{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64053", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.029Z", "datePublished": "2026-07-19T15:39:35.854Z", "dateUpdated": "2026-07-19T15:39:35.854Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:39:35.854Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: don't overwrite bip_vcnt in bio_integrity_copy_user()\n\nbio_integrity_add_page() already sets bip_vcnt to 1 for the bounce\nsegment. Overwriting it with nr_vecs breaks bip_vcnt <= bip_max_vcnt\non WRITE (bip_max_vcnt is 1), so the gap-merge checks in block/blk.h\nread past the bip_vec[] flex array. On READ the read is in bounds\nbut lands on a saved user bvec instead of the bounce.\n\nThe line was added for split propagation, but bio_integrity_clone()\ndoesn't copy bip_vcnt and BIP_CLONE_FLAGS excludes BIP_COPY_USER."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/bio-integrity.c"], "versions": [{"version": "3991657ae7074c3c497bf095093178bed37ea1b4", "lessThan": "d18160c9525c63c203656fefd847e94b538cd4a4", "status": "affected", "versionType": "git"}, {"version": "3991657ae7074c3c497bf095093178bed37ea1b4", "lessThan": "0d48654af4d1390c888389206cc13b51b82c30e6", "status": "affected", "versionType": "git"}, {"version": "3991657ae7074c3c497bf095093178bed37ea1b4", "lessThan": "066be1439593a381b1a29663becfcfe0c92363e7", "status": "affected", "versionType": "git"}, {"version": "3991657ae7074c3c497bf095093178bed37ea1b4", "lessThan": "637ad3a56a3b889527d1dacea6fea2a8bd648140", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/bio-integrity.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "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": "6.11", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d18160c9525c63c203656fefd847e94b538cd4a4"}, {"url": "https://git.kernel.org/stable/c/0d48654af4d1390c888389206cc13b51b82c30e6"}, {"url": "https://git.kernel.org/stable/c/066be1439593a381b1a29663becfcfe0c92363e7"}, {"url": "https://git.kernel.org/stable/c/637ad3a56a3b889527d1dacea6fea2a8bd648140"}], "title": "block: don't overwrite bip_vcnt in bio_integrity_copy_user()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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