{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68277","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-30T09:28:09.379Z","datePublished":"2026-08-10T12:01:53.085Z","dateUpdated":"2026-08-23T12:46:14.372Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-23T12:46:14.372Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix OOB reads on 2-byte fields in sideband reply parsers\n\nThree sideband reply parsers read 16-bit fields as:\n\n  val = (raw->msg[idx] << 8) | (raw->msg[idx+1]);\n\nand check bounds only after the fact. When idx == raw->curlen,\nraw->msg[idx+1] reads one byte past the received message data into\nthe following struct fields (curchunk_len, curchunk_idx, curlen).\n\nAffected functions:\n - drm_dp_sideband_parse_enum_path_resources_ack()\n   full_payload_bw_number and avail_payload_bw_number fields\n - drm_dp_sideband_parse_allocate_payload_ack()\n   allocated_pbn field\n - drm_dp_sideband_parse_query_payload_ack()\n   allocated_pbn field\n\nFix by using a single combined check (idx + 2 > curlen) before each\n2-byte read. Since the check is strictly tighter than idx > curlen,\nno separate step is needed.\n\n[added 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":"c1f72a13d54ffd16647d3fa540d961f5deba8790","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"192e146c2d57ad033b0d418ec64ee390f8dc074e","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"6e3107e6522109a07fc9bb0fc4ec463f1982e113","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"bdf0508b1e6785d4a8982c637e97e68d60b47d7b","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"0bcd7675c69a2462a8531fcd9e4d096e9c7ec5df","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"d5c70523cafa26ad2c7a37b612849abe2683baa8","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73","status":"affected","versionType":"git"},{"version":"ad7f8a1f9ced7f049f9b66d588723f243a7034cd","lessThan":"6b89ba3dba2f583626fb693e47e951ffb8bf591f","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":"5.10.266","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.217","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","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","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":"5.10.266"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"5.15.217"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"6.1.183"},{"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"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c1f72a13d54ffd16647d3fa540d961f5deba8790"},{"url":"https://git.kernel.org/stable/c/192e146c2d57ad033b0d418ec64ee390f8dc074e"},{"url":"https://git.kernel.org/stable/c/6e3107e6522109a07fc9bb0fc4ec463f1982e113"},{"url":"https://git.kernel.org/stable/c/bdf0508b1e6785d4a8982c637e97e68d60b47d7b"},{"url":"https://git.kernel.org/stable/c/0bcd7675c69a2462a8531fcd9e4d096e9c7ec5df"},{"url":"https://git.kernel.org/stable/c/d5c70523cafa26ad2c7a37b612849abe2683baa8"},{"url":"https://git.kernel.org/stable/c/68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73"},{"url":"https://git.kernel.org/stable/c/6b89ba3dba2f583626fb693e47e951ffb8bf591f"}],"title":"drm/dp/mst: fix OOB reads on 2-byte fields in sideband reply parsers","x_generator":{"engine":"bippy-1.2.0"}}}}