{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99156", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.397Z", "datePublished": "2026-10-28T10:35:10.493Z", "dateUpdated": "2026-10-28T10:35:10.493Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-28T10:35:10.493Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: st: Fix use-after-free race between st_remove() and st_open()\n\nst_remove() drops the probe reference on the scsi_tape with kref_put()\nand only afterwards removes its index from st_index_idr. If that was the\nlast reference, scsi_tape_release() frees the structure while it is\nstill published in the idr.\n\nscsi_tape_get(), called from st_open(), looks up the tape in\nst_index_idr and takes a reference under st_ref_mutex and\nst_index_lock. remove_cdevs() does not wait for opens that are already\npast chrdev_open(), so an open that is blocked on st_ref_mutex while\nst_remove() holds it can take the mutex as soon as st_remove() drops it,\nfind the freed tpnt in the idr and call kref_get() on it:\n\n BUG: KASAN: slab-use-after-free in st_open\n Write of size 4 ...\n st_open (drivers/scsi/st.c:254 drivers/scsi/st.c:1291)\n chrdev_open\n ...\n Freed by task ...:\n kfree\n st_remove (drivers/scsi/st.c:4512)\n\nRemove the index from the idr before dropping the reference, all under\nst_ref_mutex. A concurrent scsi_tape_get() now either runs first and\nholds a valid reference that keeps the tape alive, or runs afterwards\nand finds nothing, so st_open() fails with -ENXIO.\n\nThis restores the ordering st_remove() had before the conversion to\nst_index_idr, where the tape was unpublished from scsi_tapes[] before\nthe final kref_put()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/scsi/st.c"], "versions": [{"version": "6c648d95a6af4a79241a916871df17c84c68ea20", "lessThan": "a1647b653549ff29f0422a63eabf329b842f3822", "status": "affected", "versionType": "git"}, {"version": "6c648d95a6af4a79241a916871df17c84c68ea20", "lessThan": "18a0e3733ce38718688e813e5e2d1106bd4830e5", "status": "affected", "versionType": "git"}, {"version": "6c648d95a6af4a79241a916871df17c84c68ea20", "lessThan": "71caf7f84bd62a4bf91cc95abd2de690afb8d15f", "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/scsi/st.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.13", "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": "3.7", "versionEndExcluding": "6.18.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.2.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a1647b653549ff29f0422a63eabf329b842f3822"}, {"url": "https://git.kernel.org/stable/c/18a0e3733ce38718688e813e5e2d1106bd4830e5"}, {"url": "https://git.kernel.org/stable/c/71caf7f84bd62a4bf91cc95abd2de690afb8d15f"}], "title": "scsi: st: Fix use-after-free race between st_remove() and st_open()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/scsi/st.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a1647b653549ff29f0422a63eabf329b842f3822", "status": "affected", "version": "6c648d95a6af4a79241a916871df17c84c68ea20", "versionType": "git"}, {"lessThan": "18a0e3733ce38718688e813e5e2d1106bd4830e5", "status": "affected", "version": "6c648d95a6af4a79241a916871df17c84c68ea20", "versionType": "git"}, {"lessThan": "71caf7f84bd62a4bf91cc95abd2de690afb8d15f", "status": "affected", "version": "6c648d95a6af4a79241a916871df17c84c68ea20", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/scsi/st.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.7"}, {"lessThan": "3.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.59", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.13", "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\nscsi: st: Fix use-after-free race between st_remove() and st_open()\n\nst_remove() drops the probe reference on the scsi_tape with kref_put()\nand only afterwards removes its index from st_index_idr. If that was the\nlast reference, scsi_tape_release() frees the structure while it is\nstill published in the idr.\n\nscsi_tape_get(), called from st_open(), looks up the tape in\nst_index_idr and takes a reference under st_ref_mutex and\nst_index_lock. remove_cdevs() does not wait for opens that are already\npast chrdev_open(), so an open that is blocked on st_ref_mutex while\nst_remove() holds it can take the mutex as soon as st_remove() drops it,\nfind the freed tpnt in the idr and call kref_get() on it:\n\n BUG: KASAN: slab-use-after-free in st_open\n Write of size 4 ...\n st_open (drivers/scsi/st.c:254 drivers/scsi/st.c:1291)\n chrdev_open\n ...\n Freed by task ...:\n kfree\n st_remove (drivers/scsi/st.c:4512)\n\nRemove the index from the idr before dropping the reference, all under\nst_ref_mutex. A concurrent scsi_tape_get() now either runs first and\nholds a valid reference that keeps the tape alive, or runs afterwards\nand finds nothing, so st_open() fails with -ENXIO.\n\nThis restores the ordering st_remove() had before the conversion to\nst_index_idr, where the tape was unpublished from scsi_tapes[] before\nthe final kref_put()."}], "id": "CVE-2026-99156", "lastModified": "2026-10-28T11:17:35.797", "metrics": {}, "published": "2026-10-28T11:17:35.797", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18a0e3733ce38718688e813e5e2d1106bd4830e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/71caf7f84bd62a4bf91cc95abd2de690afb8d15f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1647b653549ff29f0422a63eabf329b842f3822"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c648d95a6af4a79241a916871df17c84c68ea20,a1647b653549ff29f0422a63eabf329b842f3822)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c648d95a6af4a79241a916871df17c84c68ea20,18a0e3733ce38718688e813e5e2d1106bd4830e5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c648d95a6af4a79241a916871df17c84c68ea20,71caf7f84bd62a4bf91cc95abd2de690afb8d15f)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.7,3.7]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.59,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.13,7.3.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c648d95a6af4a79241a916871df17c84c68ea20,a1647b653549ff29f0422a63eabf329b842f3822)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c648d95a6af4a79241a916871df17c84c68ea20,18a0e3733ce38718688e813e5e2d1106bd4830e5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c648d95a6af4a79241a916871df17c84c68ea20,71caf7f84bd62a4bf91cc95abd2de690afb8d15f)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"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": "[3.7,3.7]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.59,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.13,7.3.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-28T12:45:16.180734+00:00", "updated": "2026-10-28T13:15:17.725608+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}