CVE-2026-46085

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Further, remove the\nWARN_ON_ONCE() so that it can't be remotely triggered (a trace line can\nstill be emitted)."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - rxrpc is the UDP-based AFS RPC protocol; the vulnerable code processes DATA packets received from a remote network peer, and AFS cells routinely traverse the internet.\nAC:L - The attacker fully controls the DATA payload length (UDP datagram size minus headers) and can reliably set it to a non-multiple of 8; the rxkad checksum does not cover the data length, so the misaligned packet reliably reaches the crypto path.\nPR:N - An on-path attacker modifying an in-flight packet, or a malicious server the victim client connects to, needs no credentials or privileges on the target system since the 16-bit checksum gate is independent of the data length.\nUI:N - Received DATA packets are decrypted/verified automatically during normal call processing; tampering with packets of an existing connection requires no victim action.\nS:U - The triggered WARN/panic is contained within the kernel's own security authority and crosses no privilege or virtualization boundary.\nC:N - The bug only causes a crypto error path to WARN; no kernel memory is read or disclosed to the remote attacker.\nI:N - No memory is corrupted or modified\u2014the misaligned length is rejected by the cipher, so there is no write primitive or data tampering.\nA:H - The remotely-triggerable WARN_ON_ONCE causes a kernel panic on the common panic_on_warn configuration, yielding a full denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/trace/events/rxrpc.h", "net/rxrpc/rxkad.c"], "versions": [{"version": "9853917f9edf08efb0b55c26d9eb8340f126d9e9", "lessThan": "f1c6bd0cc786a8fa74829ce3c4b3673944a308f4", "status": "affected", "versionType": "git"}, {"version": "e9c369d58785044427450350ad32d6a2497fb379", "lessThan": "440d20d95e844b657a93a0b2dcc2aae155efdce6", "status": "affected", "versionType": "git"}, {"version": "bf4d6e4a6856eedeb7f66eb91224115bfff4e2cb", "lessThan": "f0d3efd03b2a9e0f1ffa6df8fcb264af3d494286", "status": "affected", "versionType": "git"}, {"version": "f93af41b9f5f798823d0d0fb8765c2a936d76270", "lessThan": "af9271eb666d07b6f65612dc160a47f7cb5220ed", "status": "affected", "versionType": "git"}, {"version": "f93af41b9f5f798823d0d0fb8765c2a936d76270", "lessThan": "def304aae2edf321d2671fd6ca766a93c21f877e", "status": "affected", "versionType": "git"}, {"version": "5cdf57eda01a1ffaeb61ac39ec4dcc94a690431e", "status": "affected", "versionType": "git"}, {"version": "6.6.135", "lessThan": "6.6.140", "status": "affected", "versionType": "semver"}, {"version": "6.12.82", "lessThan": "6.12.86", "status": "affected", "versionType": "semver"}, {"version": "6.18.23", "lessThan": "6.18.27", "status": "affected", "versionType": "semver"}, {"version": "6.19.13", "lessThan": "6.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/trace/events/rxrpc.h", "net/rxrpc/rxkad.c"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.6.135", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.82", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.23", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f1c6bd0cc786a8fa74829ce3c4b3673944a308f4"}, {"url": "https://git.kernel.org/stable/c/440d20d95e844b657a93a0b2dcc2aae155efdce6"}, {"url": "https://git.kernel.org/stable/c/f0d3efd03b2a9e0f1ffa6df8fcb264af3d494286"}, {"url": "https://git.kernel.org/stable/c/af9271eb666d07b6f65612dc160a47f7cb5220ed"}, {"url": "https://git.kernel.org/stable/c/def304aae2edf321d2671fd6ca766a93c21f877e"}], "title": "rxrpc: Fix rxkad crypto unalignment handling", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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Also handle\nnon-ENOMEM errors from decryption by aborting. Further, remove the\nWARN_ON_ONCE() so that it can't be remotely triggered (a trace line can\nstill be emitted)."}], "id": "CVE-2026-46085", "lastModified": "2026-06-24T17:12:04.360", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-27T14:17:29.963", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/440d20d95e844b657a93a0b2dcc2aae155efdce6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af9271eb666d07b6f65612dc160a47f7cb5220ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/def304aae2edf321d2671fd6ca766a93c21f877e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f0d3efd03b2a9e0f1ffa6df8fcb264af3d494286"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f1c6bd0cc786a8fa74829ce3c4b3673944a308f4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: rxrpc: Fix rxkad crypto unalignment handling", "id": "2482142", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482142"}, "csaw": false, "cwe": "CWE-1284", "details": ["A flaw was found in the Linux kernel's rxrpc subsystem, specifically in the rxkad crypto unalignment handling. A remote attacker could send a specially crafted packet with a misaligned crypto length. This improper handling could lead to system instability or a denial of service (DoS) due to incorrect decryption error handling and the removal of a remotely triggerable warning mechanism."], "name": "CVE-2026-46085", "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"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46085\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46085\nhttps://lore.kernel.org/linux-cve-announce/2026052701-CVE-2026-46085-4a40@gregkh/T"]}

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