{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-45959",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.089Z",
        "datePublished": "2026-05-27T12:18:16.039Z",
        "dateUpdated": "2026-08-05T12:28:57.463Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:28:57.463Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp - Fix a crash due to incorrect cleanup usage of kfree\n\nAnnotating a local pointer variable, which will be assigned with the\nkmalloc-family functions, with the `__cleanup(kfree)` attribute will\nmake the address of the local variable, rather than the address returned\nby kmalloc, passed to kfree directly and lead to a crash due to invalid\ndeallocation of stack address. According to other places in the repo,\nthe correct usage should be `__free(kfree)`. The code coincidentally\ncompiled because the parameter type `void *` of kfree is compatible with\nthe desired type `struct { ... } **`."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable AES-GCM path is reached through the local AF_ALG crypto socket interface (socket/bind/sendmsg syscalls), explicitly selectable via the \"gcm-aes-ccp\" driver name; there is no remote network peer required in the reliable trigger path.\nAC:L - The incorrect cleanup fires on every return from ccp_run_aes_gcm_cmd, so a single AES-GCM operation deterministically triggers the invalid free with no race, timing, or memory-layout condition the attacker must defeat.\nPR:L - Creating an AF_ALG socket and submitting a gcm(aes) request requires only a basic unprivileged local account with no capability; no root or special privilege is needed.\nUI:N - The attacker submits the crypto request entirely on its own; no victim action or separate user interaction is required.\nS:U - The invalid free corrupts and crashes within the kernel's own security authority and crosses no VM, sandbox, or IOMMU boundary.\nC:H - This is an invalid free (memory-corruption class, not a NULL deref); per UAF/corruption guidance the allocator's mishandling of the stack pointer can disturb slab state and freed-object contents, which can be leveraged toward information disclosure.\nI:H - Feeding kfree a stack address drives the SLUB allocator to write freelist pointers / drop refcounts on memory it never owned, a corruption primitive that per UAF/double-free guidance can be leveraged into a write affecting control flow.\nA:H - The bug deterministically passes a stack address to kfree on every invocation, causing an immediate kernel oops/panic (DoS) that any unprivileged local user can trigger repeatedly."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/crypto/ccp/ccp-ops.c"
                    ],
                    "versions": [
                        {
                            "version": "a71475582ada92ba021852bf3c2b40ab3718549b",
                            "lessThan": "9a3ace9b010ffd8c422c97844ae152f7c53d6b18",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a71475582ada92ba021852bf3c2b40ab3718549b",
                            "lessThan": "90f9090e3e744a8fe3bb6fa0e61f577347728b0b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a71475582ada92ba021852bf3c2b40ab3718549b",
                            "lessThan": "d5abcc33ee76bc26d58b39dc1a097e43a99dd438",
                            "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/ccp/ccp-ops.c"
                    ],
                    "versions": [
                        {
                            "version": "6.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.14",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.4",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.18.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "6.19.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.0"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9a3ace9b010ffd8c422c97844ae152f7c53d6b18"
                },
                {
                    "url": "https://git.kernel.org/stable/c/90f9090e3e744a8fe3bb6fa0e61f577347728b0b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d5abcc33ee76bc26d58b39dc1a097e43a99dd438"
                }
            ],
            "title": "crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree",
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                "engine": "bippy-1.2.0"
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}