{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68279", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.379Z", "datePublished": "2026-08-10T12:02:09.423Z", "dateUpdated": "2026-08-10T12:02:09.423Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-10T12:02:09.423Z"}, "descriptions": [{"lang": "en", "value": "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]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/display/drm_dp_mst_topology.c"], "versions": [{"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd", "lessThan": "22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2", "status": "affected", "versionType": "git"}, {"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd", "lessThan": "04d953f50d61e542e94a5977822cc53735f8c0ce", "status": "affected", "versionType": "git"}, {"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd", "lessThan": "533d9e2bede4aeefdc2a0561d7071cfede95958f", "status": "affected", "versionType": "git"}, {"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd", "lessThan": "e6ef5455b06cb4e5d181aabcd723791587c79f12", "status": "affected", "versionType": "git"}, {"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd", "lessThan": "1a8f537f5a1eeac941f262fe73078d6b08ba83c0", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/display/drm_dp_mst_topology.c"], "versions": [{"version": "3.17", "status": "affected"}, {"version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "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": "3.17", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"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"}}}}

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{}

{"created": "2026-08-10T15:30:05.873259+00:00", "updated": "2026-08-10T15:30:05.873265+00:00", "vendors": [], "weaknesses": ["CWE-119"]}