CVE-2026-45988

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no crossing of a VM, IOMMU, or sandbox boundary is involved.\nC:H - The CHALLENGE-path refcount underflow frees the `rxrpc_connection` while still referenced; a UAF lets an attacker reallocate and read controlled freed-object contents, enabling kernel memory disclosure.\nI:H - The same use-after-free / refcount-underflow on the connection object enables heap grooming and write primitives over the freed structure, allowing kernel memory/control-flow corruption.\nA:H - The double-put UAF and the re-decryption of partially-decrypted RESPONSE packets reliably oops/panic the kernel and abort connections, causing a 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/conn_event.c"], "versions": [{"version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "d61482be4aae1835b78875761206241835a7510e", "status": "affected", "versionType": "git"}, {"version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "7b89868305052b94a91b708c462bc2281fa42a4a", "status": "affected", "versionType": "git"}, {"version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "76cb9a2d252274adfae6e293a292434631a7d472", "status": "affected", "versionType": "git"}, {"version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "f55b383070170e988e4dec28be2af1714d258521", "status": "affected", "versionType": "git"}, {"version": "17926a79320afa9b95df6b977b40cca6d8713cea", "lessThan": "0422e7a4883f25101903f3e8105c0808aa5f4ce9", "status": "affected", "versionType": "git"}]}, {"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/conn_event.c"], "versions": [{"version": "2.6.22", "status": "affected"}, {"version": "0", "lessThan": "2.6.22", "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": "2.6.22", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d61482be4aae1835b78875761206241835a7510e"}, {"url": "https://git.kernel.org/stable/c/7b89868305052b94a91b708c462bc2281fa42a4a"}, {"url": "https://git.kernel.org/stable/c/76cb9a2d252274adfae6e293a292434631a7d472"}, {"url": "https://git.kernel.org/stable/c/f55b383070170e988e4dec28be2af1714d258521"}, {"url": "https://git.kernel.org/stable/c/0422e7a4883f25101903f3e8105c0808aa5f4ce9"}], "title": "rxrpc: Fix re-decryption of RESPONSE packets", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-45988", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:18:47.821756Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-682", "description": "CWE-682 Incorrect Calculation"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:26:41.147Z"}}]}}

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Similarly, discard an\nincoming CHALLENGE packet if we get an error whilst generating a RESPONSE;\nthe server will send another CHALLENGE."}], "id": "CVE-2026-45988", "lastModified": "2026-10-19T20:18:23.480", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45988", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:18:47.821756Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:16.270", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0422e7a4883f25101903f3e8105c0808aa5f4ce9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/76cb9a2d252274adfae6e293a292434631a7d472"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7b89868305052b94a91b708c462bc2281fa42a4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d61482be4aae1835b78875761206241835a7510e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f55b383070170e988e4dec28be2af1714d258521"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-682"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: rxrpc: Fix re-decryption of RESPONSE packets", "id": "2482123", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482123"}, "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-372", "details": ["A flaw was found in the Linux kernel's rxrpc subsystem. When an rxrpc RESPONSE packet experiences a temporary processing failure, it may enter a partially decrypted state and be re-queued for another attempt. This incorrect handling of partially decrypted packets could lead to communication disruptions or resource exhaustion within the rxrpc subsystem, potentially impacting the availability of services relying on rxrpc."], "name": "CVE-2026-45988", "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": "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"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45988\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45988\nhttps://lore.kernel.org/linux-cve-announce/2026052739-CVE-2026-45988-40f9@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17926a79320afa9b95df6b977b40cca6d8713cea,d61482be4aae1835b78875761206241835a7510e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17926a79320afa9b95df6b977b40cca6d8713cea,7b89868305052b94a91b708c462bc2281fa42a4a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17926a79320afa9b95df6b977b40cca6d8713cea,76cb9a2d252274adfae6e293a292434631a7d472)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17926a79320afa9b95df6b977b40cca6d8713cea,f55b383070170e988e4dec28be2af1714d258521)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17926a79320afa9b95df6b977b40cca6d8713cea,0422e7a4883f25101903f3e8105c0808aa5f4ce9)"}}], "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": "semver", "value": "2.6.22"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.22)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.86,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.27,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.4,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-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": "2026-05-27T17:15:38.212089+00:00", "updated": "2026-10-19T23:30:05.619587+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-372", "CWE-682"]}