{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-26766", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26766", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-04-03T17:00:48.642Z", "updatedAt": "2026-08-05T11:27:06.552Z", "importedAt": "2026-10-24T01:57:07.518Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "IB/hfi1: Fix sdma.h tx->num_descs off-by-one error", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Fix sdma.h tx->num_descs off-by-one error\n\nUnfortunately the commit `fd8958efe877` introduced another error\ncausing the `descs` array to overflow. This reults in further crashes\neasily reproducible by `sendmsg` system call.\n\n[ 1080.836473] general protection fault, probably for non-canonical address 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI\n[ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1]\n--\n[ 1080.974535] Call Trace:\n[ 1080.976990] \n[ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1]\n[ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1]\n[ 1081.032633] hfi1_ipoib_send+0x112/0x300 [hfi1]\n[ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib]\n[ 1081.046978] dev_hard_start_xmit+0xc4/0x210\n--\n[ 1081.148347] __sys_sendmsg+0x59/0xa0\n\ncrash> ipoib_txreq 0xffff9cfeba229f00\nstruct ipoib_txreq {\n txreq = {\n list = {\n next = 0xffff9cfeba229f00,\n prev = 0xffff9cfeba229f00\n },\n descp = 0xffff9cfeba229f40,\n coalesce_buf = 0x0,\n wait = 0xffff9cfea4e69a48,\n complete = 0xffffffffc0fe0760 ,\n packet_len = 0x46d,\n tlen = 0x0,\n num_desc = 0x0,\n desc_limit = 0x6,\n next_descq_idx = 0x45c,\n coalesce_idx = 0x0,\n flags = 0x0,\n descs = {{\n qw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63)\n }, {\n qw = { 0x3800014231b108, 0x4}\n }, {\n qw = { 0x310000e4ee0fcf0, 0x8}\n }, {\n qw = { 0x3000012e9f8000, 0x8}\n }, {\n qw = { 0x59000dfb9d0000, 0x8}\n }, {\n qw = { 0x78000e02e40000, 0x8}\n }}\n },\n sdma_hdr = 0x400300015528b000, <<< invalid pointer in the tx request structure\n sdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62)\n complete = 0x0,\n priv = 0x0,\n txq = 0xffff9cfea4e69880,\n skb = 0xffff9d099809f400\n}\n\nIf an SDMA send consists of exactly 6 descriptors and requires dword\npadding (in the 7th descriptor), the sdma_txreq descriptor array is not\nproperly expanded and the packet will overflow into the container\nstructure. This results in a panic when the send completion runs. The\nexact panic varies depending on what elements of the container structure\nget corrupted. The fix is to use the correct expression in\n_pad_sdma_tx_descs() to test the need to expand the descriptor array.\n\nWith this patch the crashes are no longer reproducible and the machine is\nstable.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d1c1ee052d25ca23735eea912f843bc7834781b4", "status": "affected", "versionType": "git", "lessThan": "115b7f3bc1dce590a6851a2dcf23dc1100c49790" }, { "version": "40ac5cb6cbb01afa40881f78b4d2f559fb7065c4", "status": "affected", "versionType": "git", "lessThan": "5833024a9856f454a964a198c63a57e59e07baf5" }, { "version": "6cf8f3d690bb5ad31ef0f41a6206ecf5a068d179", "status": "affected", "versionType": "git", "lessThan": "3f38d22e645e2e994979426ea5a35186102ff3c2" }, { "version": "bd57756a7e43c7127d0eca1fc5868e705fd0f7ba", "status": "affected", "versionType": "git", "lessThan": "47ae64df23ed1318e27bd9844e135a5e1c0e6e39" }, { "version": "eeaf35f4e3b360162081de5e744cf32d6d1b0091", "status": "affected", "versionType": "git", "lessThan": "52dc9a7a573dbf778625a0efca0fca55489f084b" }, { "version": "fd8958efe8779d3db19c9124fce593ce681ac709", "status": "affected", "versionType": "git", "lessThan": "a2fef1d81becf4ff60e1a249477464eae3c3bc2a" }, { "version": "fd8958efe8779d3db19c9124fce593ce681ac709", "status": "affected", "versionType": "git", "lessThan": "9034a1bec35e9f725315a3bb6002ef39666114d9" }, { "version": "fd8958efe8779d3db19c9124fce593ce681ac709", "status": "affected", "versionType": "git", "lessThan": "e6f57c6881916df39db7d95981a8ad2b9c3458d6" }, { "version": "0ef9594936d1f078e8599a1cf683b052df2bec00", "status": "affected", "versionType": "git" }, { "version": "4.19.291", "status": "affected", "versionType": "semver", "lessThan": "4.19.308" }, { "version": "5.4.251", "status": "affected", "versionType": "semver", "lessThan": "5.4.270" }, { "version": "5.10.188", "status": "affected", "versionType": "semver", "lessThan": "5.10.211" }, { "version": "5.15.99", "status": "affected", "versionType": "semver", "lessThan": "5.15.150" }, { "version": "6.1.16", "status": "affected", "versionType": "semver", "lessThan": "6.1.80" }, { "version": "6.2.3", "status": "affected", "versionType": "semver", "lessThan": "6.3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.3" }, { "version": "4.19.308", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.211", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.150", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.80", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.19", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }