CVE-2026-98380

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98380", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.345Z", "datePublished": "2026-10-09T07:34:20.218Z", "dateUpdated": "2026-10-19T09:18:31.007Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:18:31.007Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/act_api.c"], "versions": [{"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "39b751a210bf61a374afa82749afc7a77a08bf1d", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "dd80a7519824b72c8fcfd3cc50cb93f7e2d90923", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "6bf076258aac4e0af69ef317656c31ce6444d647", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "6c9f07bf8800171de2cd3f02815cebe1f4d45f2d", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "259caa711b7688365676442e2fdb286b8aceaa80", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "968550a439f64bd1a6c0d88efb92e4f082f84a26", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "a9551f26287debe6d8aa6e8841974661065b975f", "status": "affected", "versionType": "git"}, {"version": "0190c1d452a91c38a3462abdd81752be1b9006a8", "lessThan": "c82b797abe668d0b668601a93ba2c0b071a63574", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/act_api.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"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:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-98380", "lastModified": "2026-10-19T10:18:41.317", "metrics": {}, "published": "2026-10-09T08:16:56.400", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/259caa711b7688365676442e2fdb286b8aceaa80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/39b751a210bf61a374afa82749afc7a77a08bf1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6bf076258aac4e0af69ef317656c31ce6444d647"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6c9f07bf8800171de2cd3f02815cebe1f4d45f2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/968550a439f64bd1a6c0d88efb92e4f082f84a26"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a9551f26287debe6d8aa6e8841974661065b975f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c82b797abe668d0b668601a93ba2c0b071a63574"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd80a7519824b72c8fcfd3cc50cb93f7e2d90923"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net/sched: reject IDR error pointers when deleting actions", "id": "2548391", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548391"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-253", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: reject IDR error pointers when deleting actions\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.\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:\nBUG: KASAN: null-ptr-deref in tca_action_gd+0x5b9/0x1010\nRead of size 4 at addr 0000000000000010 by task poc/150\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000002\nRIP: tca_action_gd+0x5c0/0x1010:\narch_atomic_read at arch/x86/include/asm/atomic.h:23\nraw_atomic_read at include/linux/atomic/atomic-arch-fallback.h:457\natomic_read at include/linux/atomic/atomic-instrumented.h:33\ntcf_idr_delete_index at net/sched/act_api.c:766\ntcf_action_delete at net/sched/act_api.c:1859\ntcf_del_notify at net/sched/act_api.c:2014\ntca_action_gd at net/sched/act_api.c:2064\nR13: 0000000000000010 R15: fffffffffffffff0\nKernel panic - not syncing: Fatal exception\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.", "A flaw was found in the Linux kernel's traffic control subsystem. A local attacker with network configuration privileges can exploit a race condition during traffic control action deletion to cause a Denial of Service (DoS) by crashing the system. Due to missing error validation during action cleanup, the kernel treats an error indicator as a valid action structure, leading to an invalid memory access and a kernel panic."], "name": "CVE-2026-98380", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98380\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98380\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98380.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,39b751a210bf61a374afa82749afc7a77a08bf1d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,dd80a7519824b72c8fcfd3cc50cb93f7e2d90923)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,6bf076258aac4e0af69ef317656c31ce6444d647)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,6c9f07bf8800171de2cd3f02815cebe1f4d45f2d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,259caa711b7688365676442e2fdb286b8aceaa80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,968550a439f64bd1a6c0d88efb92e4f082f84a26)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,a9551f26287debe6d8aa6e8841974661065b975f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0190c1d452a91c38a3462abdd81752be1b9006a8,c82b797abe668d0b668601a93ba2c0b071a63574)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.271,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.222,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.189,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.158,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.112,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.55,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.9,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-09T09:30:03.361983+00:00", "updated": "2026-10-11T05:00:12.515559+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}