CVE-2026-74400

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74400", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.892Z", "datePublished": "2026-08-15T05:59:11.450Z", "dateUpdated": "2026-08-17T05:18:40.094Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:18:40.094Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix crash in bpf_[set|remove]_dentry_xattr for negative dentries\n\nbpf_set_dentry_xattr and bpf_remove_dentry_xattr BPF kfuncs attempt to\nlock the inode of the supplied dentry without checking if it is\nNULL. If a negative dentry is passed (e.g. from\nsecurity_inode_create), d_inode(dentry) returns NULL, and\ninode_lock(inode) will cause a NULL pointer dereference.\n\nTrivially fix this by adding a NULL check for inode before attempting\nto lock it, returning -EINVAL if it is NULL.\n\nAdditionally, drop WARN_ON(!inode) in bpf_xattr_read_permission() and\nbpf_xattr_write_permission(). These warnings could be triggered by\npassing a negative dentry to bpf_get_dentry_xattr() or the _locked\nvariants of the xattr kfuncs, potentially causing a Denial of Service\non systems with panic_on_warn enabled. Instead, simply return -EINVAL."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/bpf_fs_kfuncs.c"], "versions": [{"version": "56467292794b800164df20c076c409ac548e56ec", "lessThan": "e003f3a4be738f650e283e92d07017c3fef8da52", "status": "affected", "versionType": "git"}, {"version": "56467292794b800164df20c076c409ac548e56ec", "lessThan": "0160edf2af51c5fde742973742c5d10497901b21", "status": "affected", "versionType": "git"}, {"version": "56467292794b800164df20c076c409ac548e56ec", "lessThan": "07410646f6ff1d23222f105ccab778957d401bbe", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/bpf_fs_kfuncs.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.15", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e003f3a4be738f650e283e92d07017c3fef8da52"}, {"url": "https://git.kernel.org/stable/c/0160edf2af51c5fde742973742c5d10497901b21"}, {"url": "https://git.kernel.org/stable/c/07410646f6ff1d23222f105ccab778957d401bbe"}], "title": "bpf: fix crash in bpf_[set|remove]_dentry_xattr for negative dentries", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/bpf_fs_kfuncs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e003f3a4be738f650e283e92d07017c3fef8da52", "status": "affected", "version": "56467292794b800164df20c076c409ac548e56ec", "versionType": "git"}, {"lessThan": "0160edf2af51c5fde742973742c5d10497901b21", "status": "affected", "version": "56467292794b800164df20c076c409ac548e56ec", "versionType": "git"}, {"lessThan": "07410646f6ff1d23222f105ccab778957d401bbe", "status": "affected", "version": "56467292794b800164df20c076c409ac548e56ec", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/bpf_fs_kfuncs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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: fix crash in bpf_[set|remove]_dentry_xattr for negative dentries\n\nbpf_set_dentry_xattr and bpf_remove_dentry_xattr BPF kfuncs attempt to\nlock the inode of the supplied dentry without checking if it is\nNULL. If a negative dentry is passed (e.g. from\nsecurity_inode_create), d_inode(dentry) returns NULL, and\ninode_lock(inode) will cause a NULL pointer dereference.\n\nTrivially fix this by adding a NULL check for inode before attempting\nto lock it, returning -EINVAL if it is NULL.\n\nAdditionally, drop WARN_ON(!inode) in bpf_xattr_read_permission() and\nbpf_xattr_write_permission(). These warnings could be triggered by\npassing a negative dentry to bpf_get_dentry_xattr() or the _locked\nvariants of the xattr kfuncs, potentially causing a Denial of Service\non systems with panic_on_warn enabled. Instead, simply return -EINVAL."}], "id": "CVE-2026-74400", "lastModified": "2026-08-17T06:19:35.183", "metrics": {}, "published": "2026-08-15T06:22:42.030", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0160edf2af51c5fde742973742c5d10497901b21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07410646f6ff1d23222f105ccab778957d401bbe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e003f3a4be738f650e283e92d07017c3fef8da52"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: fix crash in bpf_[set|remove]_dentry_xattr for negative dentries", "id": "2516909", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516909"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: fix crash in bpf_[set|remove]_dentry_xattr for negative dentries\nbpf_set_dentry_xattr and bpf_remove_dentry_xattr BPF kfuncs attempt to\nlock the inode of the supplied dentry without checking if it is\nNULL. If a negative dentry is passed (e.g. from\nsecurity_inode_create), d_inode(dentry) returns NULL, and\ninode_lock(inode) will cause a NULL pointer dereference.\nTrivially fix this by adding a NULL check for inode before attempting\nto lock it, returning -EINVAL if it is NULL.\nAdditionally, drop WARN_ON(!inode) in bpf_xattr_read_permission() and\nbpf_xattr_write_permission(). These warnings could be triggered by\npassing a negative dentry to bpf_get_dentry_xattr() or the _locked\nvariants of the xattr kfuncs, potentially causing a Denial of Service\non systems with panic_on_warn enabled. Instead, simply return -EINVAL.", "A flaw was found in the Linux kernel. The BPF (Berkeley Packet Filter) kfuncs `bpf_set_dentry_xattr` and `bpf_remove_dentry_xattr` do not properly check for a null inode when handling negative dentries. This oversight can lead to a null pointer dereference. Additionally, warnings in `bpf_xattr_read_permission()` and `bpf_xattr_write_permission()` could be triggered by similar conditions. On systems configured with `panic_on_warn`, this vulnerability could result in a Denial of Service (DoS)."], "name": "CVE-2026-74400", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74400\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74400\nhttps://lore.kernel.org/linux-cve-announce/2026081508-CVE-2026-74400-efe2@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[56467292794b800164df20c076c409ac548e56ec,e003f3a4be738f650e283e92d07017c3fef8da52)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[56467292794b800164df20c076c409ac548e56ec,0160edf2af51c5fde742973742c5d10497901b21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[56467292794b800164df20c076c409ac548e56ec,07410646f6ff1d23222f105ccab778957d401bbe)"}}], "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": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T14:00:08.921540+00:00", "updated": "2026-08-22T00:30:16.949448+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}