{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2022-49554","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T02:08:31.590Z","datePublished":"2025-02-26T02:14:02.649Z","dateUpdated":"2025-05-04T08:40:26.141Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T08:40:26.141Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nzsmalloc: fix races between asynchronous zspage free and page migration\n\nThe asynchronous zspage free worker tries to lock a zspage's entire page\nlist without defending against page migration.  Since pages which haven't\nyet been locked can concurrently migrate off the zspage page list while\nlock_zspage() churns away, lock_zspage() can suffer from a few different\nlethal races.\n\nIt can lock a page which no longer belongs to the zspage and unsafely\ndereference page_private(), it can unsafely dereference a torn pointer to\nthe next page (since there's a data race), and it can observe a spurious\nNULL pointer to the next page and thus not lock all of the zspage's pages\n(since a single page migration will reconstruct the entire page list, and\ncreate_page_chain() unconditionally zeroes out each list pointer in the\nprocess).\n\nFix the races by using migrate_read_lock() in lock_zspage() to synchronize\nwith page migration."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/zsmalloc.c"],"versions":[{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"3674d8a8dadd03a447dd21069d4dacfc3399b63b","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"645996efc2ae391246d595832aaa6f9d3cc338c7","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"fc658c083904427abbf8f18280d517ee2668677c","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"fae05b2314b147a78fbed1dc4c645d9a66313758","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"3ec459c8810e658401be428d3168eacfc380bdd0","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"8ba7b7c1dad1f6503c541778f31b33f7f62eb966","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"c5402fb5f71f1a725f1e55d9c6799c0c7bec308f","status":"affected","versionType":"git"},{"version":"77ff465799c60294e248000cd22ae8171da3304c","lessThan":"2505a981114dcb715f8977b8433f7540854851d8","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/zsmalloc.c"],"versions":[{"version":"4.14","status":"affected"},{"version":"0","lessThan":"4.14","status":"unaffected","versionType":"semver"},{"version":"4.14.282","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.246","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.197","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.120","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.45","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.17.13","lessThanOrEqual":"5.17.*","status":"unaffected","versionType":"semver"},{"version":"5.18.2","lessThanOrEqual":"5.18.*","status":"unaffected","versionType":"semver"},{"version":"5.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"4.14.282"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"4.19.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.4.197"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.17.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.18.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3674d8a8dadd03a447dd21069d4dacfc3399b63b"},{"url":"https://git.kernel.org/stable/c/645996efc2ae391246d595832aaa6f9d3cc338c7"},{"url":"https://git.kernel.org/stable/c/fc658c083904427abbf8f18280d517ee2668677c"},{"url":"https://git.kernel.org/stable/c/fae05b2314b147a78fbed1dc4c645d9a66313758"},{"url":"https://git.kernel.org/stable/c/3ec459c8810e658401be428d3168eacfc380bdd0"},{"url":"https://git.kernel.org/stable/c/8ba7b7c1dad1f6503c541778f31b33f7f62eb966"},{"url":"https://git.kernel.org/stable/c/c5402fb5f71f1a725f1e55d9c6799c0c7bec308f"},{"url":"https://git.kernel.org/stable/c/2505a981114dcb715f8977b8433f7540854851d8"}],"title":"zsmalloc: fix races between asynchronous zspage free and page migration","x_generator":{"engine":"bippy-1.2.0"}}}}