{"id":"CVE-2026-31552","summary":"wifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom\n\nSince upstream commit e75665dd0968 (\"wifi: wlcore: ensure skb headroom\nbefore skb_push\"), wl1271_tx_allocate() and with it\nwl1271_prepare_tx_frame() returns -EAGAIN if pskb_expand_head() fails.\nHowever, in wlcore_tx_work_locked(), a return value of -EAGAIN from\nwl1271_prepare_tx_frame() is interpreted as the aggregation buffer being\nfull. This causes the code to flush the buffer, put the skb back at the\nhead of the queue, and immediately retry the same skb in a tight while\nloop.\n\nBecause wlcore_tx_work_locked() holds wl-\u003emutex, and the retry happens\nimmediately with GFP_ATOMIC, this will result in an infinite loop and a\nCPU soft lockup. Return -ENOMEM instead so the packet is dropped and\nthe loop terminates.\n\nThe problem was found by an experimental code review agent based on\ngemini-3.1-pro while reviewing backports into v6.18.y.","modified":"2026-07-22T18:22:41.381582868Z","published":"2026-04-24T14:33:19.065Z","related":["SUSE-SU-2026:3130-1","SUSE-SU-2026:3166-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31552.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/12f9eef39e49716c763714bfda835a733d5f6dea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46c670ff1ff466e5eccb3940f726586473dc053c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/980f793645540ca7a6318165cc12f49d5febeb99"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a6dc74209462c4fe5a88718d2f3a5286886081c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ceb46b40b021d21911ff8608ce4ed33c1264ad2f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cfa64e2b3717be1da7c4c1aff7268a009e8c1610"},{"type":"WEB","url":"https://git.kernel.org/stable/c/deb353d9bb009638b7762cae2d0b6e8fdbb41a69"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31552.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31552"},{"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":"88295a55fefe5414e64293638b6f7549646e58ed"},{"fixed":"980f793645540ca7a6318165cc12f49d5febeb99"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cd89a4656c03f8db0c57350aaec69cd3cfaa3522"},{"fixed":"12f9eef39e49716c763714bfda835a733d5f6dea"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"745a0810dbc96a0471e5f5e627ba1e978c3116d4"},{"fixed":"ceb46b40b021d21911ff8608ce4ed33c1264ad2f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b167312390fdd461c81ead516f2b0b44e83a9edb"},{"fixed":"a6dc74209462c4fe5a88718d2f3a5286886081c8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"71de0b6e04bbee5575caf9a1e4d424e7dcc50018"},{"fixed":"cfa64e2b3717be1da7c4c1aff7268a009e8c1610"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"689a7980e4788e13e766763d53569fb78dea2513"},{"fixed":"46c670ff1ff466e5eccb3940f726586473dc053c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e75665dd096819b1184087ba5718bd93beafff51"},{"fixed":"f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c"},{"fixed":"deb353d9bb009638b7762cae2d0b6e8fdbb41a69"}]}],"versions":["v5.10.252","v5.10.251","v5.10.250","v5.15.202","v5.15.201","v5.15.200","v6.1.166","v6.1.165","v6.1.164","v6.1.163","v6.6.129","v6.6.128","v6.6.127","v6.6.126","v6.6.125","v6.6.124","v6.12.77","v6.12.76","v6.12.75","v6.12.74","v6.12.73","v6.12.72","v6.12.71","v6.12.70","v6.18.19","v6.18.18","v6.18.17","v6.18.16","v6.18.15","v6.18.14","v6.18.13","v6.18.12","v6.18.11","v6.18.10"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31552.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.20"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31552.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}