{"api_version":"1","generated_at":"2026-07-21T17:19:05+00:00","cve":"CVE-2026-63797","urls":{"html":"https://cve.report/CVE-2026-63797","api":"https://cve.report/api/cve/CVE-2026-63797.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63797","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63797"},"summary":{"title":"rpmsg: char: Fix use-after-free on probe error path","description":"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_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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 12:16:52","updated_at":"2026-07-20 15:16:46"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/ff268cd9ccbce6472a0658791b417bf11c31ee39","name":"https://git.kernel.org/stable/c/ff268cd9ccbce6472a0658791b417bf11c31ee39","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ff3f528e67d20e2b1483dcaba899dc7832b2e6b","name":"https://git.kernel.org/stable/c/1ff3f528e67d20e2b1483dcaba899dc7832b2e6b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b","name":"https://git.kernel.org/stable/c/ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/104d100212396801f1d9d388282f746e23e2bfd6","name":"https://git.kernel.org/stable/c/104d100212396801f1d9d388282f746e23e2bfd6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c5ebb06c7e24d531b68707168e04698859d642bc","name":"https://git.kernel.org/stable/c/c5ebb06c7e24d531b68707168e04698859d642bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63797","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63797","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bc69d10665690492421d926b1cd9a7a36bffd691 ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bc69d10665690492421d926b1cd9a7a36bffd691 c5ebb06c7e24d531b68707168e04698859d642bc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bc69d10665690492421d926b1cd9a7a36bffd691 104d100212396801f1d9d388282f746e23e2bfd6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bc69d10665690492421d926b1cd9a7a36bffd691 ff268cd9ccbce6472a0658791b417bf11c31ee39 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63797","cve":"CVE-2026-63797","epss":"0.001680000","percentile":"0.065060000","score_date":"2026-07-20","updated_at":"2026-07-21 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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."}],"metrics":[{"cvssV3_1":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:40:08.559Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b"},{"url":"https://git.kernel.org/stable/c/c5ebb06c7e24d531b68707168e04698859d642bc"},{"url":"https://git.kernel.org/stable/c/104d100212396801f1d9d388282f746e23e2bfd6"},{"url":"https://git.kernel.org/stable/c/ff268cd9ccbce6472a0658791b417bf11c31ee39"},{"url":"https://git.kernel.org/stable/c/1ff3f528e67d20e2b1483dcaba899dc7832b2e6b"}],"title":"rpmsg: char: Fix use-after-free on probe error path","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63797","datePublished":"2026-07-19T12:02:05.227Z","dateReserved":"2026-07-19T07:54:57.012Z","dateUpdated":"2026-07-20T13:40:08.559Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 12:16:52","lastModifiedDate":"2026-07-20 15:16:46","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63797","Ordinal":"1","Title":"rpmsg: char: Fix use-after-free on probe error path","CVE":"CVE-2026-63797","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63797","Ordinal":"1","NoteData":"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_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.","Type":"Description","Title":"rpmsg: char: Fix use-after-free on probe error path"}]}}}