{"id":"CVE-2026-98755","state":"PUBLISHED","title":"tty: vcc: zero-initialize control packet in vcc_send_ctl()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: vcc: zero-initialize control packet in vcc_send_ctl()\n\nThe stack-allocated struct vio_vcc pkt was partially initialized,\nleaving the tag.stype_env field uninitialized before being sent via\nldc_write(), potentially leaking kernel stack data to the LDC peer.","publishedAt":"2026-10-18T15:47:41.106Z","updatedAt":"2026-10-30T12:39:25.859Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"9e2eedb3611c1a3a377105cb26af52731e826fa5","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"360111628a968ebc8e6da400b28f23ae317d4e04","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"639178bc8e77aad307a9ee5e62471c5dcc8dda67","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"6f1a08ef02825b440126c406ea63ef6128888e15","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"4335278d0e75395cbfaf71c84b521df56d69e936","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"399aa38af1d78001612e3130b2056ea392a355ca","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"1f71f565e3585da1098ff19ca3c24687dab59185","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/vcc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/vcc.c"]}],"references":["https://git.kernel.org/stable/c/9e2eedb3611c1a3a377105cb26af52731e826fa5","https://git.kernel.org/stable/c/360111628a968ebc8e6da400b28f23ae317d4e04","https://git.kernel.org/stable/c/639178bc8e77aad307a9ee5e62471c5dcc8dda67","https://git.kernel.org/stable/c/4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed","https://git.kernel.org/stable/c/6f1a08ef02825b440126c406ea63ef6128888e15","https://git.kernel.org/stable/c/4335278d0e75395cbfaf71c84b521df56d69e936","https://git.kernel.org/stable/c/399aa38af1d78001612e3130b2056ea392a355ca","https://git.kernel.org/stable/c/1f71f565e3585da1098ff19ca3c24687dab59185"],"weaknesses":[],"ingestedAt":"2026-10-30T12:58:04.520Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98755.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98755","state":"PUBLISHED","datePublished":"2026-10-18T15:47:41.106Z","dateUpdated":"2026-10-30T12:39:25.859Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.368Z"},"containers":{"cna":{"title":"tty: vcc: zero-initialize control packet in vcc_send_ctl()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: vcc: zero-initialize control packet in vcc_send_ctl()\n\nThe stack-allocated struct vio_vcc pkt was partially initialized,\nleaving the tag.stype_env field uninitialized before being sent via\nldc_write(), potentially leaking kernel stack data to the LDC peer."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"9e2eedb3611c1a3a377105cb26af52731e826fa5","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"360111628a968ebc8e6da400b28f23ae317d4e04","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"639178bc8e77aad307a9ee5e62471c5dcc8dda67","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"6f1a08ef02825b440126c406ea63ef6128888e15","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"4335278d0e75395cbfaf71c84b521df56d69e936","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"399aa38af1d78001612e3130b2056ea392a355ca","versionType":"git"},{"version":"8868e44a56160328cd4003d95f4083f64b136e33","status":"affected","lessThan":"1f71f565e3585da1098ff19ca3c24687dab59185","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/vcc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/vcc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9e2eedb3611c1a3a377105cb26af52731e826fa5"},{"url":"https://git.kernel.org/stable/c/360111628a968ebc8e6da400b28f23ae317d4e04"},{"url":"https://git.kernel.org/stable/c/639178bc8e77aad307a9ee5e62471c5dcc8dda67"},{"url":"https://git.kernel.org/stable/c/4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed"},{"url":"https://git.kernel.org/stable/c/6f1a08ef02825b440126c406ea63ef6128888e15"},{"url":"https://git.kernel.org/stable/c/4335278d0e75395cbfaf71c84b521df56d69e936"},{"url":"https://git.kernel.org/stable/c/399aa38af1d78001612e3130b2056ea392a355ca"},{"url":"https://git.kernel.org/stable/c/1f71f565e3585da1098ff19ca3c24687dab59185"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:39:25.859Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}