{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52930","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.369Z","datePublished":"2026-06-24T07:14:22.704Z","dateUpdated":"2026-11-06T16:23:50.076Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-24T07:14:22.704Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipc/shm: serialize orphan cleanup with shm_nattch updates\n\nshm_destroy_orphaned() walks the shm idr under shm_ids(ns).rwsem, but that\ndoes not serialize all fields tested by shm_may_destroy().  In particular,\nshm_nattch is updated while holding shm_perm.lock, and attach paths can do\nthat without holding the rwsem.\n\nDo not decide that an orphaned segment is unused before taking the object\nlock.  Move the shm_may_destroy() check under shm_perm.lock, matching the\nother destroy paths, and unlock the segment when it no longer qualifies\nfor removal."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["ipc/shm.c"],"versions":[{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"b1e9aef48e4d8a0c1b54fb913077b0824ed7d650","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"92cda2593cf2ed25b0e9d78e5e6d8303bba1a064","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"1f0d01e35dbb228084d5187212e32c91a30dcbeb","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"6560be3f6a5bb84f006f184f0c966747bb58e1a3","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"b5107b4ce3ad45fcf369ee2058c8910620f4b5a8","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"db752ebfdaf2c7f27cd9690ef48b616af068319c","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"030bbc857bd51d4b25a90d931d3f8775ef22823a","status":"affected","versionType":"git"},{"version":"4c677e2eefdba9c5bfc4474e2e91b26ae8458a1d","lessThan":"2e5c6f4fd4001562781e99bbfc7f1f0127187542","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["ipc/shm.c"],"versions":[{"version":"3.1","status":"affected"},{"version":"0","lessThan":"3.1","status":"unaffected","versionType":"semver"},{"version":"5.10.259","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.210","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.94","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.36","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.13","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","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":"3.1","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b1e9aef48e4d8a0c1b54fb913077b0824ed7d650"},{"url":"https://git.kernel.org/stable/c/92cda2593cf2ed25b0e9d78e5e6d8303bba1a064"},{"url":"https://git.kernel.org/stable/c/1f0d01e35dbb228084d5187212e32c91a30dcbeb"},{"url":"https://git.kernel.org/stable/c/6560be3f6a5bb84f006f184f0c966747bb58e1a3"},{"url":"https://git.kernel.org/stable/c/b5107b4ce3ad45fcf369ee2058c8910620f4b5a8"},{"url":"https://git.kernel.org/stable/c/db752ebfdaf2c7f27cd9690ef48b616af068319c"},{"url":"https://git.kernel.org/stable/c/030bbc857bd51d4b25a90d931d3f8775ef22823a"},{"url":"https://git.kernel.org/stable/c/2e5c6f4fd4001562781e99bbfc7f1f0127187542"}],"title":"ipc/shm: 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