CVE-2026-68334

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68334", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.383Z", "datePublished": "2026-08-10T12:03:10.538Z", "dateUpdated": "2026-08-17T05:03:33.108Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:03:33.108Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\n\nrxrpc_wake_up_io_thread() checks local->io_thread before waking it, but\nthen reloads the pointer for wake_up_process().\n\nlocal->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\n\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rxrpc/ar-internal.h"], "versions": [{"version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "lessThan": "c9165e199f56997f2f2deb5d3ec2dfab98dfa288", "status": "affected", "versionType": "git"}, {"version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "lessThan": "092b42cf3f6013eec43607ecbcad674723649514", "status": "affected", "versionType": "git"}, {"version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "lessThan": "745fb794c3e933c023af9dbb5876a5e16ad2dc71", "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/rxrpc/ar-internal.h"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "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": "6.16", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288"}, {"url": "https://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514"}, {"url": "https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71"}], "title": "rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/rxrpc/ar-internal.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c9165e199f56997f2f2deb5d3ec2dfab98dfa288", "status": "affected", "version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "versionType": "git"}, {"lessThan": "092b42cf3f6013eec43607ecbcad674723649514", "status": "affected", "version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "versionType": "git"}, {"lessThan": "745fb794c3e933c023af9dbb5876a5e16ad2dc71", "status": "affected", "version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/rxrpc/ar-internal.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "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\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\n\nrxrpc_wake_up_io_thread() checks local->io_thread before waking it, but\nthen reloads the pointer for wake_up_process().\n\nlocal->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\n\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does."}], "id": "CVE-2026-68334", "lastModified": "2026-08-17T06:17:41.510", "metrics": {}, "published": "2026-08-10T13:20:23.750", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: `rxrpc` race condition causes Denial of Service", "id": "2513370", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513370"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/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:\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\nrxrpc_wake_up_io_thread() checks local->io_thread before waking it, but\nthen reloads the pointer for wake_up_process().\nlocal->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does.", "A flaw was found in the Linux kernel's `rxrpc` component. A race condition in the `rxrpc_wake_up_io_thread()` function could lead to a null pointer dereference. This occurs when the `io_thread` pointer is checked and then reloaded, and if the I/O thread exits between these operations, the second load can result in a null value. This vulnerability could cause a system crash, leading to a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "Update to a kernel version containing the fix (6.18.42+ or 7.1.6+)."}, "name": "CVE-2026-68334", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "vim", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "vim", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "vim", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "vim", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "vim", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T12:03:10Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68334\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68334\nhttps://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514\nhttps://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71\nhttps://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288"], "statement": "This vulnerability has been assessed as Moderate impact. The race condition in rxrpc_wake_up_io_thread() was introduced in upstream kernel version 6.16.0. Red Hat Enterprise Linux is not affected, as the newest RHEL kernel (6.12.x in RHEL 10) predates the introduction of the vulnerable code.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5800b1cf3fd8ccab752a101865be1e76dac33142,c9165e199f56997f2f2deb5d3ec2dfab98dfa288)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5800b1cf3fd8ccab752a101865be1e76dac33142,092b42cf3f6013eec43607ecbcad674723649514)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5800b1cf3fd8ccab752a101865be1e76dac33142,745fb794c3e933c023af9dbb5876a5e16ad2dc71)"}}], "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": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-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": "2026-08-10T16:00:04.017303+00:00", "updated": "2026-08-13T18:00:04.128255+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}