{"id":"CVE-2026-90307","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ\n\nsrp_recv_done() passes wc->byte_len to srp_process_rsp()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ\n\nsrp_recv_done() passes wc->byte_len to srp_process_rsp(). It passes\nnothing to srp_process_cred_req() a…","severity":"high","vendor":"Linux","product":"Linux","affected":["Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < 3f7fdf561f1ec3b523c39708df00bd808671668d","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < 138eb2f0ef02adfe6ad126afad5b54c56b5046ee","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < 3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < 0e7ba617514902501514d577647d866e670dad90","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < 001adf2fe87d1ab677c014a97467bbea5153ae5f","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < fa1b33fdab3e79dce83721ead3220200a2dbec22","Linux >= bb12588a38e6db85e01dceadff7bc161fc92e7d2 < 961ac0f0c5e414abdd6b33fae84b311d9fde0bd0","Linux 2.6.37"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:28.377","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90307","references":[{"url":"https://git.kernel.org/stable/c/001adf2fe87d1ab677c014a97467bbea5153ae5f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0e7ba617514902501514d577647d866e670dad90","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/138eb2f0ef02adfe6ad126afad5b54c56b5046ee","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3f7fdf561f1ec3b523c39708df00bd808671668d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/961ac0f0c5e414abdd6b33fae84b311d9fde0bd0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fa1b33fdab3e79dce83721ead3220200a2dbec22","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90307.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90307"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536240"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90307"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90307"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90307.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-90307"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.827Z","epss":0.00216,"epssPercentile":0.12014,"cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","cvssSource":"vendor","cwe":["CWE-200"],"slug":"CVE-2026-90307","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ\n\nsrp_recv_done() passes wc->byte_len to srp_process_rsp(). It passes\nnothing to srp_process_cred_req() and srp_process_aer_req(), which read\nfixed-size fields from the receive buffer without checking that those\nfields were received.\n\nThe buffer size is max_ti_iu_len, which comes from the login response\nand is not validated. A target that advertises 8 and then sends an\n8-byte SRP_CRED_REQ makes the initiator read req->tag from beyond the\nend of the buffer. req->tag is copied into the SRP_CRED_RSP and sent\nback, so those bytes reach the target. SRP_AER_REQ behaves the same way\nand also reads req->lun.\n\nThe leak is 8 bytes per response. max_ti_iu_len also decides which slab\ncache the buffer comes from. With 8 the buffer is a kmalloc-8 object and\nthe read is entirely outside it:\n\n  BUG: KASAN: slab-out-of-bounds in srp_recv_done+0x172b/0x1aa0\n  Read of size 8 at addr ffff888104714da8 by task kworker/u8:3/50\n   which belongs to the cache kmalloc-8 of size 8\n  The buggy address is located 0 bytes to the right of\n   allocated 8-byte region [ffff888104714da0, ffff888104714da8)\n\nWithout KASAN the returned bytes are whatever is next in the slab. One\nrun returned \".strtab\".\n\nrsp->data[3] in srp_process_rsp() has the same problem: only\nresp_data_len is checked before it is read.\n\nDrop a request that is shorter than the structure being parsed, and\ncheck byte_len before the tsk_mgmt read.\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-2026-90307.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227070,"id":"CVE-2026-90307","ts":1792585059935,"field":"cvss","old":null,"new":"8.2"},{"seq":227069,"id":"CVE-2026-90307","ts":1792585059935,"field":"severity","old":"none","new":"high"}]}