{ "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-2022-48940", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-48940", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2024-08-22T03:31:35.844Z", "updatedAt": "2026-08-05T08:53:01.254Z", "importedAt": "2026-10-24T01:56:45.230Z", "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": "bpf: Fix crash due to incorrect copy_map_value", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix crash due to incorrect copy_map_value\n\nWhen both bpf_spin_lock and bpf_timer are present in a BPF map value,\ncopy_map_value needs to skirt both objects when copying a value into and\nout of the map. However, the current code does not set both s_off and\nt_off in copy_map_value, which leads to a crash when e.g. bpf_spin_lock\nis placed in map value with bpf_timer, as bpf_map_update_elem call will\nbe able to overwrite the other timer object.\n\nWhen the issue is not fixed, an overwriting can produce the following\nsplat:\n\n[root@(none) bpf]# ./test_progs -t timer_crash\n[ 15.930339] bpf_testmod: loading out-of-tree module taints kernel.\n[ 16.037849] ==================================================================\n[ 16.038458] BUG: KASAN: user-memory-access in __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.038944] Write of size 8 at addr 0000000000043ec0 by task test_progs/325\n[ 16.039399]\n[ 16.039514] CPU: 0 PID: 325 Comm: test_progs Tainted: G OE 5.16.0+ #278\n[ 16.039983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.15.0-1 04/01/2014\n[ 16.040485] Call Trace:\n[ 16.040645] \n[ 16.040805] dump_stack_lvl+0x59/0x73\n[ 16.041069] ? __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.041427] kasan_report.cold+0x116/0x11b\n[ 16.041673] ? __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.042040] __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.042328] ? memcpy+0x39/0x60\n[ 16.042552] ? pv_hash+0xd0/0xd0\n[ 16.042785] ? lockdep_hardirqs_off+0x95/0xd0\n[ 16.043079] __bpf_spin_lock_irqsave+0xdf/0xf0\n[ 16.043366] ? bpf_get_current_comm+0x50/0x50\n[ 16.043608] ? jhash+0x11a/0x270\n[ 16.043848] bpf_timer_cancel+0x34/0xe0\n[ 16.044119] bpf_prog_c4ea1c0f7449940d_sys_enter+0x7c/0x81\n[ 16.044500] bpf_trampoline_6442477838_0+0x36/0x1000\n[ 16.044836] __x64_sys_nanosleep+0x5/0x140\n[ 16.045119] do_syscall_64+0x59/0x80\n[ 16.045377] ? lock_is_held_type+0xe4/0x140\n[ 16.045670] ? irqentry_exit_to_user_mode+0xa/0x40\n[ 16.046001] ? mark_held_locks+0x24/0x90\n[ 16.046287] ? asm_exc_page_fault+0x1e/0x30\n[ 16.046569] ? asm_exc_page_fault+0x8/0x30\n[ 16.046851] ? lockdep_hardirqs_on+0x7e/0x100\n[ 16.047137] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 16.047405] RIP: 0033:0x7f9e4831718d\n[ 16.047602] Code: b4 0c 00 0f 05 eb a9 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b3 6c 0c 00 f7 d8 64 89 01 48\n[ 16.048764] RSP: 002b:00007fff488086b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000023\n[ 16.049275] RAX: ffffffffffffffda RBX: 00007f9e48683740 RCX: 00007f9e4831718d\n[ 16.049747] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff488086d0\n[ 16.050225] RBP: 00007fff488086f0 R08: 00007fff488085d7 R09: 00007f9e4cb594a0\n[ 16.050648] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f9e484cde30\n[ 16.051124] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[ 16.051608] \n[ 16.051762] ==================================================================", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "68134668c17f31f51930478f75495b552a411550", "status": "affected", "versionType": "git", "lessThan": "719d1c2524c89ada78c4c9202641c1d9e942a322" }, { "version": "68134668c17f31f51930478f75495b552a411550", "status": "affected", "versionType": "git", "lessThan": "eca9bd215d2233de79d930fa97aefbce03247a98" }, { "version": "68134668c17f31f51930478f75495b552a411550", "status": "affected", "versionType": "git", "lessThan": "a8abb0c3dc1e28454851a00f8b7333d9695d566c" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.15" }, { "version": "5.15.26", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.16.12", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.16.*" }, { "version": "5.17", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }