{"id":"CVE-2026-45962","state":"PUBLISHED","title":"ublk: Validate SQE128 flag before accessing the cmd","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: Validate SQE128 flag before accessing the cmd\n\nublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before\nIO_URING_F_SQE128 flag check. This could cause out of boundary memory\naccess.\n\nMove the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return\n-EINVAL immediately if the flag is not set.","publishedAt":"2026-05-27T12:18:19.070Z","updatedAt":"2026-05-27T12:18:19.070Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"4b4dff498f46e9802f71bc84258bf73065f51c6a","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"31cac6acf77ece488f29fb8f79589d9298e969c8","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"dbe8e81a2ec608f87f79a34f6444cd62f6a243bb","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"f75a5555e0049e7857eae25b60aee98b80e287ec","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"17d33ba7291100008360b5a354962db37ad80684","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"da7e4b75e50c087d2031a92f6646eb90f7045a67","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/ublk_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/ublk_drv.c"]}],"references":["https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a","https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8","https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb","https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec","https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684","https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45962.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45962","state":"PUBLISHED","datePublished":"2026-05-27T12:18:19.070Z","dateUpdated":"2026-05-27T12:18:19.070Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.089Z"},"containers":{"cna":{"title":"ublk: Validate SQE128 flag before accessing the cmd","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: Validate SQE128 flag before accessing the cmd\n\nublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before\nIO_URING_F_SQE128 flag check. This could cause out of boundary memory\naccess.\n\nMove the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return\n-EINVAL immediately if the flag is not set."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"4b4dff498f46e9802f71bc84258bf73065f51c6a","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"31cac6acf77ece488f29fb8f79589d9298e969c8","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"dbe8e81a2ec608f87f79a34f6444cd62f6a243bb","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"f75a5555e0049e7857eae25b60aee98b80e287ec","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"17d33ba7291100008360b5a354962db37ad80684","versionType":"git"},{"version":"71f28f3136aff5890cd56de78abc673f8393cad9","status":"affected","lessThan":"da7e4b75e50c087d2031a92f6646eb90f7045a67","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/ublk_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/ublk_drv.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a"},{"url":"https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8"},{"url":"https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb"},{"url":"https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec"},{"url":"https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684"},{"url":"https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:18:19.070Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}