CVE-2026-98048

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98048", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.072Z", "datePublished": "2026-09-25T10:23:57.956Z", "dateUpdated": "2026-10-21T12:54:15.043Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:54:15.043Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: don't rewrite bpf_fastcall patterns entered by a jump\n\nmark_fastcall_pattern_for_call() must ensure that matched\n\"spill; call; fill\" instruction series is not interrupted by a jump.\nOtherwise the rewrite applied by bpf_remove_fastcall_spills_fills()\nis not sound.\n\nRecord the instructions targeted by jumps in\ninsn_aux_data[*].jump_target when the CFG is built and use this flag\nto stop growing a pattern at such an instruction. Jumps to the first\nspill are fine.\n\nNote that existing insn_aux_data[*].jmp_point field can't be reused,\nas it marks subprogram return instructions."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/bpf_verifier.h", "kernel/bpf/cfg.c", "kernel/bpf/verifier.c"], "versions": [{"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "lessThan": "a0cd1c3ac63504ba3c50c01a00c11812919b619f", "status": "affected", "versionType": "git"}, {"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "lessThan": "c4d3bdb3ab211dcfad734b02e06fcb12adb4757f", "status": "affected", "versionType": "git"}, {"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "lessThan": "24adbc2c3bbe3385ce922587e1f8e837a68b3e25", "status": "affected", "versionType": "git"}, {"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "lessThan": "0b1c83dc3c4401cd7e846548f62e3caf3d06742e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/bpf_verifier.h", "kernel/bpf/cfg.c", "kernel/bpf/verifier.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "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": "6.12", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a0cd1c3ac63504ba3c50c01a00c11812919b619f"}, {"url": "https://git.kernel.org/stable/c/c4d3bdb3ab211dcfad734b02e06fcb12adb4757f"}, {"url": "https://git.kernel.org/stable/c/24adbc2c3bbe3385ce922587e1f8e837a68b3e25"}, {"url": "https://git.kernel.org/stable/c/0b1c83dc3c4401cd7e846548f62e3caf3d06742e"}], "title": "bpf: don't rewrite bpf_fastcall patterns entered by a jump", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/linux/bpf_verifier.h", "kernel/bpf/cfg.c", "kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a0cd1c3ac63504ba3c50c01a00c11812919b619f", "status": "affected", "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "versionType": "git"}, {"lessThan": "c4d3bdb3ab211dcfad734b02e06fcb12adb4757f", "status": "affected", "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "versionType": "git"}, {"lessThan": "24adbc2c3bbe3385ce922587e1f8e837a68b3e25", "status": "affected", "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "versionType": "git"}, {"lessThan": "0b1c83dc3c4401cd7e846548f62e3caf3d06742e", "status": "affected", "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/linux/bpf_verifier.h", "kernel/bpf/cfg.c", "kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "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\nbpf: don't rewrite bpf_fastcall patterns entered by a jump\n\nmark_fastcall_pattern_for_call() must ensure that matched\n\"spill; call; fill\" instruction series is not interrupted by a jump.\nOtherwise the rewrite applied by bpf_remove_fastcall_spills_fills()\nis not sound.\n\nRecord the instructions targeted by jumps in\ninsn_aux_data[*].jump_target when the CFG is built and use this flag\nto stop growing a pattern at such an instruction. Jumps to the first\nspill are fine.\n\nNote that existing insn_aux_data[*].jmp_point field can't be reused,\nas it marks subprogram return instructions."}], "id": "CVE-2026-98048", "lastModified": "2026-10-21T13:21:20.280", "metrics": {}, "published": "2026-09-25T11:17:33.663", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b1c83dc3c4401cd7e846548f62e3caf3d06742e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24adbc2c3bbe3385ce922587e1f8e837a68b3e25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a0cd1c3ac63504ba3c50c01a00c11812919b619f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c4d3bdb3ab211dcfad734b02e06fcb12adb4757f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: don't rewrite bpf_fastcall patterns entered by a jump", "id": "2541306", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541306"}, "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-843", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: don't rewrite bpf_fastcall patterns entered by a jump\nmark_fastcall_pattern_for_call() must ensure that matched\n\"spill; call; fill\" instruction series is not interrupted by a jump.\nOtherwise the rewrite applied by bpf_remove_fastcall_spills_fills()\nis not sound.\nRecord the instructions targeted by jumps in\ninsn_aux_data[*].jump_target when the CFG is built and use this flag\nto stop growing a pattern at such an instruction. Jumps to the first\nspill are fine.\nNote that existing insn_aux_data[*].jmp_point field can't be reused,\nas it marks subprogram return instructions.", "A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) verifier. This vulnerability may allow a local user to achieve privilege escalation or cause a Denial of Service (DoS) through memory corruption. During helper call optimizations, the verifier improperly rewrites instruction sequences that are entered by a jump instruction. A local attacker with permission to load BPF programs can exploit this issue by submitting a specially crafted program, triggering unsound instruction transformations that bypass safety checks."], "name": "CVE-2026-98048", "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": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not 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": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not 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": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98048\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98048\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98048.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5b5f51bff1b66cedb62b5ba74a1878341204e057,24adbc2c3bbe3385ce922587e1f8e837a68b3e25)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5b5f51bff1b66cedb62b5ba74a1878341204e057,0b1c83dc3c4401cd7e846548f62e3caf3d06742e)"}}], "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": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc2,*]"}}], "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": "2026-09-25T16:00:18.016854+00:00", "updated": "2026-10-01T01:45:16.941246+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}