{"api_version":"1","generated_at":"2026-10-22T02:29:54+00:00","cve":"CVE-2026-98380","urls":{"html":"https://cve.report/CVE-2026-98380","api":"https://cve.report/api/cve/CVE-2026-98380.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98380","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98380"},"summary":{"title":"net/sched: reject IDR error pointers when deleting actions","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: reject IDR error pointers when deleting actions\n\ntcf_action_delete() drops the reference held by its lookup before calling\ntcf_idr_delete_index() with the saved action index.  An unlocked\nclassifier can remove that action and reserve the same IDR slot with\nERR_PTR(-EBUSY) in between.\n\ntcf_idr_delete_index() only checks the lookup result for NULL.  It\ntherefore treats the reservation as a tc_action and dereferences\ntcfa_bindcnt.  A hardware execution breakpoint was used to schedule the\ninterleaving without changing the kernel source.  KASAN reported this\ndecoded trace:\n\n  BUG: KASAN: null-ptr-deref in tca_action_gd+0x5b9/0x1010\n  Read of size 4 at addr 0000000000000010 by task poc/150\n  Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002\n  RIP: tca_action_gd+0x5c0/0x1010:\n    arch_atomic_read at arch/x86/include/asm/atomic.h:23\n    raw_atomic_read at include/linux/atomic/atomic-arch-fallback.h:457\n    atomic_read at include/linux/atomic/atomic-instrumented.h:33\n    tcf_idr_delete_index at net/sched/act_api.c:766\n    tcf_action_delete at net/sched/act_api.c:1859\n    tcf_del_notify at net/sched/act_api.c:2014\n    tca_action_gd at net/sched/act_api.c:2064\n  R13: 0000000000000010 R15: fffffffffffffff0\n  Kernel panic - not syncing: Fatal exception\n\nR15 contains ERR_PTR(-EBUSY), and adding the tcfa_bindcnt offset produces\nthe address in R13.  With the guard applied, the same reproducer returned\n-ENOENT without a KASAN report or panic.  Treat error pointers as absent\nand return -ENOENT.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-09 08:16:56","updated_at":"2026-10-19 10:18:41"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/39b751a210bf61a374afa82749afc7a77a08bf1d","name":"https://git.kernel.org/stable/c/39b751a210bf61a374afa82749afc7a77a08bf1d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9551f26287debe6d8aa6e8841974661065b975f","name":"https://git.kernel.org/stable/c/a9551f26287debe6d8aa6e8841974661065b975f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd80a7519824b72c8fcfd3cc50cb93f7e2d90923","name":"https://git.kernel.org/stable/c/dd80a7519824b72c8fcfd3cc50cb93f7e2d90923","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/968550a439f64bd1a6c0d88efb92e4f082f84a26","name":"https://git.kernel.org/stable/c/968550a439f64bd1a6c0d88efb92e4f082f84a26","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/259caa711b7688365676442e2fdb286b8aceaa80","name":"https://git.kernel.org/stable/c/259caa711b7688365676442e2fdb286b8aceaa80","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6bf076258aac4e0af69ef317656c31ce6444d647","name":"https://git.kernel.org/stable/c/6bf076258aac4e0af69ef317656c31ce6444d647","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c82b797abe668d0b668601a93ba2c0b071a63574","name":"https://git.kernel.org/stable/c/c82b797abe668d0b668601a93ba2c0b071a63574","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6c9f07bf8800171de2cd3f02815cebe1f4d45f2d","name":"https://git.kernel.org/stable/c/6c9f07bf8800171de2cd3f02815cebe1f4d45f2d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98380","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98380","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 39b751a210bf61a374afa82749afc7a77a08bf1d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 dd80a7519824b72c8fcfd3cc50cb93f7e2d90923 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 6bf076258aac4e0af69ef317656c31ce6444d647 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 6c9f07bf8800171de2cd3f02815cebe1f4d45f2d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 259caa711b7688365676442e2fdb286b8aceaa80 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 968550a439f64bd1a6c0d88efb92e4f082f84a26 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 a9551f26287debe6d8aa6e8841974661065b975f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0190c1d452a91c38a3462abdd81752be1b9006a8 c82b797abe668d0b668601a93ba2c0b071a63574 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98380","cve":"CVE-2026-98380","epss":"0.001770000","percentile":"0.066850000","score_date":"2026-10-11","updated_at":"2026-10-12 00:13:21"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sched/act_api.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"39b751a210bf61a374afa82749afc7a77a08bf1d","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"dd80a7519824b72c8fcfd3cc50cb93f7e2d90923","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"6bf076258aac4e0af69ef317656c31ce6444d647","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"6c9f07bf8800171de2cd3f02815cebe1f4d45f2d","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"259caa711b7688365676442e2fdb286b8aceaa80","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"968550a439f64bd1a6c0d88efb92e4f082f84a26","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"a9551f26287debe6d8aa6e8841974661065b975f","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"},{"lessThan":"c82b797abe668d0b668601a93ba2c0b071a63574","status":"affected","version":"0190c1d452a91c38a3462abdd81752be1b9006a8","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/sched/act_api.