{"id":"CVE-2026-45847","state":"PUBLISHED","title":"net: remove WARN_ON_ONCE when accessing forward path array","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE when accessing forward path array\n\nAlthough unlikely, recent support for IPIP tunnels increases chances of\nreaching this WARN_ON_ONCE if userspace manages to build a sufficiently\nlong forward path.\n\nRemove it.","publishedAt":"2026-05-27T12:15:07.344Z","updatedAt":"2026-05-27T12:15:07.344Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"548244c2f542aa0ad49453e9306e715a3877bc44","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"dcf9b3c90e5560339649d088836529883fb509f3","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"959ea349c7e2d4edf07b6838ca7e59345fe61a08","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"50422613185d505201167e8bdd2f2700790d5db6","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"a78d055ba7c31103ad02f8eceb0c452e154d2660","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"008e7a7c293b30bc43e4368dac6ea3808b75a572","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/dev.c"]}],"references":["https://git.kernel.org/stable/c/548244c2f542aa0ad49453e9306e715a3877bc44","https://git.kernel.org/stable/c/dcf9b3c90e5560339649d088836529883fb509f3","https://git.kernel.org/stable/c/9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6","https://git.kernel.org/stable/c/959ea349c7e2d4edf07b6838ca7e59345fe61a08","https://git.kernel.org/stable/c/50422613185d505201167e8bdd2f2700790d5db6","https://git.kernel.org/stable/c/a78d055ba7c31103ad02f8eceb0c452e154d2660","https://git.kernel.org/stable/c/008e7a7c293b30bc43e4368dac6ea3808b75a572"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45847.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45847","state":"PUBLISHED","datePublished":"2026-05-27T12:15:07.344Z","dateUpdated":"2026-05-27T12:15:07.344Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.078Z"},"containers":{"cna":{"title":"net: remove WARN_ON_ONCE when accessing forward path array","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE when accessing forward path array\n\nAlthough unlikely, recent support for IPIP tunnels increases chances of\nreaching this WARN_ON_ONCE if userspace manages to build a sufficiently\nlong forward path.\n\nRemove it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"548244c2f542aa0ad49453e9306e715a3877bc44","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"dcf9b3c90e5560339649d088836529883fb509f3","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"959ea349c7e2d4edf07b6838ca7e59345fe61a08","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"50422613185d505201167e8bdd2f2700790d5db6","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"a78d055ba7c31103ad02f8eceb0c452e154d2660","versionType":"git"},{"version":"ddb94eafab8b597b05904c8277194ea2d6357fa9","status":"affected","lessThan":"008e7a7c293b30bc43e4368dac6ea3808b75a572","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/dev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/548244c2f542aa0ad49453e9306e715a3877bc44"},{"url":"https://git.kernel.org/stable/c/dcf9b3c90e5560339649d088836529883fb509f3"},{"url":"https://git.kernel.org/stable/c/9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6"},{"url":"https://git.kernel.org/stable/c/959ea349c7e2d4edf07b6838ca7e59345fe61a08"},{"url":"https://git.kernel.org/stable/c/50422613185d505201167e8bdd2f2700790d5db6"},{"url":"https://git.kernel.org/stable/c/a78d055ba7c31103ad02f8eceb0c452e154d2660"},{"url":"https://git.kernel.org/stable/c/008e7a7c293b30bc43e4368dac6ea3808b75a572"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:15:07.344Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}