{"id":"CVE-2025-21950","state":"PUBLISHED","title":"drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl\n\nIn the \"pmcmd_ioctl\" function, three memory objects allocated by\nkmalloc are initialized by \"hcall_get_cpu_state\", which are then\ncopied to user space. The initializer is indeed implemented in\n\"acrn_hypercall2\" (arch/x86/include/asm/acrn.h). There is a risk of\ninformation leakage due to uninitialized bytes.","publishedAt":"2025-04-01T15:41:10.949Z","updatedAt":"2026-05-11T21:09:40.823Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"524f29d78c9bdeb49f31f5b0376a07d2fc5cf563","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"d7e5031fe3f161c8eb5e84db1540bc4373ed861b","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"a4c21b878f0e237f45209a324c903ea7fb05247d","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virt/acrn/hsm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.131","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.83","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.19","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.7","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virt/acrn/hsm.c"]}],"references":["https://git.kernel.org/stable/c/4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120","https://git.kernel.org/stable/c/524f29d78c9bdeb49f31f5b0376a07d2fc5cf563","https://git.kernel.org/stable/c/d7e5031fe3f161c8eb5e84db1540bc4373ed861b","https://git.kernel.org/stable/c/1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083","https://git.kernel.org/stable/c/a4c21b878f0e237f45209a324c903ea7fb05247d","https://git.kernel.org/stable/c/819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb","https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21950.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21950","state":"PUBLISHED","datePublished":"2025-04-01T15:41:10.949Z","dateUpdated":"2026-05-11T21:09:40.823Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.790Z"},"containers":{"cna":{"title":"drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl\n\nIn the \"pmcmd_ioctl\" function, three memory objects allocated by\nkmalloc are initialized by \"hcall_get_cpu_state\", which are then\ncopied to user space. The initializer is indeed implemented in\n\"acrn_hypercall2\" (arch/x86/include/asm/acrn.h). There is a risk of\ninformation leakage due to uninitialized bytes."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"524f29d78c9bdeb49f31f5b0376a07d2fc5cf563","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"d7e5031fe3f161c8eb5e84db1540bc4373ed861b","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"a4c21b878f0e237f45209a324c903ea7fb05247d","versionType":"git"},{"version":"3d679d5aec648f50e645702929890b9611998a0b","status":"affected","lessThan":"819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virt/acrn/hsm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.131","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.83","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.19","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.7","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virt/acrn/hsm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120"},{"url":"https://git.kernel.org/stable/c/524f29d78c9bdeb49f31f5b0376a07d2fc5cf563"},{"url":"https://git.kernel.org/stable/c/d7e5031fe3f161c8eb5e84db1540bc4373ed861b"},{"url":"https://git.kernel.org/stable/c/1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083"},{"url":"https://git.kernel.org/stable/c/a4c21b878f0e237f45209a324c903ea7fb05247d"},{"url":"https://git.kernel.org/stable/c/819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:09:40.823Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.179"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.1.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.6.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.12.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.13.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T19:39:51.532Z"}}]}}}