{"id":"CVE-2026-90417","title":"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 call…","summary":"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 call…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 0f8ab0b6e91b4d5302ceee5ec12ce54d81297635 < 6b15fc9bc117fb6597fa1c2cc30284aafe71101c","Linux >= 0f8ab0b6e91b4d5302ceee5ec12ce54d81297635 < 373f3716a2de7adc739269ebb4d87e5bf4dc180c","Linux 4.8"],"published":"2026-09-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:02.833","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90417","references":[{"url":"https://git.kernel.org/stable/c/2fcd26f4680143e9ec477069530548dbe20fce6f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/373f3716a2de7adc739269ebb4d87e5bf4dc180c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6b15fc9bc117fb6597fa1c2cc30284aafe71101c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90417.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90417"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536483"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90417"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90417"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90417.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-90417"},{"url":"https://git.kernel.org/stable/c/68c1d2c085f205e8a5338bc3d3304f897deca4d9"},{"url":"https://git.kernel.org/stable/c/379cf06e6fe34af980064c6ccaf15d8e26ec4a42"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00213,"epssPercentile":0.11562,"ingestedAt":"2026-09-17T16:21:47.795Z","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-401"],"slug":"CVE-2026-90417","body":"## Overview\n\nIn 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90417.json)","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227076,"id":"CVE-2026-90417","ts":1792585066669,"field":"cvss","old":null,"new":"4.7"},{"seq":227075,"id":"CVE-2026-90417","ts":1792585066669,"field":"severity","old":"none","new":"medium"}]}