{ "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-2024-26703", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26703", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-04-03T14:55:01.838Z", "updatedAt": "2026-05-11T20:02:32.960Z", "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": "tracing/timerlat: Move hrtimer_init to timerlat_fd open()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/timerlat: Move hrtimer_init to timerlat_fd open()\n\nCurrently, the timerlat's hrtimer is initialized at the first read of\ntimerlat_fd, and destroyed at close(). It works, but it causes an error\nif the user program open() and close() the file without reading.\n\nHere's an example:\n\n # echo NO_OSNOISE_WORKLOAD > /sys/kernel/debug/tracing/osnoise/options\n # echo timerlat > /sys/kernel/debug/tracing/current_tracer\n\n # cat < ./timerlat_load.py\n # !/usr/bin/env python3\n\n timerlat_fd = open(\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\", 'r')\n timerlat_fd.close();\n EOF\n\n # ./taskset -c 0 ./timerlat_load.py\n\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:hrtimer_active+0xd/0x50\n Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 <8b> 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d\n RSP: 0018:ffffb031009b7e10 EFLAGS: 00010286\n RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08\n RBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08\n R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000\n FS: 00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0\n PKRU: 55555554\n Call Trace:\n \n ? __die+0x23/0x70\n ? page_fault_oops+0x171/0x4e0\n ? srso_alias_return_thunk+0x5/0x7f\n ? avc_has_extended_perms+0x237/0x520\n ? exc_page_fault+0x7f/0x180\n ? asm_exc_page_fault+0x26/0x30\n ? hrtimer_active+0xd/0x50\n hrtimer_cancel+0x15/0x40\n timerlat_fd_release+0x48/0xe0\n __fput+0xf5/0x290\n __x64_sys_close+0x3d/0x80\n do_syscall_64+0x60/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? __x64_sys_ioctl+0x72/0xd0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n ? srso_alias_return_thunk+0x5/0x7f\n ? exit_to_user_mode_prepare+0x142/0x1f0\n ? srso_alias_return_thunk+0x5/0x7f\n ? syscall_exit_to_user_mode+0x2b/0x40\n ? srso_alias_return_thunk+0x5/0x7f\n ? do_syscall_64+0x6c/0x90\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n RIP: 0033:0x7f2ffb321594\n Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d\n RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\n RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000\n R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003\n R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668\n \n CR2: 0000000000000010\n ---[ end trace 0000000000000000 ]---\n\nMove hrtimer_init to timerlat_fd open() to avoid this problem.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "status": "affected", "versionType": "git", "lessThan": "5f703935fdb559642d85b2088442ee55a557ae6d" }, { "version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "status": "affected", "versionType": "git", "lessThan": "2354d29986ebd138f89c2b73fecf8237e0a4ad6b" }, { "version": "e88ed227f639ebcb31ed4e5b88756b47d904584b", "status": "affected", "versionType": "git", "lessThan": "1389358bb008e7625942846e9f03554319b7fecc" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.5" }, { "version": "6.6.18", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }