{"id":"CVE-2026-98793","state":"PUBLISHED","title":"netfilter: bpf: reject invalid NAT manipulation types","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bpf: reject invalid NAT manipulation types\n\nAs bpf_ct_set_nat_info() is not validating the NAT manipulation type a\nwrong value can be passed directly to nf_nat_setup_info(). This triggers\nthe WARN_ON() at nf_nat_setup_info() and if panic_on_warn isn't set,\nthen IPS_SRC_NAT_DONE is set without adding nat_bysource and conntrack\ncleanup tries to unlink an uninitialized hlist node.\n\nFix this by checking that NAT manipulation type is correct before\ncalling nf_nat_setup_info(). In addition, if the WARN_ON is hit, return\nNF_DROP instead of continuing with the processing to avoid similar\nsituations in the future.","publishedAt":"2026-10-18T15:48:33.555Z","updatedAt":"2026-10-30T12:39:51.633Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"752492947be3123ea6c689e2f93ae04ecd675d42","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"f6143ae109df56d51d5536e813deb19eee7a6205","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"58108f05b0502448f6bb612ee2eccc63bd6449cb","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"16d464013ec2267b00a83f4bfbb97b3ecc63bfa7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_bpf.c","net/netfilter/nf_nat_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_bpf.c","net/netfilter/nf_nat_core.c"]}],"references":["https://git.kernel.org/stable/c/ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e","https://git.kernel.org/stable/c/752492947be3123ea6c689e2f93ae04ecd675d42","https://git.kernel.org/stable/c/ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058","https://git.kernel.org/stable/c/f6143ae109df56d51d5536e813deb19eee7a6205","https://git.kernel.org/stable/c/58108f05b0502448f6bb612ee2eccc63bd6449cb","https://git.kernel.org/stable/c/16d464013ec2267b00a83f4bfbb97b3ecc63bfa7"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98793.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98793","state":"PUBLISHED","datePublished":"2026-10-18T15:48:33.555Z","dateUpdated":"2026-10-30T12:39:51.633Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.370Z"},"containers":{"cna":{"title":"netfilter: bpf: reject invalid NAT manipulation types","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bpf: reject invalid NAT manipulation types\n\nAs bpf_ct_set_nat_info() is not validating the NAT manipulation type a\nwrong value can be passed directly to nf_nat_setup_info(). This triggers\nthe WARN_ON() at nf_nat_setup_info() and if panic_on_warn isn't set,\nthen IPS_SRC_NAT_DONE is set without adding nat_bysource and conntrack\ncleanup tries to unlink an uninitialized hlist node.\n\nFix this by checking that NAT manipulation type is correct before\ncalling nf_nat_setup_info(). In addition, if the WARN_ON is hit, return\nNF_DROP instead of continuing with the processing to avoid similar\nsituations in the future."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"752492947be3123ea6c689e2f93ae04ecd675d42","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"f6143ae109df56d51d5536e813deb19eee7a6205","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"58108f05b0502448f6bb612ee2eccc63bd6449cb","versionType":"git"},{"version":"0fabd2aa199faeb8754aee94658f2c48ccb2c8c3","status":"affected","lessThan":"16d464013ec2267b00a83f4bfbb97b3ecc63bfa7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_bpf.c","net/netfilter/nf_nat_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_bpf.c","net/netfilter/nf_nat_core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e"},{"url":"https://git.kernel.org/stable/c/752492947be3123ea6c689e2f93ae04ecd675d42"},{"url":"https://git.kernel.org/stable/c/ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058"},{"url":"https://git.kernel.org/stable/c/f6143ae109df56d51d5536e813deb19eee7a6205"},{"url":"https://git.kernel.org/stable/c/58108f05b0502448f6bb612ee2eccc63bd6449cb"},{"url":"https://git.kernel.org/stable/c/16d464013ec2267b00a83f4bfbb97b3ecc63bfa7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:39:51.633Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}