CVE-2026-97993

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97993", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.209Z", "datePublished": "2026-09-25T10:23:25.110Z", "dateUpdated": "2026-10-19T09:12:00.172Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:00.172Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx\n\nvhost_vdpa_set_config_call() swaps the eventfd_ctx_fdget() return value\ninto v->config_ctx before checking it, so on failure the field briefly\nholds an ERR_PTR:\n\n\tctx = fd == VHOST_FILE_UNBIND ? NULL : eventfd_ctx_fdget(fd);\n\tswap(ctx, v->config_ctx);\n\n\tif (!IS_ERR_OR_NULL(ctx))\n\t\teventfd_ctx_put(ctx);\n\n\tif (IS_ERR(v->config_ctx)) {\n\t\tlong ret = PTR_ERR(v->config_ctx);\n\n\t\tv->config_ctx = NULL;\n\t\treturn ret;\n\t}\n\nCommit 0bde59c1723a (\"vhost-vdpa: set v->config_ctx to NULL if\neventfd_ctx_fdget() fails\") added that clearing, and spelled out the\ninvariant the rest of the file relies on: \"we consider 'v->config_ctx'\nvalid if it is not NULL\". The window between the swap and the clearing\nstill breaks it. vhost_vdpa_config_cb() only tests for NULL, so a config\ninterrupt delivered inside the window hands the ERR_PTR to\neventfd_signal().\n\nCheck the fd before installing it instead. That closes the window and\nmatches how vhost_vring_ioctl() handles the same failure for the vq call\nfd.\n\nIt also stops a rejected fd from tearing down a config interrupt that was\nworking: until now the swap replaced the live context and put it, so\nafter an EBADF the device silently stopped delivering config interrupts\nuntil userspace installed a new fd."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/vhost/vdpa.c"], "versions": [{"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "e260dc9fbfdae0978e7a8698f977fbb463a657be", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "66e73fa18910b39fea0941dea5fe091122240855", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "4fde085eb839fbb39c25cbba5d2a091ded394877", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "59fc7c1c6b4d325194ca45352180340092d95098", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "388c678639a0cebfd936b3e56c64ac6a371efec2", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "6b20b40f020bde236f6b8a08ff88d8653261ec2b", "status": "affected", "versionType": "git"}, {"version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "e74a9fa50749b9940b4fb13199652325e08d3c4a", "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/vhost/vdpa.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "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": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "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": "5.8", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e260dc9fbfdae0978e7a8698f977fbb463a657be"}, {"url": "https://git.kernel.org/stable/c/66e73fa18910b39fea0941dea5fe091122240855"}, {"url": "https://git.kernel.org/stable/c/4fde085eb839fbb39c25cbba5d2a091ded394877"}, {"url": "https://git.kernel.org/stable/c/59fc7c1c6b4d325194ca45352180340092d95098"}, {"url": "https://git.kernel.org/stable/c/388c678639a0cebfd936b3e56c64ac6a371efec2"}, {"url": "https://git.kernel.org/stable/c/65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a"}, {"url": "https://git.kernel.org/stable/c/6b20b40f020bde236f6b8a08ff88d8653261ec2b"}, {"url": "https://git.kernel.org/stable/c/e74a9fa50749b9940b4fb13199652325e08d3c4a"}], "title": "vhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/vhost/vdpa.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e260dc9fbfdae0978e7a8698f977fbb463a657be", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "66e73fa18910b39fea0941dea5fe091122240855", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "4fde085eb839fbb39c25cbba5d2a091ded394877", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "59fc7c1c6b4d325194ca45352180340092d95098", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "388c678639a0cebfd936b3e56c64ac6a371efec2", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "6b20b40f020bde236f6b8a08ff88d8653261ec2b", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}, {"lessThan": "e74a9fa50749b9940b4fb13199652325e08d3c4a", "status": "affected", "version": "776f395004d829bbbf18c159ed9beb517a208c71", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/vhost/vdpa.