{"id":"CVE-2026-74466","state":"PUBLISHED","title":"s390/zcrypt: Close speculative mem read possibility","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Close speculative mem read possibility\n\nThe domain value is extracted from a given CCA or EP11 ioctl struct\nwhen a CPRB is about to be sent. Thus this is a user controlled value.\nUnder some special conditions (custom device node used, administrative\nload) this value is used as an array index after bounds checking, but\nwithout speculation barrier.\n\nAdd the missing array_index_nospec() call to prevent speculative\nexecution where this domain value is used.","publishedAt":"2026-08-15T12:27:05.020Z","updatedAt":"2026-10-30T12:30:05.677Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"55ac533c568a5dcaa41cd26d6e089f9dff2a7c22","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"dd1a334523ba533cba63caf593a7329d8e0e5e6e","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"59adeedebf02aa1c203de1d2b67ec45bfab7a3c6","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"82b62eda68abfb7a33ac40f24b8c4128c2891148","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/s390/crypto/zcrypt_api.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/s390/crypto/zcrypt_api.c"]}],"references":["https://git.kernel.org/stable/c/55ac533c568a5dcaa41cd26d6e089f9dff2a7c22","https://git.kernel.org/stable/c/dd1a334523ba533cba63caf593a7329d8e0e5e6e","https://git.kernel.org/stable/c/d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f","https://git.kernel.org/stable/c/59adeedebf02aa1c203de1d2b67ec45bfab7a3c6","https://git.kernel.org/stable/c/82b62eda68abfb7a33ac40f24b8c4128c2891148","https://git.kernel.org/stable/c/e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb"],"weaknesses":[],"ingestedAt":"2026-10-30T12:48:04.825Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74466.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74466","state":"PUBLISHED","datePublished":"2026-08-15T12:27:05.020Z","dateUpdated":"2026-10-30T12:30:05.677Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.902Z"},"containers":{"cna":{"title":"s390/zcrypt: Close speculative mem read possibility","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Close speculative mem read possibility\n\nThe domain value is extracted from a given CCA or EP11 ioctl struct\nwhen a CPRB is about to be sent. Thus this is a user controlled value.\nUnder some special conditions (custom device node used, administrative\nload) this value is used as an array index after bounds checking, but\nwithout speculation barrier.\n\nAdd the missing array_index_nospec() call to prevent speculative\nexecution where this domain value is used."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"55ac533c568a5dcaa41cd26d6e089f9dff2a7c22","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"dd1a334523ba533cba63caf593a7329d8e0e5e6e","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"59adeedebf02aa1c203de1d2b67ec45bfab7a3c6","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"82b62eda68abfb7a33ac40f24b8c4128c2891148","versionType":"git"},{"version":"cfd68b33094e1a92249850ff3c3c92ae9112a541","status":"affected","lessThan":"e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/s390/crypto/zcrypt_api.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/s390/crypto/zcrypt_api.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/55ac533c568a5dcaa41cd26d6e089f9dff2a7c22"},{"url":"https://git.kernel.org/stable/c/dd1a334523ba533cba63caf593a7329d8e0e5e6e"},{"url":"https://git.kernel.org/stable/c/d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f"},{"url":"https://git.kernel.org/stable/c/59adeedebf02aa1c203de1d2b67ec45bfab7a3c6"},{"url":"https://git.kernel.org/stable/c/82b62eda68abfb7a33ac40f24b8c4128c2891148"},{"url":"https://git.kernel.org/stable/c/e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:30:05.677Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}