CVE-2026-89955

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89955", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.777Z", "datePublished": "2026-09-16T10:32:39.064Z", "dateUpdated": "2026-10-30T12:33:33.417Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:33.417Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: Fix NULL deref in status_show() during queue probe\n\nWhen vfio_ap_mdev_probe_queue() creates the sysfs attribute group,\nthe queue's driver data has not yet been set. A concurrent read of\nthe 'status' attribute can therefore call dev_get_drvdata() and\nget NULL, which is then passed directly to\nvfio_ap_mdev_for_queue() where q->apqn is unconditionally\ndereferenced, causing a NULL pointer dereference.\n\nFix this by acquiring the update locks before calling\nsysfs_create_group(). The status_show() function acquires\nguests_lock before reading the driver data, so any concurrent\nread will block until after dev_set_drvdata() has been called\nand the update locks are released.\n\nAs a bonus, the APQN no longer needs to be read from the queue\nstruct after allocation \u2014 it can be read directly from apdev\nbefore allocation and stored in a local variable, which is then\nassigned to q->apqn once the allocation succeeds."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/crypto/vfio_ap_ops.c"], "versions": [{"version": "260f3ea141382386e97611e7c2029bc013088ab1", "lessThan": "10606c9af18baed75cd180b96ee695441aa15134", "status": "affected", "versionType": "git"}, {"version": "260f3ea141382386e97611e7c2029bc013088ab1", "lessThan": "31fa0a8a3c337ed2d200166d6926ab23c14f8b2e", "status": "affected", "versionType": "git"}, {"version": "260f3ea141382386e97611e7c2029bc013088ab1", "lessThan": "e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9", "status": "affected", "versionType": "git"}, {"version": "260f3ea141382386e97611e7c2029bc013088ab1", "lessThan": "69632952aca04caa71e49953b6949fc04e788e67", "status": "affected", "versionType": "git"}, {"version": "260f3ea141382386e97611e7c2029bc013088ab1", "lessThan": "7db2511fc601ca3a6e3fb1bdce02261c3c3167c3", "status": "affected", "versionType": "git"}, {"version": "260f3ea141382386e97611e7c2029bc013088ab1", "lessThan": "dd6f4ef6f8a37412909ad787c837332fb070159c", "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/crypto/vfio_ap_ops.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.0", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/10606c9af18baed75cd180b96ee695441aa15134"}, {"url": "https://git.kernel.org/stable/c/31fa0a8a3c337ed2d200166d6926ab23c14f8b2e"}, {"url": "https://git.kernel.org/stable/c/e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9"}, {"url": "https://git.kernel.org/stable/c/69632952aca04caa71e49953b6949fc04e788e67"}, {"url": "https://git.kernel.org/stable/c/7db2511fc601ca3a6e3fb1bdce02261c3c3167c3"}, {"url": "https://git.kernel.org/stable/c/dd6f4ef6f8a37412909ad787c837332fb070159c"}], "title": "s390/vfio-ap: Fix NULL deref in status_show() during queue probe", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/s390/crypto/vfio_ap_ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "10606c9af18baed75cd180b96ee695441aa15134", "status": "affected", "version": "260f3ea141382386e97611e7c2029bc013088ab1", "versionType": "git"}, {"lessThan": "31fa0a8a3c337ed2d200166d6926ab23c14f8b2e", "status": "affected", "version": "260f3ea141382386e97611e7c2029bc013088ab1", "versionType": "git"}, {"lessThan": "e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9", "status": "affected", "version": "260f3ea141382386e97611e7c2029bc013088ab1", "versionType": "git"}, {"lessThan": "69632952aca04caa71e49953b6949fc04e788e67", "status": "affected", "version": "260f3ea141382386e97611e7c2029bc013088ab1", "versionType": "git"}, {"lessThan": "7db2511fc601ca3a6e3fb1bdce02261c3c3167c3", "status": "affected", "version": "260f3ea141382386e97611e7c2029bc013088ab1", "versionType": "git"}, {"lessThan": "dd6f4ef6f8a37412909ad787c837332fb070159c", "status": "affected", "version": "260f3ea141382386e97611e7c2029bc013088ab1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/s390/crypto/vfio_ap_ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: Fix NULL deref in status_show() during queue probe\n\nWhen vfio_ap_mdev_probe_queue() creates the sysfs attribute group,\nthe queue's driver data has not yet been set. A concurrent read of\nthe 'status' attribute can therefore call dev_get_drvdata() and\nget NULL, which is then passed directly to\nvfio_ap_mdev_for_queue() where q->apqn is unconditionally\ndereferenced, causing a NULL pointer dereference.\n\nFix this by acquiring the update locks before calling\nsysfs_create_group(). The status_show() function acquires\nguests_lock before reading the driver data, so any concurrent\nread will block until after dev_set_drvdata() has been called\nand the update locks are released.\n\nAs a bonus, the APQN no longer needs to be read from the queue\nstruct after allocation \u2014 it can be read directly from apdev\nbefore allocation and stored in a local variable, which is then\nassigned to q->apqn once the allocation succeeds."}], "id": "CVE-2026-89955", "lastModified": "2026-10-30T13:20:36.663", "metrics": {}, "published": "2026-09-16T11:17:05.797", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10606c9af18baed75cd180b96ee695441aa15134"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/31fa0a8a3c337ed2d200166d6926ab23c14f8b2e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/69632952aca04caa71e49953b6949fc04e788e67"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7db2511fc601ca3a6e3fb1bdce02261c3c3167c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd6f4ef6f8a37412909ad787c837332fb070159c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[260f3ea141382386e97611e7c2029bc013088ab1,31fa0a8a3c337ed2d200166d6926ab23c14f8b2e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[260f3ea141382386e97611e7c2029bc013088ab1,e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[260f3ea141382386e97611e7c2029bc013088ab1,69632952aca04caa71e49953b6949fc04e788e67)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[260f3ea141382386e97611e7c2029bc013088ab1,7db2511fc601ca3a6e3fb1bdce02261c3c3167c3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[260f3ea141382386e97611e7c2029bc013088ab1,dd6f4ef6f8a37412909ad787c837332fb070159c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T07:30:05.849924+00:00", "updated": "2026-09-18T08:30:06.431088+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}