{"id":"CVE-2026-63961","state":"PUBLISHED","title":"usb: typec: altmodes/displayport: validate count before reading Status Update VDO","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: validate count before reading Status Update VDO\n\nA broken/malicious device can send the incorrect count for a status\nupdate VDO, which will cause the kernel to read uninitialized stack data\nand send it off elsewhere.\n\nFix this up by correctly verifying the count for the update object.","publishedAt":"2026-07-19T14:55:50.993Z","updatedAt":"2026-07-20T06:41:41.563Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"74aabe9ea30fdfba924fce9594e6aa69a596a4bb","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"dd7118c010f324497c275e8fd7a35c9baaa2a00f","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"6ffdbcd7a02f3af8fff9b6519830369f574ed44c","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"70e7045849e954e56dcbf441b6330e66bc996306","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"64bd6ccc5799f8473d1f37d4d8f53093dfec5c02","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"77a759ec30bc5fb0dd9c867b711d0acfed6c7faa","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"8a18f896e667df491331371b55d4ad644dc51d60","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/displayport.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.93","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/displayport.c"]}],"references":["https://git.kernel.org/stable/c/74aabe9ea30fdfba924fce9594e6aa69a596a4bb","https://git.kernel.org/stable/c/dd7118c010f324497c275e8fd7a35c9baaa2a00f","https://git.kernel.org/stable/c/6ffdbcd7a02f3af8fff9b6519830369f574ed44c","https://git.kernel.org/stable/c/70e7045849e954e56dcbf441b6330e66bc996306","https://git.kernel.org/stable/c/64bd6ccc5799f8473d1f37d4d8f53093dfec5c02","https://git.kernel.org/stable/c/b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b","https://git.kernel.org/stable/c/77a759ec30bc5fb0dd9c867b711d0acfed6c7faa","https://git.kernel.org/stable/c/8a18f896e667df491331371b55d4ad644dc51d60"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63961.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63961","state":"PUBLISHED","datePublished":"2026-07-19T14:55:50.993Z","dateUpdated":"2026-07-20T06:41:41.563Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.023Z"},"containers":{"cna":{"title":"usb: typec: altmodes/displayport: validate count before reading Status Update VDO","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: validate count before reading Status Update VDO\n\nA broken/malicious device can send the incorrect count for a status\nupdate VDO, which will cause the kernel to read uninitialized stack data\nand send it off elsewhere.\n\nFix this up by correctly verifying the count for the update object."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"74aabe9ea30fdfba924fce9594e6aa69a596a4bb","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"dd7118c010f324497c275e8fd7a35c9baaa2a00f","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"6ffdbcd7a02f3af8fff9b6519830369f574ed44c","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"70e7045849e954e56dcbf441b6330e66bc996306","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"64bd6ccc5799f8473d1f37d4d8f53093dfec5c02","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"77a759ec30bc5fb0dd9c867b711d0acfed6c7faa","versionType":"git"},{"version":"0e3bb7d6894d9b6e67d6382bb03a46a1dc989588","status":"affected","lessThan":"8a18f896e667df491331371b55d4ad644dc51d60","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/displayport.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.93","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/altmodes/displayport.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/74aabe9ea30fdfba924fce9594e6aa69a596a4bb"},{"url":"https://git.kernel.org/stable/c/dd7118c010f324497c275e8fd7a35c9baaa2a00f"},{"url":"https://git.kernel.org/stable/c/6ffdbcd7a02f3af8fff9b6519830369f574ed44c"},{"url":"https://git.kernel.org/stable/c/70e7045849e954e56dcbf441b6330e66bc996306"},{"url":"https://git.kernel.org/stable/c/64bd6ccc5799f8473d1f37d4d8f53093dfec5c02"},{"url":"https://git.kernel.org/stable/c/b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b"},{"url":"https://git.kernel.org/stable/c/77a759ec30bc5fb0dd9c867b711d0acfed6c7faa"},{"url":"https://git.kernel.org/stable/c/8a18f896e667df491331371b55d4ad644dc51d60"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-20T06:41:41.563Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.12.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}