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.19"},{"lessThan":"4.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: reject IDR error pointers when deleting actions\n\ntcf_action_delete() drops the reference held by its lookup before calling\ntcf_idr_delete_index() with the saved action index.  An unlocked\nclassifier can remove that action and reserve the same IDR slot with\nERR_PTR(-EBUSY) in between.\n\ntcf_idr_delete_index() only checks the lookup result for NULL.  It\ntherefore treats the reservation as a tc_action and dereferences\ntcfa_bindcnt.  A hardware execution breakpoint was used to schedule the\ninterleaving without changing the kernel source.  KASAN reported this\ndecoded trace:\n\n  BUG: KASAN: null-ptr-deref in tca_action_gd+0x5b9/0x1010\n  Read of size 4 at addr 0000000000000010 by task poc/150\n  Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002\n  RIP: tca_action_gd+0x5c0/0x1010:\n    arch_atomic_read at arch/x86/include/asm/atomic.h:23\n    raw_atomic_read at include/linux/atomic/atomic-arch-fallback.h:457\n    atomic_read at include/linux/atomic/atomic-instrumented.h:33\n    tcf_idr_delete_index at net/sched/act_api.c:766\n    tcf_action_delete at net/sched/act_api.c:1859\n    tcf_del_notify at net/sched/act_api.c:2014\n    tca_action_gd at net/sched/act_api.c:2064\n  R13: 0000000000000010 R15: fffffffffffffff0\n  Kernel panic - not syncing: Fatal exception\n\nR15 contains ERR_PTR(-EBUSY), and adding the tcfa_bindcnt offset produces\nthe address in R13.  With the guard applied, the same reproducer returned\n-ENOENT without a KASAN report or panic.  Treat error pointers as absent\nand return -ENOENT."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:18:31.007Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/39b751a210bf61a374afa82749afc7a77a08bf1d"},{"url":"https://git.kernel.org/stable/c/dd80a7519824b72c8fcfd3cc50cb93f7e2d90923"},{"url":"https://git.kernel.org/stable/c/6bf076258aac4e0af69ef317656c31ce6444d647"},{"url":"https://git.kernel.org/stable/c/6c9f07bf8800171de2cd3f02815cebe1f4d45f2d"},{"url":"https://git.kernel.org/stable/c/259caa711b7688365676442e2fdb286b8aceaa80"},{"url":"https://git.kernel.org/stable/c/968550a439f64bd1a6c0d88efb92e4f082f84a26"},{"url":"https://git.kernel.org/stable/c/a9551f26287debe6d8aa6e8841974661065b975f"},{"url":"https://git.kernel.org/stable/c/c82b797abe668d0b668601a93ba2c0b071a63574"}],"title":"net/sched: reject IDR error pointers when deleting actions","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98380","datePublished":"2026-10-09T07:34:20.218Z","dateReserved":"2026-09-25T10:25:14.345Z","dateUpdated":"2026-10-19T09:18:31.007Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-09 08:16:56","lastModifiedDate":"2026-10-19 10:18:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98380","Ordinal":"1","Title":"net/sched: reject IDR error pointers when deleting actions","CVE":"CVE-2026-98380","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98380","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: reject IDR error pointers when deleting actions\n\ntcf_action_delete() drops the reference held by its lookup before calling\ntcf_idr_delete_index() with the saved action index.  An unlocked\nclassifier can remove that action and reserve the same IDR slot with\nERR_PTR(-EBUSY) in between.\n\ntcf_idr_delete_index() only checks the lookup result for NULL.  It\ntherefore treats the reservation as a tc_action and dereferences\ntcfa_bindcnt.  A hardware execution breakpoint was used to schedule the\ninterleaving without changing the kernel source.  KASAN reported this\ndecoded trace:\n\n  BUG: KASAN: null-ptr-deref in tca_action_gd+0x5b9/0x1010\n  Read of size 4 at addr 0000000000000010 by task poc/150\n  Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002\n  RIP: tca_action_gd+0x5c0/0x1010:\n    arch_atomic_read at arch/x86/include/asm/atomic.h:23\n    raw_atomic_read at include/linux/atomic/atomic-arch-fallback.h:457\n    atomic_read at include/linux/atomic/atomic-instrumented.h:33\n    tcf_idr_delete_index at net/sched/act_api.c:766\n    tcf_action_delete at net/sched/act_api.c:1859\n    tcf_del_notify at net/sched/act_api.c:2014\n    tca_action_gd at net/sched/act_api.c:2064\n  R13: 0000000000000010 R15: fffffffffffffff0\n  Kernel panic - not syncing: Fatal exception\n\nR15 contains ERR_PTR(-EBUSY), and adding the tcfa_bindcnt offset produces\nthe address in R13.  With the guard applied, the same reproducer returned\n-ENOENT without a KASAN report or panic.  Treat error pointers as absent\nand return -ENOENT.","Type":"Description","Title":"net/sched: reject IDR error pointers when deleting actions"}]}}}