{"id":"CVE-2026-90417","state":"PUBLISHED","title":"RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()\n\nWhen the device is in the fatal error state, write_tpt_entry() returns -EIO\nbefore handing the caller's preallocated skb to the transmit path; its\nallocation-failure returns do the same. c4iw_dereg_mr() ignores the error\nand frees mhp, leaking mhp->dereg_skb. c4iw_get_dma_mr() instead frees the\nskb a second time after dereg_mem() already consumed it, a double free.\n\nMake write_tpt_entry() the sole owner of a non-NULL skb, freeing it on\nevery return preceding handoff to c4iw_ofld_send(): fatal error, tpt and\nstag allocation failure. c4iw_ofld_send() consumes the skb on success and\nerror alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after\ndereg_mem().","publishedAt":"2026-09-17T16:09:42.342Z","updatedAt":"2026-10-30T12:35:32.436Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"26c6e9bc0b907b880c5d8486291f0452c8227fbe","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"68c1d2c085f205e8a5338bc3d3304f897deca4d9","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"379cf06e6fe34af980064c6ccaf15d8e26ec4a42","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"2fcd26f4680143e9ec477069530548dbe20fce6f","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"6b15fc9bc117fb6597fa1c2cc30284aafe71101c","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"373f3716a2de7adc739269ebb4d87e5bf4dc180c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/cxgb4/mem.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.8","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":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","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/cxgb4/mem.c"]}],"references":["https://git.kernel.org/stable/c/26c6e9bc0b907b880c5d8486291f0452c8227fbe","https://git.kernel.org/stable/c/68c1d2c085f205e8a5338bc3d3304f897deca4d9","https://git.kernel.org/stable/c/379cf06e6fe34af980064c6ccaf15d8e26ec4a42","https://git.kernel.org/stable/c/2fcd26f4680143e9ec477069530548dbe20fce6f","https://git.kernel.org/stable/c/6b15fc9bc117fb6597fa1c2cc30284aafe71101c","https://git.kernel.org/stable/c/373f3716a2de7adc739269ebb4d87e5bf4dc180c"],"weaknesses":[],"ingestedAt":"2026-10-30T12:54:04.478Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90417.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90417","state":"PUBLISHED","datePublished":"2026-09-17T16:09:42.342Z","dateUpdated":"2026-10-30T12:35:32.436Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.813Z"},"containers":{"cna":{"title":"RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()\n\nWhen the device is in the fatal error state, write_tpt_entry() returns -EIO\nbefore handing the caller's preallocated skb to the transmit path; its\nallocation-failure returns do the same. c4iw_dereg_mr() ignores the error\nand frees mhp, leaking mhp->dereg_skb. c4iw_get_dma_mr() instead frees the\nskb a second time after dereg_mem() already consumed it, a double free.\n\nMake write_tpt_entry() the sole owner of a non-NULL skb, freeing it on\nevery return preceding handoff to c4iw_ofld_send(): fatal error, tpt and\nstag allocation failure. c4iw_ofld_send() consumes the skb on success and\nerror alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after\ndereg_mem()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"26c6e9bc0b907b880c5d8486291f0452c8227fbe","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"68c1d2c085f205e8a5338bc3d3304f897deca4d9","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"379cf06e6fe34af980064c6ccaf15d8e26ec4a42","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"2fcd26f4680143e9ec477069530548dbe20fce6f","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"6b15fc9bc117fb6597fa1c2cc30284aafe71101c","versionType":"git"},{"version":"0f8ab0b6e91b4d5302ceee5ec12ce54d81297635","status":"affected","lessThan":"373f3716a2de7adc739269ebb4d87e5bf4dc180c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/cxgb4/mem.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.8","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":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","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/cxgb4/mem.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/26c6e9bc0b907b880c5d8486291f0452c8227fbe"},{"url":"https://git.kernel.org/stable/c/68c1d2c085f205e8a5338bc3d3304f897deca4d9"},{"url":"https://git.kernel.org/stable/c/379cf06e6fe34af980064c6ccaf15d8e26ec4a42"},{"url":"https://git.kernel.org/stable/c/2fcd26f4680143e9ec477069530548dbe20fce6f"},{"url":"https://git.kernel.org/stable/c/6b15fc9bc117fb6597fa1c2cc30284aafe71101c"},{"url":"https://git.kernel.org/stable/c/373f3716a2de7adc739269ebb4d87e5bf4dc180c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:35:32.436Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}