{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93262", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.097Z", "datePublished": "2026-09-24T15:52:01.886Z", "dateUpdated": "2026-09-25T05:09:54.351Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T05:09:54.351Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5-ppl: fix use-after-free in ppl_do_flush()\n\nThe loop in ppl_do_flush() continues iterating after calling\nppl_io_unit_finished(), touching io->pending_flushes and leading to a\nuse-after-free.\n\nAdd a break statement to stop the loop once io is freed."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The patched ppl_do_flush() runs from ppl_stripe_write_finished() after RAID5 stripe data+parity I/O completes. Those writes enter via md_submit_bio() -> raid5_make_request() from local write(2) to a filesystem or /dev/md*; ppl_submit_iounit() only sets disk_flush_bitmap from local stripe R5_Wantwrite/wb_cache_on state, not from a network protocol message.\nAC:L - Writes the attacker issues are logged by ppl_write_stripe()/ppl_log_stripe() and ppl_submit_iounit() sets disk_flush_bitmap for child_logs[i].wb_cache_on members. When pending_stripes hits 0, ppl_stripe_write_finished() calls ppl_do_flush(); the remainder loop's missing break after ppl_io_unit_finished() is a logic bug on that path, not a second-actor race or a disk-fault precondition.\nPR:L - md_submit_bio() and raid5_make_request() have no capability check; md_ioctl()'s capable(CAP_SYS_ADMIN) applies only to array-management ioctls, not I/O. An unprivileged user who can write a filesystem on the RAID5+PPL array (or /dev/md* with disk-group write access) reaches ppl_do_flush() without init-namespace root.\nUI:N - The attacker triggers ppl_do_flush() through their own writes: raid5 handle_stripe()/handle_stripe_clean_event() calls ppl_stripe_write_finished() on I/O they submitted. No victim action such as mounting an image or plugging a device is required.\nS:U - ppl_io_unit_finished() mempool_free()s the ppl_io_unit from ppl_conf->io_pool in the host md/raid5 kernel. The later dangling atomic_dec_and_test(&io->pending_flushes) in ppl_do_flush() stays in that kernel's authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - ppl_io_unit_finished() returns the ppl_io_unit to io_pool via mempool_free(); ppl_do_flush()'s remainder loop then does atomic_dec_and_test(&io->pending_flushes) on that freed kmem_cache object. A UAF of the recycled io_unit header is a kernel read primitive against adjacent/reconstituted pool memory.\nI:H - The same dangling io is a writeable ppl_io_unit: atomic_dec_and_test() mutates pending_flushes on a recycled object, and another true dec_and_test would call ppl_io_unit_finished() again (list_del/mempool_free of a live unit). That is a kernel write/double-free primitive on the PPL io_unit cache.\nA:H - Use-after-free of the mempool ppl_io_unit in ppl_do_flush() after ppl_io_unit_finished() can oops on the stale pending_flushes access or corrupt list_del() pointers in a second finish, panicking the host."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/raid5-ppl.c"], "versions": [{"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "cf01f9413565e86673baf927291a088b6975692b", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "e7505842f1329ece90cb9ea0db87772aeca44052", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "b5123bf667ac29ddd8106f9ca7cc01316513ae66", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "e77c80670f2c2bf491da9b173931e1da4677c23a", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "8914c3d40870f16429a326e97e4016bedc6ede4c", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "455b56209f9615c3902dcc398dd867abb5ade3ab", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "fcf21df7d3c50c8ebeb0757df5d21b02dcae4218", "status": "affected", "versionType": "git"}, {"version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "lessThan": "371f7a1b392edc8b7cf449cc7713179b588f2d0e", "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/md/raid5-ppl.c"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "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": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "4.16", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cf01f9413565e86673baf927291a088b6975692b"}, {"url": "https://git.kernel.org/stable/c/e7505842f1329ece90cb9ea0db87772aeca44052"}, {"url": "https://git.kernel.org/stable/c/b5123bf667ac29ddd8106f9ca7cc01316513ae66"}, {"url": "https://git.kernel.org/stable/c/e77c80670f2c2bf491da9b173931e1da4677c23a"}, {"url": "https://git.kernel.org/stable/c/8914c3d40870f16429a326e97e4016bedc6ede4c"}, {"url": "https://git.kernel.org/stable/c/455b56209f9615c3902dcc398dd867abb5ade3ab"}, {"url": "https://git.kernel.org/stable/c/fcf21df7d3c50c8ebeb0757df5d21b02dcae4218"}, {"url": "https://git.kernel.org/stable/c/371f7a1b392edc8b7cf449cc7713179b588f2d0e"}], "title": "md/raid5-ppl: fix use-after-free in ppl_do_flush()", "x_generator": 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/md/raid5-ppl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cf01f9413565e86673baf927291a088b6975692b", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "e7505842f1329ece90cb9ea0db87772aeca44052", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "b5123bf667ac29ddd8106f9ca7cc01316513ae66", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "e77c80670f2c2bf491da9b173931e1da4677c23a", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "8914c3d40870f16429a326e97e4016bedc6ede4c", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "455b56209f9615c3902dcc398dd867abb5ade3ab", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "fcf21df7d3c50c8ebeb0757df5d21b02dcae4218", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}, {"lessThan": "371f7a1b392edc8b7cf449cc7713179b588f2d0e", "status": "affected", "version": "1532d9e87e8b2377f12929f9e40724d5fbe6ecc5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/md/raid5-ppl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"lessThan": "4.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "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": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nmd/raid5-ppl: fix use-after-free in ppl_do_flush()\n\nThe loop in ppl_do_flush() continues iterating after calling\nppl_io_unit_finished(), touching io->pending_flushes and leading to a\nuse-after-free.\n\nAdd a break statement to stop the loop once io is freed."}], "id": "CVE-2026-93262", "lastModified": "2026-09-25T05:17:01.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T16:17:22.927", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/371f7a1b392edc8b7cf449cc7713179b588f2d0e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/455b56209f9615c3902dcc398dd867abb5ade3ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8914c3d40870f16429a326e97e4016bedc6ede4c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5123bf667ac29ddd8106f9ca7cc01316513ae66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf01f9413565e86673baf927291a088b6975692b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e7505842f1329ece90cb9ea0db87772aeca44052"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e77c80670f2c2bf491da9b173931e1da4677c23a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fcf21df7d3c50c8ebeb0757df5d21b02dcae4218"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,cf01f9413565e86673baf927291a088b6975692b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,e7505842f1329ece90cb9ea0db87772aeca44052)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,b5123bf667ac29ddd8106f9ca7cc01316513ae66)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,e77c80670f2c2bf491da9b173931e1da4677c23a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,8914c3d40870f16429a326e97e4016bedc6ede4c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,455b56209f9615c3902dcc398dd867abb5ade3ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,fcf21df7d3c50c8ebeb0757df5d21b02dcae4218)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1532d9e87e8b2377f12929f9e40724d5fbe6ecc5,371f7a1b392edc8b7cf449cc7713179b588f2d0e)"}}], "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": "4.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"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": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"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": "2026-09-25T05:15:17.156385+00:00", "updated": "2026-09-25T05:15:17.156502+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}