{"id":"CVE-2026-74514","state":"PUBLISHED","title":"KVM: s390: pci: Fix memory accounting for pinned/unpinned pages","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Fix memory accounting for pinned/unpinned pages\n\nThe account_mem() and unaccount_mem() functions call get_uid() which\nincrements the reference count of struct user_struct on every invocation.\nBut we don't decrement the count by calling free_uid(). It also\naccounted/unaccounted the pages against the current->mm. But its possible\nthe unaccount_mem() can be called from a different process context than the\none that originally pinned the pages.\n\nLet's fix this by storing the pinning process user_struct and mm_struct\nwhen accounting for pinned pages, and subsequently free these resources\nwhen the pages are unpinned.\n\n[borntraeger@linux.ibm.com: Fixed whitespace]","publishedAt":"2026-08-15T12:27:34.947Z","updatedAt":"2026-08-23T12:47:32.122Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"dc7465a364104526c56b922c9de9dfcc08a7d5f7","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"47cfd75d9df7c8f425b0d769328fe43a8a8e606e","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"70871b121f81d08879363cb1238a4c85c5c2800c","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"e3f732e086e438c52c7400bd2734bb166aa4752c","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"36f6999ecde3976731a8bfc0b8e667da6f593069","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kvm/pci.c","arch/s390/kvm/pci.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.184","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.152","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.104","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kvm/pci.c","arch/s390/kvm/pci.h"]}],"references":["https://git.kernel.org/stable/c/ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e","https://git.kernel.org/stable/c/dc7465a364104526c56b922c9de9dfcc08a7d5f7","https://git.kernel.org/stable/c/47cfd75d9df7c8f425b0d769328fe43a8a8e606e","https://git.kernel.org/stable/c/70871b121f81d08879363cb1238a4c85c5c2800c","https://git.kernel.org/stable/c/e3f732e086e438c52c7400bd2734bb166aa4752c","https://git.kernel.org/stable/c/36f6999ecde3976731a8bfc0b8e667da6f593069"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74514.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74514","state":"PUBLISHED","datePublished":"2026-08-15T12:27:34.947Z","dateUpdated":"2026-08-23T12:47:32.122Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.909Z"},"containers":{"cna":{"title":"KVM: s390: pci: Fix memory accounting for pinned/unpinned pages","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Fix memory accounting for pinned/unpinned pages\n\nThe account_mem() and unaccount_mem() functions call get_uid() which\nincrements the reference count of struct user_struct on every invocation.\nBut we don't decrement the count by calling free_uid(). It also\naccounted/unaccounted the pages against the current->mm. But its possible\nthe unaccount_mem() can be called from a different process context than the\none that originally pinned the pages.\n\nLet's fix this by storing the pinning process user_struct and mm_struct\nwhen accounting for pinned pages, and subsequently free these resources\nwhen the pages are unpinned.\n\n[borntraeger@linux.ibm.com: Fixed whitespace]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"dc7465a364104526c56b922c9de9dfcc08a7d5f7","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"47cfd75d9df7c8f425b0d769328fe43a8a8e606e","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"70871b121f81d08879363cb1238a4c85c5c2800c","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"e3f732e086e438c52c7400bd2734bb166aa4752c","versionType":"git"},{"version":"3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc","status":"affected","lessThan":"36f6999ecde3976731a8bfc0b8e667da6f593069","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kvm/pci.c","arch/s390/kvm/pci.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.184","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.152","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.104","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kvm/pci.c","arch/s390/kvm/pci.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e"},{"url":"https://git.kernel.org/stable/c/dc7465a364104526c56b922c9de9dfcc08a7d5f7"},{"url":"https://git.kernel.org/stable/c/47cfd75d9df7c8f425b0d769328fe43a8a8e606e"},{"url":"https://git.kernel.org/stable/c/70871b121f81d08879363cb1238a4c85c5c2800c"},{"url":"https://git.kernel.org/stable/c/e3f732e086e438c52c7400bd2734bb166aa4752c"},{"url":"https://git.kernel.org/stable/c/36f6999ecde3976731a8bfc0b8e667da6f593069"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-23T12:47:32.122Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}