CVE-2026-98724

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98724", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.366Z", "datePublished": "2026-10-18T15:47:01.614Z", "dateUpdated": "2026-10-19T09:24:34.979Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:24:34.979Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: pci-epf: reject too-short SGL segments\n\nThe host controls an SGL segment's length. A nonzero length smaller than\none SGL descriptor makes nr_descs zero, so\nnvmet_pci_epf_get_sgl_segment() reads the type byte of sgls[-1] outside\nthe allocated buffer. If that byte contains a segment descriptor type,\nthe function also copies the preceding 16 bytes and returns a negative\ndescriptor count.\n\nThe read was reproduced in 3/3 KASAN boots with only the host transfer\nmocked by a KUnit test:\n\n BUG: KASAN: slab-out-of-bounds in nvmet_pci_epf_get_sgl_segment\n Read of size 1 by task kunit_try_catch\n Call Trace:\n nvmet_pci_epf_get_sgl_segment\n nvmet_pci_epf_short_sgl_test\n Kernel panic - not syncing: KASAN: panic_on_warn set ...\n\nReject segments that cannot hold one descriptor before allocating or\ntransferring their contents."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/pci-epf.c"], "versions": [{"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "2423a05dd0f21330c47ce0ae1cb54a8b0be821e2", "status": "affected", "versionType": "git"}, {"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "472df1d103dbe3e9d09156f0667e36180e912c46", "status": "affected", "versionType": "git"}, {"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/pci-epf.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "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": "6.14", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2423a05dd0f21330c47ce0ae1cb54a8b0be821e2"}, {"url": "https://git.kernel.org/stable/c/472df1d103dbe3e9d09156f0667e36180e912c46"}, {"url": "https://git.kernel.org/stable/c/5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9"}], "title": "nvmet: pci-epf: reject too-short SGL segments", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/pci-epf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2423a05dd0f21330c47ce0ae1cb54a8b0be821e2", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}, {"lessThan": "472df1d103dbe3e9d09156f0667e36180e912c46", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}, {"lessThan": "5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/pci-epf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "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\nnvmet: pci-epf: reject too-short SGL segments\n\nThe host controls an SGL segment's length. A nonzero length smaller than\none SGL descriptor makes nr_descs zero, so\nnvmet_pci_epf_get_sgl_segment() reads the type byte of sgls[-1] outside\nthe allocated buffer. If that byte contains a segment descriptor type,\nthe function also copies the preceding 16 bytes and returns a negative\ndescriptor count.\n\nThe read was reproduced in 3/3 KASAN boots with only the host transfer\nmocked by a KUnit test:\n\n BUG: KASAN: slab-out-of-bounds in nvmet_pci_epf_get_sgl_segment\n Read of size 1 by task kunit_try_catch\n Call Trace:\n nvmet_pci_epf_get_sgl_segment\n nvmet_pci_epf_short_sgl_test\n Kernel panic - not syncing: KASAN: panic_on_warn set ...\n\nReject segments that cannot hold one descriptor before allocating or\ntransferring their contents."}], "id": "CVE-2026-98724", "lastModified": "2026-10-19T10:19:36.590", "metrics": {}, "published": "2026-10-18T16:17:26.020", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2423a05dd0f21330c47ce0ae1cb54a8b0be821e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/472df1d103dbe3e9d09156f0667e36180e912c46"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvmet: pci-epf: reject too-short SGL segments", "id": "2555180", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555180"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvmet: pci-epf: reject too-short SGL segments\nThe host controls an SGL segment's length. A nonzero length smaller than\none SGL descriptor makes nr_descs zero, so\nnvmet_pci_epf_get_sgl_segment() reads the type byte of sgls[-1] outside\nthe allocated buffer. If that byte contains a segment descriptor type,\nthe function also copies the preceding 16 bytes and returns a negative\ndescriptor count.\nThe read was reproduced in 3/3 KASAN boots with only the host transfer\nmocked by a KUnit test:\nBUG: KASAN: slab-out-of-bounds in nvmet_pci_epf_get_sgl_segment\nRead of size 1 by task kunit_try_catch\nCall Trace:\nnvmet_pci_epf_get_sgl_segment\nnvmet_pci_epf_short_sgl_test\nKernel panic - not syncing: KASAN: panic_on_warn set ...\nReject segments that cannot hold one descriptor before allocating or\ntransferring their contents.", "A flaw was found in the Linux kernel's Non-Volatile Memory Express (NVMe) target PCI endpoint function driver. When processing a Scatter-Gather List (SGL) segment whose length is shorter than a single descriptor, the system fails to properly validate the segment size. A connected host can exploit this vulnerability by submitting a malformed SGL segment, triggering an out-of-bounds memory read. This issue primarily allows an attacker to cause a kernel crash leading to a Denial of Service (DoS), or potentially expose sensitive memory contents."], "name": "CVE-2026-98724", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Not 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": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98724\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98724\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98724.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,2423a05dd0f21330c47ce0ae1cb54a8b0be821e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,472df1d103dbe3e9d09156f0667e36180e912c46)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9)"}}], "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": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc6,*]"}}], "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": "2026-10-18T19:30:14.461211+00:00", "updated": "2026-10-23T08:45:16.392124+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}