CVE-2026-53055

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53055", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.381Z", "datePublished": "2026-06-24T16:30:00.876Z", "dateUpdated": "2026-08-05T12:32:59.383Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:32:59.383Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: hisilicon/sec2 - prevent req used-after-free for sec\n\nDuring packet transmission, if the system is under heavy load,\nthe hardware might complete processing the packet and free the\nrequest memory (req) before the transmission function finishes.\nIf the software subsequently accesses this req, a use-after-free\nerror will occur. The qp_ctx memory exists throughout the packet\nsending process, so replace the req with the qp_ctx."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - In the highest reasonable deployment, SEC2 is selected as the async AEAD provider for in-kernel network crypto such as kTLS AES-GCM/CCM, where remote TLS records reach `crypto_aead_decrypt()` and then the vulnerable SEC2 send path. AF_ALG also provides a local path, but the network-triggered kTLS/ESP-style path is the higher defensible attack vector.\nAC:L - The bug is a request use-after-free after hardware submission, and an attacker can drive many asynchronous crypto requests by sending repeated records/packets to create the completion-before-return window. No special condition outside attacker-influenced load and request timing is required for triggering.\nPR:N - A remote client can reach the vulnerable crypto operation through a network service using kTLS without any local account or kernel capability. The attacker only needs to establish/send traffic to the service, not authenticate to the host as a privileged user.\nUI:N - No victim user action is required once the vulnerable kernel and service configuration are present. The attacker triggers processing by sending network traffic.\nS:U - The vulnerable component and impacted resources are within the same kernel security authority. This is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The flaw is a use-after-free of a crypto request object, and reclaimed object contents can influence stale pointer dereferences. Under the required conservative scoring rule, this supports potential kernel memory disclosure or broader exploitation.\nI:H - The stale `req->ctx->sec` pointer chain is used for an atomic counter update after free, giving a plausible memory corruption/write primitive if the freed request is reclaimed. As a UAF in kernel heap memory, it is scored as high integrity impact.\nA:H - Even without full exploitation, dereferencing freed request memory can cause kernel oops, panic, or service-disrupting memory corruption. The trigger can be repeated with continued traffic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/crypto/hisilicon/sec2/sec_crypto.c"], "versions": [{"version": "f0ae287c50455f7be0d8dd45a803d403c7aa4d2e", "lessThan": "b375c3c7209cc59e40e97998aa9bc768369cca0e", "status": "affected", "versionType": "git"}, {"version": "f0ae287c50455f7be0d8dd45a803d403c7aa4d2e", "lessThan": "ad73563f3a1edbfddf2724136c6a15826b354e18", "status": "affected", "versionType": "git"}, {"version": "f0ae287c50455f7be0d8dd45a803d403c7aa4d2e", "lessThan": "67b53a660e6bf0da2fa8d8872e897a14d8059eaf", "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/crypto/hisilicon/sec2/sec_crypto.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "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": "6.17", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b375c3c7209cc59e40e97998aa9bc768369cca0e"}, {"url": "https://git.kernel.org/stable/c/ad73563f3a1edbfddf2724136c6a15826b354e18"}, {"url": "https://git.kernel.org/stable/c/67b53a660e6bf0da2fa8d8872e897a14d8059eaf"}], "title": "crypto: hisilicon/sec2 - prevent req used-after-free for sec", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/crypto/hisilicon/sec2/sec_crypto.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b375c3c7209cc59e40e97998aa9bc768369cca0e", "status": "affected", "version": "f0ae287c50455f7be0d8dd45a803d403c7aa4d2e", "versionType": "git"}, {"lessThan": "ad73563f3a1edbfddf2724136c6a15826b354e18", "status": "affected", "version": "f0ae287c50455f7be0d8dd45a803d403c7aa4d2e", "versionType": "git"}, {"lessThan": "67b53a660e6bf0da2fa8d8872e897a14d8059eaf", "status": "affected", "version": "f0ae287c50455f7be0d8dd45a803d403c7aa4d2e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/crypto/hisilicon/sec2/sec_crypto.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.17"}, {"lessThan": "6.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.33", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4F0E1027-1081-4E2B-9D56-AF79BAFF146B", "versionEndExcluding": "6.18.33", "versionStartIncluding": "6.17", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A13475D2-59BF-4716-94B5-7C1D239A2CF4", "versionEndExcluding": "7.0.10", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: hisilicon/sec2 - prevent req used-after-free for sec\n\nDuring packet transmission, if the system is under heavy load,\nthe hardware might complete processing the packet and free the\nrequest memory (req) before the transmission function finishes.\nIf the software subsequently accesses this req, a use-after-free\nerror will occur. The qp_ctx memory exists throughout the packet\nsending process, so replace the req with the qp_ctx."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncrypto: hisilicon/sec2 - prevenir uso despu\u00e9s de liberaci\u00f3n de req para sec\n\nDurante la transmisi\u00f3n de paquetes, si el sistema est\u00e1 bajo carga pesada,\nel hardware podr\u00eda completar el procesamiento del paquete y liberar la\nmemoria de la solicitud (req) antes de que la funci\u00f3n de transmisi\u00f3n finalice.\nSi el software accede posteriormente a este req, ocurrir\u00e1 un error de uso despu\u00e9s de liberaci\u00f3n.\nLa memoria qp_ctx existe durante todo el proceso de env\u00edo de paquetes, as\u00ed que reemplace el req con el qp_ctx."}], "id": "CVE-2026-53055", "lastModified": "2026-10-25T22:10:00.150", "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"}]}, "published": "2026-06-24T17:17:17.527", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/67b53a660e6bf0da2fa8d8872e897a14d8059eaf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ad73563f3a1edbfddf2724136c6a15826b354e18"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b375c3c7209cc59e40e97998aa9bc768369cca0e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: crypto: hisilicon/sec2 - prevent req used-after-free for sec", "id": "2492312", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492312"}, "csaw": false, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncrypto: hisilicon/sec2 - prevent req used-after-free for sec\nDuring packet transmission, if the system is under heavy load,\nthe hardware might complete processing the packet and free the\nrequest memory (req) before the transmission function finishes.\nIf the software subsequently accesses this req, a use-after-free\nerror will occur. The qp_ctx memory exists throughout the packet\nsending process, so replace the req with the qp_ctx.", "A flaw was found in the Linux kernel's `hisilicon/sec2` cryptographic module. Under heavy system load during packet transmission, the hardware may free request memory before the software completes its processing. This can lead to a use-after-free error when the software attempts to access the freed memory, potentially resulting in system instability or a denial of service."], "name": "CVE-2026-53055", "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": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53055\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53055\nhttps://lore.kernel.org/linux-cve-announce/2026062400-CVE-2026-53055-6f65@gregkh/T"]}

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