{"id":"AZL-109149","summary":"CVE-2026-98816 affecting package kernel 6.6.157.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix overflow of jump offset in constant blinding\n\nbpf_jit_blind_insn() rewrites 'if rX op imm goto off' into:\n\n  AX = imm ^ rnd\n  AX ^= rnd\n  if rX op AX goto off\n\nand subtracts 2 from off when the jump is backward. off is s16, so\n-32767 and -32768 wrap and the jump goes 32767 insns forward, past the\nend of the prog. The jump is inside the patch, hence bpf_adj_branches()\ndoesn't check it. The kernel crashes when such prog runs with\nbpf_jit_harden=2.\n\nReturn -ERANGE in such case. bpf_jit_blind_constants() fails the same\nway when blinding of other insns moves a jump out of range.","modified":"2026-10-19T14:16:31.632533789Z","published":"2026-10-18T16:17:35Z","upstream":["CVE-2026-98816"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98816"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.157.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-109149.json"}}],"schema_version":"1.9.0"}