{ "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": "2026-10-16T15:20:47.684Z" }, "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" } ] } ] } ], "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", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-45959", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T15:18:37.644714Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:20:47.684Z" } } ] } }