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "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": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "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\nvhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx\n\nvhost_vdpa_set_config_call() swaps the eventfd_ctx_fdget() return value\ninto v->config_ctx before checking it, so on failure the field briefly\nholds an ERR_PTR:\n\n\tctx = fd == VHOST_FILE_UNBIND ? NULL : eventfd_ctx_fdget(fd);\n\tswap(ctx, v->config_ctx);\n\n\tif (!IS_ERR_OR_NULL(ctx))\n\t\teventfd_ctx_put(ctx);\n\n\tif (IS_ERR(v->config_ctx)) {\n\t\tlong ret = PTR_ERR(v->config_ctx);\n\n\t\tv->config_ctx = NULL;\n\t\treturn ret;\n\t}\n\nCommit 0bde59c1723a (\"vhost-vdpa: set v->config_ctx to NULL if\neventfd_ctx_fdget() fails\") added that clearing, and spelled out the\ninvariant the rest of the file relies on: \"we consider 'v->config_ctx'\nvalid if it is not NULL\". The window between the swap and the clearing\nstill breaks it. vhost_vdpa_config_cb() only tests for NULL, so a config\ninterrupt delivered inside the window hands the ERR_PTR to\neventfd_signal().\n\nCheck the fd before installing it instead. That closes the window and\nmatches how vhost_vring_ioctl() handles the same failure for the vq call\nfd.\n\nIt also stops a rejected fd from tearing down a config interrupt that was\nworking: until now the swap replaced the live context and put it, so\nafter an EBADF the device silently stopped delivering config interrupts\nuntil userspace installed a new fd."}], "id": "CVE-2026-97993", "lastModified": "2026-10-19T10:17:50.730", "metrics": {}, "published": "2026-09-25T11:17:27.500", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/388c678639a0cebfd936b3e56c64ac6a371efec2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4fde085eb839fbb39c25cbba5d2a091ded394877"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/59fc7c1c6b4d325194ca45352180340092d95098"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/66e73fa18910b39fea0941dea5fe091122240855"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b20b40f020bde236f6b8a08ff88d8653261ec2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e260dc9fbfdae0978e7a8698f977fbb463a657be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e74a9fa50749b9940b4fb13199652325e08d3c4a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: vhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx", "id": "2541314", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541314"}, "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-366", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nvhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx\nvhost_vdpa_set_config_call() swaps the eventfd_ctx_fdget() return value\ninto v->config_ctx before checking it, so on failure the field briefly\nholds an ERR_PTR:\nctx = fd == VHOST_FILE_UNBIND ? NULL : eventfd_ctx_fdget(fd);\nswap(ctx, v->config_ctx);\nif (!IS_ERR_OR_NULL(ctx))\neventfd_ctx_put(ctx);\nif (IS_ERR(v->config_ctx)) {\nlong ret = PTR_ERR(v->config_ctx);\nv->config_ctx = NULL;\nreturn ret;\n}\nCommit 0bde59c1723a (\"vhost-vdpa: set v->config_ctx to NULL if\neventfd_ctx_fdget() fails\") added that clearing, and spelled out the\ninvariant the rest of the file relies on: \"we consider 'v->config_ctx'\nvalid if it is not NULL\". The window between the swap and the clearing\nstill breaks it. vhost_vdpa_config_cb() only tests for NULL, so a config\ninterrupt delivered inside the window hands the ERR_PTR to\neventfd_signal().\nCheck the fd before installing it instead. That closes the window and\nmatches how vhost_vring_ioctl() handles the same failure for the vq call\nfd.\nIt also stops a rejected fd from tearing down a config interrupt that was\nworking: until now the swap replaced the live context and put it, so\nafter an EBADF the device silently stopped delivering config interrupts\nuntil userspace installed a new fd.", "A flaw was found in the Linux kernel's vhost-vdpa subsystem. A local attacker can cause a Denial of Service (DoS) by exploiting a race condition when updating interrupt configurations with an invalid file descriptor. Because the kernel temporarily installs an unvalidated error pointer into the device context, a concurrent interrupt can trigger an invalid pointer dereference and crash the system."], "name": "CVE-2026-97993", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "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-2026-97993\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97993\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97993.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[776f395004d829bbbf18c159ed9beb517a208c71,388c678639a0cebfd936b3e56c64ac6a371efec2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[776f395004d829bbbf18c159ed9beb517a208c71,65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[776f395004d829bbbf18c159ed9beb517a208c71,6b20b40f020bde236f6b8a08ff88d8653261ec2b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[776f395004d829bbbf18c159ed9beb517a208c71,e74a9fa50749b9940b4fb13199652325e08d3c4a)"}}], "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": "5.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc3,*]"}}], "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": "2026-09-25T15:30:06.908878+00:00", "updated": "2026-10-01T06:00:13.930761+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}