{"id":"CVE-2026-63797","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: char: Fix use-after-free on probe error path\n\nrpmsg_chrdev_probe() stores the newly allocated eptdev in the default\nendpoint's priv pointer before calling rpmsg_…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: char: Fix use-after-free on probe error path\n\nrpmsg_chrdev_probe() stores the newly allocated eptdev in the default\nendpoint's priv pointer before calling rpmsg_…","severity":"high","published":"2026-07-19","updated":"2026-07-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63797","references":[{"url":"https://git.kernel.org/stable/c/104d100212396801f1d9d388282f746e23e2bfd6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1ff3f528e67d20e2b1483dcaba899dc7832b2e6b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c5ebb06c7e24d531b68707168e04698859d642bc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff268cd9ccbce6472a0658791b417bf11c31ee39","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63797.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-63797"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502226"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63797"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63797"},{"url":"https://lore.kernel.org/linux-cve-announce/2026071900-CVE-2026-63797-44ec@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat"],"ingestedAt":"2026-07-20T00:35:12.252Z","epss":0.00146,"epssPercentile":0.03166,"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10"],"cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-825"],"slug":"CVE-2026-63797","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: char: Fix use-after-free on probe error path\n\nrpmsg_chrdev_probe() stores the newly allocated eptdev in the default\nendpoint's priv pointer before calling rpmsg_chrdev_eptdev_add(). If\nrpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while\nthe default endpoint may still dispatch callbacks with the stale priv\npointer.\n\nAvoid publishing eptdev through the default endpoint until\nrpmsg_chrdev_eptdev_add() succeeds. Messages received before the priv\npointer is published should be ignored by rpmsg_ept_cb(). Flow-control\nupdates can hit rpmsg_ept_flow_cb() in the same window, so make both\ncallbacks return success when priv is NULL.\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** · Important · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63797.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208914,"id":"CVE-2026-63797","ts":1790062280447,"field":"cvss","old":null,"new":"7.8"},{"seq":208913,"id":"CVE-2026-63797","ts":1790062280447,"field":"severity","old":"none","new":"high"}]}