{"id":"CVE-2026-98755","title":"tty: vcc: zero-initialize control packet in vcc_send_ctl()","summary":"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 uninitiali…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cvssSource":"vendor","cwe":["CWE-908"],"vendor":"Linux","product":"Linux","affected":["Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed","Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 6f1a08ef02825b440126c406ea63ef6128888e15","Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 4335278d0e75395cbfaf71c84b521df56d69e936","Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 399aa38af1d78001612e3130b2056ea392a355ca","Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 1f71f565e3585da1098ff19ca3c24687dab59185","Linux 4.14"],"published":"2026-10-18","updated":"2026-10-26","sourceUpdated":"2026-10-26T06:55:50.094Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98755","references":[{"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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98755.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98755"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555179"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98755"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98755"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98755.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.05987,"ingestedAt":"2026-10-18T16:47:32.497Z","slug":"CVE-2026-98755","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed`\n- `Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 6f1a08ef02825b440126c406ea63ef6128888e15`\n- `Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 4335278d0e75395cbfaf71c84b521df56d69e936`\n- `Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 399aa38af1d78001612e3130b2056ea392a355ca`\n- `Linux >= 8868e44a56160328cd4003d95f4083f64b136e33 < 1f71f565e3585da1098ff19ca3c24687dab59185`\n- `Linux 4.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98755.json)","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228184,"id":"CVE-2026-98755","ts":1792758173701,"field":"cvss","old":null,"new":"3.3"},{"seq":228183,"id":"CVE-2026-98755","ts":1792758173701,"field":"severity","old":"none","new":"low"}]}