{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-15T06:43:20.444","vulnerabilities":[{"cve":{"id":"CVE-2023-53634","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-10-07T16:15:46.523","lastModified":"2026-02-03T22:26:04.397","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, arm64: Fixed a BTI error on returning to patched function\n\nWhen BPF_TRAMP_F_CALL_ORIG is set, BPF trampoline uses BLR to jump\nback to the instruction next to call site to call the patched function.\nFor BTI-enabled kernel, the instruction next to call site is usually\nPACIASP, in this case, it's safe to jump back with BLR. But when\nthe call site is not followed by a PACIASP or bti, a BTI exception\nis triggered.\n\nHere is a fault log:\n\n Unhandled 64-bit el1h sync exception on CPU0, ESR 0x0000000034000002 -- BTI\n CPU: 0 PID: 263 Comm: test_progs Tainted: GF\n Hardware name: linux,dummy-virt (DT)\n pstate: 40400805 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=-c)\n pc : bpf_fentry_test1+0xc\/0x30\n lr : bpf_trampoline_6442573892_0+0x48\/0x1000\n sp : ffff80000c0c3a50\n x29: ffff80000c0c3a90 x28: ffff0000c2e6c080 x27: 0000000000000000\n x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000050\n x23: 0000000000000000 x22: 0000ffffcfd2a7f0 x21: 000000000000000a\n x20: 0000ffffcfd2a7f0 x19: 0000000000000000 x18: 0000000000000000\n x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffffcfd2a7f0\n x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n x11: 0000000000000000 x10: ffff80000914f5e4 x9 : ffff8000082a1528\n x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0101010101010101\n x5 : 0000000000000000 x4 : 00000000fffffff2 x3 : 0000000000000001\n x2 : ffff8001f4b82000 x1 : 0000000000000000 x0 : 0000000000000001\n Kernel panic - not syncing: Unhandled exception\n CPU: 0 PID: 263 Comm: test_progs Tainted: GF\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n  dump_backtrace+0xec\/0x144\n  show_stack+0x24\/0x7c\n  dump_stack_lvl+0x8c\/0xb8\n  dump_stack+0x18\/0x34\n  panic+0x1cc\/0x3ec\n  __el0_error_handler_common+0x0\/0x130\n  el1h_64_sync_handler+0x60\/0xd0\n  el1h_64_sync+0x78\/0x7c\n  bpf_fentry_test1+0xc\/0x30\n  bpf_fentry_test1+0xc\/0x30\n  bpf_prog_test_run_tracing+0xdc\/0x2a0\n  __sys_bpf+0x438\/0x22a0\n  __arm64_sys_bpf+0x30\/0x54\n  invoke_syscall+0x78\/0x110\n  el0_svc_common.constprop.0+0x6c\/0x1d0\n  do_el0_svc+0x38\/0xe0\n  el0_svc+0x30\/0xd0\n  el0t_64_sync_handler+0x1ac\/0x1b0\n  el0t_64_sync+0x1a0\/0x1a4\n Kernel Offset: disabled\n CPU features: 0x0000,00034c24,f994fdab\n Memory Limit: none\n\nAnd the instruction next to call site of bpf_fentry_test1 is ADD,\nnot PACIASP:\n\n<bpf_fentry_test1>:\n\tbti     c\n\tnop\n\tnop\n\tadd     w0, w0, #0x1\n\tpaciasp\n\nFor BPF prog, JIT always puts a PACIASP after call site for BTI-enabled\nkernel, so there is no problem. To fix it, replace BLR with RET to bypass\nthe branch target check."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1\/AV:L\/AC:L\/PR:L\/UI:N\/S:U\/C:N\/I:N\/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.25","matchCriteriaId":"D2C90BB9-CA3C-4D97-9D92-C46FE5B9B2EC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.2.12","matchCriteriaId":"4AA01E0B-227C-4686-AC91-BA30BCC48E6D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*","matchCriteriaId":"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*","matchCriteriaId":"A47F0FC3-CE52-4BA1-BA51-22F783938431"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*","matchCriteriaId":"3583026A-27EC-4A4C-850A-83F2AF970673"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*","matchCriteriaId":"DC271202-7570-4505-89A4-D602D47BFD00"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*","matchCriteriaId":"D413BB6D-4F74-4C7D-9163-47786619EF53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc6:*:*:*:*:*:*","matchCriteriaId":"F4D613FB-9976-4989-8C4A-567773373CEA"}]}]}],"references":[{"url":"https:\/\/git.kernel.org\/stable\/c\/738a96c4a8c36950803fdd27e7c30aca92dccefd","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/8b9c64942ada229f52fe6f1b537a50f88b3c2673","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https:\/\/git.kernel.org\/stable\/c\/eabc166919d169e105263974991f52b0351e431a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}