{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98589","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.358Z","datePublished":"2026-10-18T15:19:01.769Z","dateUpdated":"2026-10-19T09:22:14.803Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:22:14.803Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject pkt arguments in mutating subprogs\n\nThe verifier tracks changes in how PTR_TO_PACKET registers'\nbounds are modified across subprog boundaries. PTR_TO_PACKET\nregisters are actually passed as PTR_TO_MEM, which is assumed\nvalid for the entire call. This is not the case with packet memory,\nwhere a pskb_* call may invalidate its memory region.\n\nReject BPF code that passes PTR_TO_PACKET pointers to subprogs that\nmay mutate a packet. We cannot pass the pointer as a true PTR_TO_PACKET\nbecause we would also need to somehow pass the PTR_TO_PACKET_META\nor PTR_TO_PACKET_END to the subprog. Since we cannot avoid representing\nthe pointer in the subprog as PTR_TO_MEM, only permit it if the\nsubprog is guaranteed not to mutate the packet."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"0b6b2bb9b90ad1e2d94d18f626258a1dbbdee0ea","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a6c1edfbe240e4377038a0e1d233ad81fde9a21b","status":"affected","versionType":"git"},{"version":"0","lessThan":"7.2.9","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"],"versions":[{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/0b6b2bb9b90ad1e2d94d18f626258a1dbbdee0ea"},{"url":"https://git.kernel.org/stable/c/a6c1edfbe240e4377038a0e1d233ad81fde9a21b"}],"title":"bpf: Reject pkt arguments in mutating subprogs","x_generator":{"engine":"bippy-1.2.0"}}}}