c0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c2fbda0fe0163c55ba3820ee6cea0c6b43622eda","name":"https://git.kernel.org/stable/c/c2fbda0fe0163c55ba3820ee6cea0c6b43622eda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586","name":"https://git.kernel.org/stable/c/d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/533d9e2bede4aeefdc2a0561d7071cfede95958f","name":"https://git.kernel.org/stable/c/533d9e2bede4aeefdc2a0561d7071cfede95958f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/04d953f50d61e542e94a5977822cc53735f8c0ce","name":"https://git.kernel.org/stable/c/04d953f50d61e542e94a5977822cc53735f8c0ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2","name":"https://git.kernel.org/stable/c/22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e6ef5455b06cb4e5d181aabcd723791587c79f12","name":"https://git.kernel.org/stable/c/e6ef5455b06cb4e5d181aabcd723791587c79f12","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68279","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68279","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ad7f8a1f9ced7f049f9b66d588723f243a7034cd 185de1d74e658e2edb723ba76fa61903f77d8a68 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ad7f8a1f9ced7f049f9b66d588723f243a7034cd d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ad7f8a1f9ced7f049f9b66d588723f243a7034cd c2fbda0fe0163c55ba3820ee6cea0c6b43622eda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ad7f8a1f9ced7f049f9b66d588723f243a7034cd 22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.217 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"68279","cve":"CVE-2026-68279","epss":"0.001840000","percentile":"0.080090000","score_date":"2026-08-24","updated_at":"2026-08-25 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the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers\n\ndrm_dp_sideband_parse_remote_dpcd_read() reads num_bytes from the raw\nmessage and then unconditionally does:\n\n  memcpy(bytes, &raw->msg[idx], num_bytes);\n\nwithout checking that idx + num_bytes <= raw->curlen. raw->msg[] is\n256 bytes; if a malicious or misbehaving MST hub sets num_bytes larger\nthan the remaining payload, the memcpy reads past the received data\ninto whatever follows in raw->msg[].\n\ndrm_dp_sideband_parse_remote_i2c_read_ack() has the same flaw (noted\nwith a /* TODO check */ comment since the code was introduced).\n\nFix both functions by using a single combined check\n(idx + num_bytes > curlen) before each memcpy. Since num_bytes is u8,\nit is always >= 0, so this strictly subsumes the simpler idx > curlen\nform and no separate step is needed.\n\n[added missing fixes tag]"}],"providerMetadata":{"dateUpdated":"2026-08-23T12:46:16.563Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/185de1d74e658e2edb723ba76fa61903f77d8a68"},{"url":"https://git.kernel.org/stable/c/d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586"},{"url":"https://git.kernel.org/stable/c/c2fbda0fe0163c55ba3820ee6cea0c6b43622eda"},{"url":"https://git.kernel.org/stable/c/22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2"},{"url":"https://git.kernel.org/stable/c/04d953f50d61e542e94a5977822cc53735f8c0ce"},{"url":"https://git.kernel.org/stable/c/533d9e2bede4aeefdc2a0561d7071cfede95958f"},{"url":"https://git.kernel.org/stable/c/e6ef5455b06cb4e5d181aabcd723791587c79f12"},{"url":"https://git.kernel.org/stable/c/1a8f537f5a1eeac941f262fe73078d6b08ba83c0"}],"title":"drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68279","datePublished":"2026-08-10T12:02:09.423Z","dateReserved":"2026-07-30T09:28:09.379Z","dateUpdated":"2026-08-23T12:46:16.563Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:17","lastModifiedDate":"2026-08-23 13:16:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68279","Ordinal":"1","Title":"drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply pars","CVE":"CVE-2026-68279","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68279","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers\n\ndrm_dp_sideband_parse_remote_dpcd_read() reads num_bytes from the raw\nmessage and then unconditionally does:\n\n  memcpy(bytes, &raw->msg[idx], num_bytes);\n\nwithout checking that idx + num_bytes <= raw->curlen. raw->msg[] is\n256 bytes; if a malicious or misbehaving MST hub sets num_bytes larger\nthan the remaining payload, the memcpy reads past the received data\ninto whatever follows in raw->msg[].\n\ndrm_dp_sideband_parse_remote_i2c_read_ack() has the same flaw (noted\nwith a /* TODO check */ comment since the code was introduced).\n\nFix both functions by using a single combined check\n(idx + num_bytes > curlen) before each memcpy. Since num_bytes is u8,\nit is always >= 0, so this strictly subsumes the simpler idx > curlen\nform and no separate step is needed.\n\n[added missing fixes tag]","Type":"Description","Title":"drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply pars"}]}}}