CVE-2026-64221

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The vulnerable path is reachable through local SPI-memory reads, including read(2) on an accessible file in a TI QSPI-backed JFFS2 or UBIFS filesystem.\nAC:L - Once memory pressure causes the coherent-buffer allocation failure, ordinary flash reads deterministically reuse the released channel without requiring a race or uncontrollable heap layout.\nPR:L - An ordinary unprivileged user can trigger flash I/O by reading a permitted file on a mounted QSPI-backed filesystem, with no capability check in the read path.\nUI:N - The attacker directly initiates the read and requires no action from another user.\nS:U - The resulting kernel and DMA corruption remains within the host kernel's security authority and does not inherently cross a VM or IOMMU boundary.\nC:H - Reuse of the released DMA channel can transfer data from unintended physical addresses into kernel buffers, enabling serious kernel-memory disclosure.\nI:H - Stale DMA submissions or a second channel release can corrupt DMA state, interfere with a reassigned client, and plausibly provide memory-corruption or code-execution primitives.\nA:H - Reusing or releasing the stale channel can cause an oops, panic, DMA timeout, or loss of access to a critical flash-backed filesystem."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/spi/spi-ti-qspi.c"], "versions": [{"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "9c6f306a8140962c7284197db54b96fdb5f468d6", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "d6f422b122922d1abee907d673bcc990e5f3672d", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "f2dc841d7dc9063fe9b47ced869b1271e55052ae", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "1cd927002120678bd5d23c760246639caa53040e", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "d7a076fb596c7b408ed6df74793a597990a6d860", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "178b9b570c0f75fa7e691490520328b20d19138e", "status": "affected", "versionType": "git"}, {"version": "c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83", "lessThan": "ea6ec3343e05f7937a53eb6d7617b3abdb4abc19", "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/spi/spi-ti-qspi.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "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": "4.12", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6"}, {"url": "https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6"}, {"url": "https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d"}, {"url": "https://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae"}, {"url": "https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e"}, {"url": "https://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860"}, {"url": "https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e"}, {"url": "https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19"}], "title": "spi: ti-qspi: fix use-after-free after DMA setup failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

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fix use-after-free after DMA setup failure\n\nThe driver falls back to PIO mode if DMA setup fails during probe.\n\nMake sure to clear the DMA channel pointer also if buffer allocation\nfails to avoid passing a pointer to the released channel to the DMA\nengine (or trying to free the channel a second time on late probe errors\nor driver unbind).\n\nThis issue was flagged by Sashiko when reviewing a devres allocation\nconversion patch."}], "id": "CVE-2026-64221", "lastModified": "2026-08-11T18:25:02.363", "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": "2026-07-24T16:16:49.923", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": 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{"bugzilla": {"description": "kernel: spi: ti-qspi: fix use-after-free after DMA setup failure", "id": "2506812", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506812"}, "csaw": false, "cwe": "CWE-825", "details": ["No description is available for this CVE."], "name": "CVE-2026-64221", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64221\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64221\nhttps://lore.kernel.org/linux-cve-announce/2026072416-CVE-2026-64221-299d@gregkh/T"]}

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