{"id":"CVE-2021-47016","state":"PUBLISHED","title":"m68k: mvme147,mvme16x: Don't wipe PCC timer config bits","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nm68k: mvme147,mvme16x: Don't wipe PCC timer config bits\n\nDon't clear the timer 1 configuration bits when clearing the interrupt flag\nand counter overflow. As Michael reported, \"This results in no timer\ninterrupts being delivered after the first. Initialization then hangs\nin calibrate_delay as the jiffies counter is not updated.\"\n\nOn mvme16x, enable the timer after requesting the irq, consistent with\nmvme147.","publishedAt":"2024-02-29T22:31:13.115Z","updatedAt":"2026-05-11T13:46:19.823Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7529b90d051e4629884771ba2b1d3a87d2c6a9d7","status":"affected","lessThan":"f6a90818a32058fca62cda3a2027a6a2364e1878","versionType":"git"},{"version":"7529b90d051e4629884771ba2b1d3a87d2c6a9d7","status":"affected","lessThan":"1dfb26df15fc7036a74221d43de7427f74293dae","versionType":"git"},{"version":"7529b90d051e4629884771ba2b1d3a87d2c6a9d7","status":"affected","lessThan":"73fdeb612d25b5e105c219e05434285a45d23576","versionType":"git"},{"version":"7529b90d051e4629884771ba2b1d3a87d2c6a9d7","status":"affected","lessThan":"5d34225169346cab5145978d153b9ce90e9ace21","versionType":"git"},{"version":"7529b90d051e4629884771ba2b1d3a87d2c6a9d7","status":"affected","lessThan":"43262178c043032e7c42d00de44c818ba05f9967","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/m68k/include/asm/mvme147hw.h","arch/m68k/mvme147/config.c","arch/m68k/mvme16x/config.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.2","versionType":"semver"},{"version":"5.4.119","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.37","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.21","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.4","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/m68k/include/asm/mvme147hw.h","arch/m68k/mvme147/config.c","arch/m68k/mvme16x/config.c"]}],"references":["https://git.kernel.org/stable/c/f6a90818a32058fca62cda3a2027a6a2364e1878","https://git.kernel.org/stable/c/1dfb26df15fc7036a74221d43de7427f74293dae","https://git.kernel.org/stable/c/73fdeb612d25b5e105c219e05434285a45d23576","https://git.kernel.org/stable/c/5d34225169346cab5145978d153b9ce90e9ace21","https://git.kernel.org/stable/c/43262178c043032e7c42d00de44c818ba05f9967"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47016.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47016","state":"PUBLISHED","datePublished":"2024-02-29T22:31:13.115Z","dateUpdated":"2026-05-11T13:46:19.823Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-27T18:42:55.954Z"},"containers":{"cna":{"title":"m68k: mvme147,mvme16x: Don't wipe PCC timer config bits","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nm68k: mvme147,mvme16x: Don't wipe PCC timer config bits\n\nDon't clear the timer 1 configuration bits when clearing the interrupt flag\nand counter overflow. 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