{"id":"CVE-2024-26766","summary":"IB/hfi1: Fix sdma.h tx-\u003enum_descs off-by-one error","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Fix sdma.h tx-\u003enum_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]  \u003cTASK\u003e\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\u003e 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 \u003chfi1_ipoib_sdma_complete\u003e,\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,  \u003c\u003c\u003c 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.","modified":"2026-10-28T02:30:28.576122637Z","published":"2024-04-03T17:00:48.642Z","related":["ALSA-2026:1661","ALSA-2026:1662","SUSE-SU-2024:1490-1","SUSE-SU-2024:1641-1","SUSE-SU-2024:1644-1","SUSE-SU-2024:1647-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1","SUSE-SU-2024:1677-1","SUSE-SU-2024:1679-1","SUSE-SU-2024:1680-1","SUSE-SU-2024:1682-1","SUSE-SU-2024:1685-1","SUSE-SU-2024:1695-1","SUSE-SU-2024:1705-1","SUSE-SU-2024:1711-1","SUSE-SU-2024:1726-1","SUSE-SU-2024:1739-1","SUSE-SU-2024:1740-1","SUSE-SU-2024:1748-1","SUSE-SU-2024:1749-1","SUSE-SU-2024:1750-1","SUSE-SU-2024:1753-1","SUSE-SU-2024:1757-1","SUSE-SU-2024:1759-1","SUSE-SU-2024:2092-1","SUSE-SU-2024:2162-1","SUSE-SU-2024:2163-1","SUSE-SU-2024:2191-1","SUSE-SU-2024:2207-1","SUSE-SU-2024:2337-1","SUSE-SU-2024:2446-1","SUSE-SU-2024:2447-1","SUSE-SU-2024:2448-1","SUSE-SU-2024:2722-1","SUSE-SU-2024:2824-1","SUSE-SU-2024:2825-1","SUSE-SU-2024:2840-1","SUSE-SU-2024:2850-1","SUSE-SU-2024:3368-1","SUSE-SU-2024:3375-1","SUSE-SU-2024:3379-1","SUSE-SU-2024:3399-1","SUSE-SU-2024:3631-1","SUSE-SU-2024:3694-1","SUSE-SU-2024:3695-1","SUSE-SU-2024:3696-1","SUSE-SU-2024:3793-1","SUSE-SU-2024:3815-1","SUSE-SU-2024:3829-1","SUSE-SU-2024:3851-1","SUSE-SU-2024:3852-1","SUSE-SU-2024:4122-1","SUSE-SU-2024:4218-1","SUSE-SU-2024:4234-1","SUSE-SU-2024:4235-1","SUSE-SU-2024:4266-1","SUSE-SU-2025:0107-1","SUSE-SU-2025:0109-1","SUSE-SU-2025:0150-1","SUSE-SU-2025:0158-1","SUSE-SU-2025:0248-1","SUSE-SU-2025:0251-1","SUSE-SU-2025:0261-1","SUSE-SU-2025:0266-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26766.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39"},{"type":"WEB","url":"https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26766.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26766"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d1c1ee052d25ca23735eea912f843bc7834781b4"},{"fixed":"115b7f3bc1dce590a6851a2dcf23dc1100c49790"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"40ac5cb6cbb01afa40881f78b4d2f559fb7065c4"},{"fixed":"5833024a9856f454a964a198c63a57e59e07baf5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6cf8f3d690bb5ad31ef0f41a6206ecf5a068d179"},{"fixed":"3f38d22e645e2e994979426ea5a35186102ff3c2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bd57756a7e43c7127d0eca1fc5868e705fd0f7ba"},{"fixed":"47ae64df23ed1318e27bd9844e135a5e1c0e6e39"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"eeaf35f4e3b360162081de5e744cf32d6d1b0091"},{"fixed":"52dc9a7a573dbf778625a0efca0fca55489f084b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fd8958efe8779d3db19c9124fce593ce681ac709"},{"fixed":"a2fef1d81becf4ff60e1a249