CVE-2026-45959

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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"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:26:40.585Z"}}]}}

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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"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:18:39.052Z"}, "title": "CISA ADP Vulnrichment"}]}}

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{"bugzilla": {"description": "kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree", "id": "2481948", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481948"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-763", "details": ["A flaw was found in the Linux kernel's crypto: ccp module. An incorrect cleanup usage of the `kfree` function, which is used for memory deallocation, with a local pointer variable could lead to an invalid deallocation of a stack address. This issue can result in a system crash, causing a Denial of Service (DoS)."], "name": "CVE-2026-45959", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2026-45959\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45959\nhttps://lore.kernel.org/linux-cve-announce/2026052733-CVE-2026-45959-5456@gregkh/T"], "threat_severity": "Moderate"}

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