{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68212","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-16T13:41:40.256Z","datePublished":"2025-12-16T13:57:08.327Z","dateUpdated":"2026-08-05T12:10:14.921Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:10:14.921Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: Fix uninitialized 'offp' in statmount_string()\n\nIn statmount_string(), most flags assign an output offset pointer (offp)\nwhich is later updated with the string offset. However, the\nSTATMOUNT_MNT_UIDMAP and STATMOUNT_MNT_GIDMAP cases directly set the\nstruct fields instead of using offp. This leaves offp uninitialized,\nleading to a possible uninitialized dereference when *offp is updated.\n\nFix it by assigning offp for UIDMAP and GIDMAP as well, keeping the code\npath consistent."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerability is reached through the local statmount() syscall by requesting UID or GID mappings for an idmapped mount.\nAC:L - No race or uncontrollable condition is required; an attacker can reliably issue the request against a visible idmapped mount with a resolvable mapping.\nPR:L - No capability is required for a mount reachable beneath the caller's root, and an unprivileged user can access or create suitable idmapped mounts through user namespaces.\nUI:N - Exploitation requires only attacker-controlled syscalls and no action by another user.\nS:U - The corruption affects the host kernel within the same operating-system security authority, so ordinary privilege escalation does not change scope.\nC:H - The uninitialized write can partially corrupt seq.buf before it is used as a copy_to_user() source, creating a plausible kernel-memory disclosure primitive.\nI:H - The four-byte kernel write corrupts live pointers such as root.mnt or seq.buf, which are subsequently passed to mntput() or kvfree(), enabling further memory corruption and potential code execution.\nA:H - The malformed pointer is subsequently dereferenced or freed, producing a repeatable kernel oops and potentially a system-wide panic."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/namespace.c"],"versions":[{"version":"37c4a9590e1efcae7749682239fc22a330d2d325","lessThan":"acfde9400e611c8d2668f1c70053c4a1d6ecfc36","status":"affected","versionType":"git"},{"version":"37c4a9590e1efcae7749682239fc22a330d2d325","lessThan":"0778ac7df5137d5041783fadfc201f8fd55a1d9b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/namespace.c"],"versions":[{"version":"6.15","status":"affected"},{"version":"0","lessThan":"6.15","status":"unaffected","versionType":"semver"},{"version":"6.17.10","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","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":"6.15","versionEndExcluding":"6.17.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/acfde9400e611c8d2668f1c70053c4a1d6ecfc36"},{"url":"https://git.kernel.org/stable/c/0778ac7df5137d5041783fadfc201f8fd55a1d9b"}],"title":"fs: Fix uninitialized 'offp' in statmount_string()","x_generator":{"engine":"bippy-1.2.0"}}}}