282 lines
14 KiB
JSON
282 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-68278",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-30T09:28:09.379Z",
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"datePublished": "2026-08-10T12:01:54.285Z",
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"dateUpdated": "2026-11-06T16:55:11.887Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-23T12:46:15.450Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix buffer overflows in sideband chunk accumulation\n\ndrm_dp_sideband_append_payload() has three related bugs when processing\ndevice-provided sideband reply data:\n\n1. Zero-length curchunk_len underflow: msg_len is a 6-bit field taken\n directly from the DP sideband header. If a device sends msg_len=0,\n curchunk_len is set to zero. The condition (curchunk_idx >= curchunk_len)\n is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow).\n drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy()\n writes 255 bytes into msg[], both far out of bounds.\n\n2. chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is\n only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks\n until curchunk_idx reaches curchunk_len, writing up to 15 bytes past\n the end of chunk[] into msg[].\n\n3. msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to\n msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256],\n so the memcpy can spill into adjacent struct fields.\n\nAll three are reachable from any DP MST device that can forge sideband\nreply messages on a physical connection."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/display/drm_dp_mst_topology.c"
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],
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"versions": [
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "ef2ecb6cf268debf3890df99fea01b6452dcf78e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "d4e05dedb252ed3e540a0c9be511e427f098110a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "4d5109075a787de28c9e89940f9dee45269f91fa",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "53937a2787d29c7a460e984dc4f20ff6ac91dc65",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "ef0dbcc200c3389f1f781ab181932a97e54b51af",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "1e5827839ad0ceb0079d1560c321fa3656b54f21",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "a6366b551079c79bf7bdbadd74c97358bcfe2d58",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad7f8a1f9ced7f049f9b66d588723f243a7034cd",
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"lessThan": "55bd5e685bda455b9b50c835f8c8442d52a344a3",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/display/drm_dp_mst_topology.c"
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],
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"versions": [
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{
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"version": "3.17",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.17",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.266",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.217",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.148",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.101",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.42",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "5.10.266"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "5.15.217"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.1.183"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.6.148"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.12.101"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.18.42"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "7.1.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ef2ecb6cf268debf3890df99fea01b6452dcf78e"
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},
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{
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"url": "https://git.kernel.org/stable/c/d4e05dedb252ed3e540a0c9be511e427f098110a"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d5109075a787de28c9e89940f9dee45269f91fa"
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},
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{
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"url": "https://git.kernel.org/stable/c/53937a2787d29c7a460e984dc4f20ff6ac91dc65"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef0dbcc200c3389f1f781ab181932a97e54b51af"
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},
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{
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"url": "https://git.kernel.org/stable/c/1e5827839ad0ceb0079d1560c321fa3656b54f21"
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},
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{
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"url": "https://git.kernel.org/stable/c/a6366b551079c79bf7bdbadd74c97358bcfe2d58"
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},
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{
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"url": "https://git.kernel.org/stable/c/55bd5e685bda455b9b50c835f8c8442d52a344a3"
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}
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],
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"title": "drm/dp/mst: fix buffer overflows in sideband chunk accumulation",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68278",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T16:46:30.684747Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T16:55:11.887Z"
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}
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}
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]
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}
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} |