{"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": "2026-06-24T07:14:22.704Z"}, "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: serialize orphan cleanup with shm_nattch updates", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: ipc/shm: serialize orphan cleanup with shm_nattch updates", "id": "2492116", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492116"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel's inter-process communication (IPC) shared memory (shm) component. A synchronization issue exists where orphaned shared memory segments might be incorrectly destroyed while still in use due to a lack of serialization between cleanup and attachment updates. This could lead to system instability or a denial of service."], "name": "CVE-2026-52930", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-52930\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-52930\nhttps://lore.kernel.org/linux-cve-announce/2026062432-CVE-2026-52930-9f00@gregkh/T"], "threat_severity": "Moderate"}