{"id":"CVE-2026-68418","state":"PUBLISHED","title":"RDMA/irdma: Prevent user-triggered null deref on QP create","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Prevent user-triggered null deref on QP create\n\nPreviously, the user QP creation path would only attempt to\npopulate iwqp->iwpbl if the user-provided req.user_wqe_bufs\nfield was non-zero. The problem is that iwqp->iwpbl is\nunconditionally dereferenced later on in irdma_setup_virt_qp.\n\nWhile there was a check for iwqp->iwpbl != NULL, this check\nwould only occur if req.user_wqe_bufs was non-zero. The end\nresult is that a user could send a zero user_wqe_bufs value\nand trigger a null ptr deref.\n\nFix this by unconditionally calling irdma_get_pbl and bailing\nif it fails, similar to the CQ and SRQ paths.","publishedAt":"2026-08-10T12:04:38.930Z","updatedAt":"2026-10-30T12:28:34.156Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"4e75028c000e9560a7ff66a23d7cd872a967ab7e","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"d52ff592abfcd56234f266aa245c489f70b1c554","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"ad68e0b759f9569f0dfea84f035c91eadb979802","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"ec675b4cdfd378d8c9dd8c93126c024f2469bd79","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"728211c815f6eef28dd3df2a5b6297483185aa20","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"b9b0889071569d43623c260074e159cd8f26adb1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/irdma/verbs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","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":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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/infiniband/hw/irdma/verbs.c"]}],"references":["https://git.kernel.org/stable/c/4e75028c000e9560a7ff66a23d7cd872a967ab7e","https://git.kernel.org/stable/c/d52ff592abfcd56234f266aa245c489f70b1c554","https://git.kernel.org/stable/c/ad68e0b759f9569f0dfea84f035c91eadb979802","https://git.kernel.org/stable/c/ec675b4cdfd378d8c9dd8c93126c024f2469bd79","https://git.kernel.org/stable/c/728211c815f6eef28dd3df2a5b6297483185aa20","https://git.kernel.org/stable/c/b9b0889071569d43623c260074e159cd8f26adb1"],"weaknesses":[],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68418.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68418","state":"PUBLISHED","datePublished":"2026-08-10T12:04:38.930Z","dateUpdated":"2026-10-30T12:28:34.156Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.391Z"},"containers":{"cna":{"title":"RDMA/irdma: Prevent user-triggered null deref on QP create","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Prevent user-triggered null deref on QP create\n\nPreviously, the user QP creation path would only attempt to\npopulate iwqp->iwpbl if the user-provided req.user_wqe_bufs\nfield was non-zero. The problem is that iwqp->iwpbl is\nunconditionally dereferenced later on in irdma_setup_virt_qp.\n\nWhile there was a check for iwqp->iwpbl != NULL, this check\nwould only occur if req.user_wqe_bufs was non-zero. The end\nresult is that a user could send a zero user_wqe_bufs value\nand trigger a null ptr deref.\n\nFix this by unconditionally calling irdma_get_pbl and bailing\nif it fails, similar to the CQ and SRQ paths."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"4e75028c000e9560a7ff66a23d7cd872a967ab7e","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"d52ff592abfcd56234f266aa245c489f70b1c554","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"ad68e0b759f9569f0dfea84f035c91eadb979802","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"ec675b4cdfd378d8c9dd8c93126c024f2469bd79","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"728211c815f6eef28dd3df2a5b6297483185aa20","versionType":"git"},{"version":"b48c24c2d710cf34810c555dcef883a3d35a9c08","status":"affected","lessThan":"b9b0889071569d43623c260074e159cd8f26adb1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/irdma/verbs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","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":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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/infiniband/hw/irdma/verbs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4e75028c000e9560a7ff66a23d7cd872a967ab7e"},{"url":"https://git.kernel.org/stable/c/d52ff592abfcd56234f266aa245c489f70b1c554"},{"url":"https://git.kernel.org/stable/c/ad68e0b759f9569f0dfea84f035c91eadb979802"},{"url":"https://git.kernel.org/stable/c/ec675b4cdfd378d8c9dd8c93126c024f2469bd79"},{"url":"https://git.kernel.org/stable/c/728211c815f6eef28dd3df2a5b6297483185aa20"},{"url":"https://git.kernel.org/stable/c/b9b0889071569d43623c260074e159cd8f26adb1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:28:34.156Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}