{"id":"CVE-2024-26783","summary":"mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone index","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone index\n\nWith numa balancing on, when a numa system is running where a numa node\ndoesn't have its local memory so it has no managed zones, the following\noops has been observed.  It's because wakeup_kswapd() is called with a\nwrong zone index, -1.  Fixed it by checking the index before calling\nwakeup_kswapd().\n\n\u003e BUG: unable to handle page fault for address: 00000000000033f3\n\u003e #PF: supervisor read access in kernel mode\n\u003e #PF: error_code(0x0000) - not-present page\n\u003e PGD 0 P4D 0\n\u003e Oops: 0000 [#1] PREEMPT SMP NOPTI\n\u003e CPU: 2 PID: 895 Comm: masim Not tainted 6.6.0-dirty #255\n\u003e Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n\u003e    rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n\u003e RIP: 0010:wakeup_kswapd (./linux/mm/vmscan.c:7812)\n\u003e Code: (omitted)\n\u003e RSP: 0000:ffffc90004257d58 EFLAGS: 00010286\n\u003e RAX: ffffffffffffffff RBX: ffff88883fff0480 RCX: 0000000000000003\n\u003e RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88883fff0480\n\u003e RBP: ffffffffffffffff R08: ff0003ffffffffff R09: ffffffffffffffff\n\u003e R10: ffff888106c95540 R11: 0000000055555554 R12: 0000000000000003\n\u003e R13: 0000000000000000 R14: 0000000000000000 R15: ffff88883fff0940\n\u003e FS:  00007fc4b8124740(0000) GS:ffff888827c00000(0000) knlGS:0000000000000000\n\u003e CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n\u003e CR2: 00000000000033f3 CR3: 000000026cc08004 CR4: 0000000000770ee0\n\u003e DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n\u003e DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n\u003e PKRU: 55555554\n\u003e Call Trace:\n\u003e  \u003cTASK\u003e\n\u003e ? __die\n\u003e ? page_fault_oops\n\u003e ? __pte_offset_map_lock\n\u003e ? exc_page_fault\n\u003e ? asm_exc_page_fault\n\u003e ? wakeup_kswapd\n\u003e migrate_misplaced_page\n\u003e __handle_mm_fault\n\u003e handle_mm_fault\n\u003e do_user_addr_fault\n\u003e exc_page_fault\n\u003e asm_exc_page_fault\n\u003e RIP: 0033:0x55b897ba0808\n\u003e Code: (omitted)\n\u003e RSP: 002b:00007ffeefa821a0 EFLAGS: 00010287\n\u003e RAX: 000055b89983acd0 RBX: 00007ffeefa823f8 RCX: 000055b89983acd0\n\u003e RDX: 00007fc2f8122010 RSI: 0000000000020000 RDI: 000055b89983acd0\n\u003e RBP: 00007ffeefa821a0 R08: 0000000000000037 R09: 0000000000000075\n\u003e R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000\n\u003e R13: 00007ffeefa82410 R14: 000055b897ba5dd8 R15: 00007fc4b8340000\n\u003e  \u003c/TASK\u003e","modified":"2026-04-02T10:05:55.387857Z","published":"2024-04-04T08:20:17.118Z","related":["ALSA-2024:4583","SUSE-SU-2024:1644-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26783.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2774f256e7c0219e2b0a0894af1c76bdabc4f974"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bdd21eed8b72f9e28d6c279f6db258e090c79080"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6159bd4c00594249e305bfe02304c67c506264e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5ec1c24e71dbf144677a975d6ba91043c2193db"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26783.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26783"},{"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":"c574bbe917036c8968b984c82c7b13194fe5ce98"},{"fixed":"e5ec1c24e71dbf144677a975d6ba91043c2193db"},{"fixed":"d6159bd4c00594249e305bfe02304c67c506264e"},{"fixed":"bdd21eed8b72f9e28d6c279f6db258e090c79080"},{"fixed":"2774f256e7c0219e2b0a0894af1c76bdabc4f974"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26783.json"}}],"schema_version":"1.7.5"}