{"id":"CVE-2026-64483","state":"PUBLISHED","title":"ALSA: firewire: isight: bound the sample count to the packet payload","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire: isight: bound the sample count to the packet payload\n\nisight_packet() takes the frame count from the device iso packet and\nchecks it only against the device claimed iso length.\n\n\tcount = be32_to_cpu(payload->sample_count);\n\tif (likely(count <= (length - 16) / 4))\n\t\tisight_samples(isight, payload->samples, count);\n\nlength is the iso header data_length. It can be up to 0xffff. So the\ngate allows a count up to about 16379. isight_samples() then copies\ncount frames out of payload->samples into the PCM DMA buffer.\n\npayload->samples holds only 2 * MAX_FRAMES_PER_PACKET values. The\ndevice multiplexes two samples per frame. A count past\nMAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer\nsize writes past runtime->dma_area. The smallest PCM buffer is larger\nthan MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET\nkeeps both the read and the write in range.\n\nA malicious or faulty Apple iSight on the FireWire bus reaches this\nduring a normal capture.\n\nAdd the MAX_FRAMES_PER_PACKET bound to the gate.","publishedAt":"2026-07-25T08:51:43.851Z","updatedAt":"2026-08-17T04:56:30.281Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"24423e0a9251d348c3f1fb0bb0e61b879e1e976c","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"ebbffacda6733dcbcef601b5b523460f8d8b671e","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"57e4d9043afc1eaddee8f50d11def6e65415d273","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"31da82b9676c6b112e7c72c7529e6812b919742a","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"8e48a29813df8dd71503800b7acf69c12c035045","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"31a01b70bb90e3ef3147f308e2ea899e1d2485ca","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"29b9667982e4df2ed7744f86b1144f8bb58eb698","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/isight.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.0","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/isight.c"]}],"references":["https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c","https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e","https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273","https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478","https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a","https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045","https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca","https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64483.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64483","state":"PUBLISHED","datePublished":"2026-07-25T08:51:43.851Z","dateUpdated":"2026-08-17T04:56:30.281Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.791Z"},"containers":{"cna":{"title":"ALSA: firewire: isight: bound the sample count to the packet payload","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire: isight: bound the sample count to the packet payload\n\nisight_packet() takes the frame count from the device iso packet and\nchecks it only against the device claimed iso length.\n\n\tcount = be32_to_cpu(payload->sample_count);\n\tif (likely(count <= (length - 16) / 4))\n\t\tisight_samples(isight, payload->samples, count);\n\nlength is the iso header data_length. It can be up to 0xffff. So the\ngate allows a count up to about 16379. isight_samples() then copies\ncount frames out of payload->samples into the PCM DMA buffer.\n\npayload->samples holds only 2 * MAX_FRAMES_PER_PACKET values. The\ndevice multiplexes two samples per frame. A count past\nMAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer\nsize writes past runtime->dma_area. The smallest PCM buffer is larger\nthan MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET\nkeeps both the read and the write in range.\n\nA malicious or faulty Apple iSight on the FireWire bus reaches this\nduring a normal capture.\n\nAdd the MAX_FRAMES_PER_PACKET bound to the gate."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"24423e0a9251d348c3f1fb0bb0e61b879e1e976c","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"ebbffacda6733dcbcef601b5b523460f8d8b671e","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"57e4d9043afc1eaddee8f50d11def6e65415d273","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"31da82b9676c6b112e7c72c7529e6812b919742a","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"8e48a29813df8dd71503800b7acf69c12c035045","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"31a01b70bb90e3ef3147f308e2ea899e1d2485ca","versionType":"git"},{"version":"3a691b28a0ca3cf4d9010c6158318159e0275d2c","status":"affected","lessThan":"29b9667982e4df2ed7744f86b1144f8bb58eb698","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/isight.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.0","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/isight.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c"},{"url":"https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e"},{"url":"https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273"},{"url":"https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478"},{"url":"https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a"},{"url":"https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045"},{"url":"https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca"},{"url":"https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:56:30.281Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}