{"id":"CVE-2023-52615","state":"PUBLISHED","title":"hwrng: core - Fix page fault dead lock on mmap-ed hwrng","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: core - Fix page fault dead lock on mmap-ed hwrng\n\nThere is a dead-lock in the hwrng device read path.  This triggers\nwhen the user reads from /dev/hwrng into memory also mmap-ed from\n/dev/hwrng.  The resulting page fault triggers a recursive read\nwhich then dead-locks.\n\nFix this by using a stack buffer when calling copy_to_user.","publishedAt":"2024-03-18T10:14:45.503Z","updatedAt":"2026-05-11T19:30:24.584Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"eafd83b92f6c044007a3591cbd476bcf90455990","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"5030d4c798863ccb266563201b341a099e8cdd48","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"c6a8111aacbfe7a8a70f46cc0de8eed00561693c","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"26cc6d7006f922df6cc4389248032d955750b2a0","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"aa8aa16ed9adf1df05bb339d588cf485a011839e","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"ecabe8cd456d3bf81e92c53b074732f3140f170d","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"6822a14271786150e178869f1495cc03e74c5029","versionType":"git"},{"version":"9996508b3353063f2d6c48c1a28a84543d72d70b","status":"affected","lessThan":"78aafb3884f6bc6636efcc1760c891c8500b9922","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/hw_random/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.33","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.33","versionType":"semver"},{"version":"4.19.307","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.269","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.210","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.149","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.76","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.15","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.3","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/hw_random/core.c"]}],"references":["https://git.kernel.org/stable/c/eafd83b92f6c044007a3591cbd476bcf90455990","https://git.kernel.org/stable/c/5030d4c798863ccb266563201b341a099e8cdd48","https://git.kernel.org/stable/c/c6a8111aacbfe7a8a70f46cc0de8eed00561693c","https://git.kernel.org/stable/c/26cc6d7006f922df6cc4389248032d955750b2a0","https://git.kernel.org/stable/c/aa8aa16ed9adf1df05bb339d588cf485a011839e","https://git.kernel.org/stable/c/ecabe8cd456d3bf81e92c53b074732f3140f170d","https://git.kernel.org/stable/c/6822a14271786150e178869f1495cc03e74c5029","https://git.kernel.org/stable/c/78aafb3884f6bc6636efcc1760c891c8500b9922","https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52615.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52615","state":"PUBLISHED","datePublished":"2024-03-18T10:14:45.503Z","dateUpdated":"2026-05-11T19:30:24.584Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-06T09:52:12.089Z"},"containers":{"cna":{"title":"hwrng: core - Fix page fault dead lock on mmap-ed hwrng","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: core - Fix page fault dead lock on mmap-ed hwrng\n\nThere is a dead-lock in the hwrng device read path.  This triggers\nwhen the user reads from /dev/hwrng into memory also mmap-ed from\n/dev/hwrng.  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