{"id":"CVE-2025-38429","title":"bus: mhi: ep: Update read pointer only after buffer is written","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: ep: Update read pointer only after buffer is written\n\nInside mhi_ep_ring_add_element, the read pointer (rd_offset) is updated\nbefore the buffer is written, po…","severity":"critical","cvss":10,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < e2176aa3ba4361e98d9f91178a762dca6cf21fe0","Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < 44b9620e82bbec2b9a6ac77f63913636d84f96dc","Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < f704a80d9fa268e51a6cc5242714502c3c1fa605","Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < 0007ef098dab48f1ba58364c40b4809f1e21b130","Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < 6f18d174b73d0ceeaa341f46c0986436b3aefc9a","Linux 5.19"],"published":"2025-07-25","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:21:58.744Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38429","references":[{"url":"https://git.kernel.org/stable/c/e2176aa3ba4361e98d9f91178a762dca6cf21fe0"},{"url":"https://git.kernel.org/stable/c/44b9620e82bbec2b9a6ac77f63913636d84f96dc"},{"url":"https://git.kernel.org/stable/c/f704a80d9fa268e51a6cc5242714502c3c1fa605"},{"url":"https://git.kernel.org/stable/c/0007ef098dab48f1ba58364c40b4809f1e21b130"},{"url":"https://git.kernel.org/stable/c/6f18d174b73d0ceeaa341f46c0986436b3aefc9a"}],"tags":["cve.org"],"epss":0.00465,"epssPercentile":0.40532,"ingestedAt":"2026-11-03T18:52:04.084Z","slug":"CVE-2025-38429","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: ep: Update read pointer only after buffer is written\n\nInside mhi_ep_ring_add_element, the read pointer (rd_offset) is updated\nbefore the buffer is written, potentially causing race conditions where\nthe host sees an updated read pointer before the buffer is actually\nwritten. Updating rd_offset prematurely can lead to the host accessing\nan uninitialized or incomplete element, resulting in data corruption.\n\nInvoke the buffer write before updating rd_offset to ensure the element\nis fully written before signaling its availability.\n\n## Affected\n\n- `Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < e2176aa3ba4361e98d9f91178a762dca6cf21fe0`\n- `Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < 44b9620e82bbec2b9a6ac77f63913636d84f96dc`\n- `Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < f704a80d9fa268e51a6cc5242714502c3c1fa605`\n- `Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < 0007ef098dab48f1ba58364c40b4809f1e21b130`\n- `Linux >= bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 < 6f18d174b73d0ceeaa341f46c0986436b3aefc9a`\n- `Linux 5.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":55,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}