{"id":"CVE-2023-52494","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: host: Add alignment check for event ring read pointer\n\nThough we do check the event ring read pointer by \"is_valid_ring_ptr\"\nto make sure it is in the buffer …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: host: Add alignment check for event ring read pointer\n\nThough we do check the event ring read pointer by \"is_valid_ring_ptr\"\nto make sure it is in the buffer …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.13, < 5.15.149","linux_kernel >= 5.16, < 6.1.76","linux_kernel >= 6.2, < 6.6.15","linux_kernel >= 6.7, < 6.7.3"],"patched":["linux_kernel 6.7.3"],"published":"2024-03-11","updated":"2026-07-24","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-52494","references":[{"url":"https://git.kernel.org/stable/c/2df39ac8f813860f79782807c3f7acff40b3c551","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/76ed0c6f6418cec6efe6f65a0b91f84be80b72eb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/94991728c84f8df54fd9eec9b85855ef9057ea08","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a9ebfc405fe1be145f414eafadcbf09506082010","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ecf8320111822a1ae5d5fc512953eab46d543d0b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eff9704f5332a13b08fbdbe0f84059c9e7051d5f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2df39ac8f813860f79782807c3f7acff40b3c551","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/94991728c84f8df54fd9eec9b85855ef9057ea08","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/a9ebfc405fe1be145f414eafadcbf09506082010","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/ecf8320111822a1ae5d5fc512953eab46d543d0b","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/eff9704f5332a13b08fbdbe0f84059c9e7051d5f","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.0028,"epssPercentile":0.20733,"ingestedAt":"2026-07-24T15:30:57.189Z","slug":"CVE-2023-52494","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: host: Add alignment check for event ring read pointer\n\nThough we do check the event ring read pointer by \"is_valid_ring_ptr\"\nto make sure it is in the buffer range, but there is another risk the\npointer may be not aligned.  Since we are expecting event ring elements\nare 128 bits(struct mhi_ring_element) aligned, an unaligned read pointer\ncould lead to multiple issues like DoS or ring buffer memory corruption.\n\nSo add a alignment check for event ring read pointer.\n\n## Affected\n\n- `linux_kernel >= 5.13, < 5.15.149`\n- `linux_kernel >= 5.16, < 6.1.76`\n- `linux_kernel >= 6.2, < 6.6.15`\n- `linux_kernel >= 6.7, < 6.7.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.7.3`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}