{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45981", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.090Z", "datePublished": "2026-05-27T12:18:39.923Z", "dateUpdated": "2026-05-27T12:18:39.923Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:18:39.923Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix device lifecycle handling in css_alloc_subchannel()\n\n`css_alloc_subchannel()` calls `device_initialize()` before setting up\nthe DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails,\nthe error path frees the subchannel structure directly, bypassing\nthe device model reference counting.\n\nOnce `device_initialize()` has been called, the embedded struct device\nmust be released via `put_device()`, allowing the release callback to\nfree the container structure.\n\nFix the error path by dropping the initial device reference with\n`put_device()` instead of calling `kfree()` directly.\n\nThis ensures correct device lifetime handling and avoids potential\nuse-after-free or double-free issues."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/cio/css.c"], "versions": [{"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "2b2ad7ad4a28ffdb9f94e6d979b88a5b12b71681", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "b1d4e6fb241672850296956c4d782a69363a3807", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "fd295a75d828c11acfcc6869c2a12cdaaf9b7722", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "abb6e07f46a740cda4f07d1b561ae4eaa7a1df42", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "6715560527e343a387e4a0d2e6c401748e89fa55", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603", "status": "affected", "versionType": "git"}, {"version": "e5dcf0025d7af58f525590ac86ac27cb44714e8d", "lessThan": "f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/cio/css.c"], "versions": [{"version": "3.10", "status": "affected"}, {"version": "0", "lessThan": "3.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "3.10", "versionEndExcluding": "5.10.252"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.15.202"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424"}, {"url": "https://git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55"}, {"url": "https://git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603"}, {"url": "https://git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7"}], "title": "s390/cio: Fix device lifecycle handling in css_alloc_subchannel()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix device lifecycle handling in css_alloc_subchannel()\n\n`css_alloc_subchannel()` calls `device_initialize()` before setting up\nthe DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails,\nthe error path frees the subchannel structure directly, bypassing\nthe device model reference counting.\n\nOnce `device_initialize()` has been called, the embedded struct device\nmust be released via `put_device()`, allowing the release callback to\nfree the container structure.\n\nFix the error path by dropping the initial device reference with\n`put_device()` instead of calling `kfree()` directly.\n\nThis ensures correct device lifetime handling and avoids potential\nuse-after-free or double-free issues."}], "id": "CVE-2026-45981", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:15.233", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b2ad7ad4a28ffdb9f94e6d979b88a5b12b71681"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abb6e07f46a740cda4f07d1b561ae4eaa7a1df42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b1d4e6fb241672850296956c4d782a69363a3807"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd295a75d828c11acfcc6869c2a12cdaaf9b7722"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"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-911", "details": ["A flaw was found in the Linux kernel, specifically within the s390/cio component. This vulnerability stems from incorrect device lifecycle management during subchannel allocation. This could allow an attacker to trigger use-after-free or double-free conditions, potentially leading to system instability or a denial of service (DoS), which disrupts normal operations."], "name": "CVE-2026-45981", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45981\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45981\nhttps://lore.kernel.org/linux-cve-announce/2026052738-CVE-2026-45981-962a@gregkh/T"], "threat_severity": "Moderate"}