477464eae3c3bc2a"},{"fixed":"9034a1bec35e9f725315a3bb6002ef39666114d9"},{"fixed":"e6f57c6881916df39db7d95981a8ad2b9c3458d6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.291"},{"fixed":"4.19.308"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.251"},{"fixed":"5.4.270"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.188"},{"fixed":"5.10.211"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.99"},{"fixed":"5.15.150"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.16"},{"fixed":"6.1.80"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.2.3"},{"fixed":"6.3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0ef9594936d1f078e8599a1cf683b052df2bec00"}]}],"versions":["v4.19.307","v4.19.306","v4.19.305","v4.19.304","v4.19.303","v4.19.302","v4.19.301","v4.19.300","v4.19.299","v4.19.298","v4.19.297","v4.19.296","v4.19.295","v4.19.294","v4.19.293","v4.19.292","v4.19.291","v5.4.269","v5.4.268","v5.4.267","v5.4.266","v5.4.265","v5.4.264","v5.4.263","v5.4.262","v5.4.261","v5.4.260","v5.4.259","v5.4.258","v5.4.257","v5.4.256","v5.4.255","v5.4.254","v5.4.253","v5.4.252","v5.4.251","v5.10.210","v5.10.209","v5.10.208","v5.10.207","v5.10.206","v5.10.205","v5.10.204","v5.10.203","v5.10.202","v5.10.201","v5.10.200","v5.10.199","v5.10.198","v5.10.197","v5.10.196","v5.10.195","v5.10.194","v5.10.193","v5.10.192","v5.10.191","v5.10.190","v5.10.189","v5.10.188","v5.15.149","v5.15.148","v5.15.147","v5.15.146","v5.15.145","v5.15.144","v5.15.143","v5.15.142","v5.15.141","v5.15.140","v5.15.139","v5.15.138","v5.15.137","v5.15.136","v5.15.135","v5.15.134","v5.15.133","v5.15.132","v5.15.131","v5.15.130","v5.15.129","v5.15.128","v5.15.127","v5.15.126","v5.15.125","v5.15.124","v5.15.123","v5.15.122","v5.15.121","v5.15.120","v5.15.119","v5.15.118","v5.15.117","v5.15.116","v5.15.115","v5.15.114","v5.15.113","v5.15.112","v5.15.111","v5.15.110","v5.15.109","v5.15.108","v5.15.107","v5.15.106","v5.15.105","v5.15.104","v5.15.103","v5.15.102","v5.15.101","v5.15.100","v5.15.99","v6.1.79","v6.1.78","v6.1.77","v6.1.76","v6.1.75","v6.1.74","v6.1.73","v6.1.72","v6.1.71","v6.1.70","v6.1.69","v6.1.68","v6.1.67","v6.1.66","v6.1.65","v6.1.64","v6.1.63","v6.1.62","v6.1.61","v6.1.60","v6.1.59","v6.1.58","v6.1.57","v6.1.56","v6.1.55","v6.1.54","v6.1.53","v6.1.52","v6.1.51","v6.1.50","v6.1.49","v6.1.48","v6.1.47","v6.1.46","v6.1.45","v6.1.44","v6.1.43","v6.1.42","v6.1.41","v6.1.40","v6.1.39","v6.1.38","v6.1.37","v6.1.36","v6.1.35","v6.1.34","v6.1.33","v6.1.32","v6.1.31","v6.1.30","v6.1.29","v6.1.28","v6.1.27","v6.1.26","v6.1.25","v6.1.24","v6.1.23","v6.1.22","v6.1.21","v6.1.20","v6.1.19","v6.1.18","v6.1.17","v6.1.16","v6.2.16","v6.2.15","v6.2.14","v6.2.13","v6.2.12","v6.2.11","v6.2.10","v6.2.9","v6.2.8","v6.2.7","v6.2.6","v6.2.5","v6.2.4","v6.2.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26766.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.19.308"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.211"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.150"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.7.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26766.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}