CVE-2026-80924

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80924", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.802Z", "datePublished": "2026-09-09T16:19:44.150Z", "dateUpdated": "2026-10-19T08:45:08.269Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:45:08.269Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: krb5 - use kfree_sensitive() for derived key buffers\n\ncrypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum()\nfree the buffer holding the freshly derived keys with plain kfree(),\nleaving the key material behind in the freed slab object."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - crypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum() run from nfsd RPCSEC_GSS on TCP/2049, from in-kernel RxGK handshake processing of remote RESPONSE packets (rxgk_extract_token/rxgk_set_up_token_cipher), and from Ceph/AFS network-filesystem security, so a remote peer can cause derived Kerberos keys to be left in freed slab.\nAC:L - Each prepare path derives Ke/Ki/Kc into a kmalloc buffer then frees it with plain kfree(); the leftover is deterministic on every GSS/RxGK/Ceph context setup, with no race or attacker-uncontrollable memory layout required to leave the keys in the slab.\nPR:N - RxGK token-cipher setup runs while decrypting the authentication token, before the token or authenticator is verified, and nfsd RPCSEC_GSS INIT is the authentication handshake; a network peer needs no local Linux account or capability to drive these pre-auth paths.\nUI:N - A Kerberos NFS server or RxRPC/AFS endpoint automatically processes incoming GSS/RxGK handshake packets; no victim mount, click, or other interactive action is required at exploit time.\nS:U - Leftover keys remain in host-kernel slab; this is ordinary kernel information disclosure within the same security authority, not a VM escape, IOMMU bypass, or sandbox breakout.\nC:H - The freed buffers hold complete derived Kerberos encryption and integrity keys (Ke/Ki/Kc, up to 32-byte AES-256 material). Recovering them from reused slab yields full session-key disclosure for NFS, AFS, Ceph, or RxGK traffic.\nI:N - The bug only fails to wipe key material before kfree(); it does not corrupt kernel memory, provide a write primitive, or hijack control flow.\nA:N - Replacing kfree() with kfree_sensitive() does not affect control flow; the plain kfree() path does not oops, deadlock, leak allocator objects, or otherwise impact availability."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/krb5/krb5_api.c"], "versions": [{"version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "lessThan": "731a5b6fb4c1705f9405d9029dd64ea81e336207", "status": "affected", "versionType": "git"}, {"version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "lessThan": "91b96dc9cc250cd16751f53de525cf3442ca0962", "status": "affected", "versionType": "git"}, {"version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "lessThan": "a1bf79365794783b19f5b09e8a23f7ee311e8931", "status": "affected", "versionType": "git"}, {"version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "lessThan": "f7d53dd3f267e46a784f219a75072f2f400d42b9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/krb5/krb5_api.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.49", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.13", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.3", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.15", "versionEndExcluding": "6.18.49"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/731a5b6fb4c1705f9405d9029dd64ea81e336207"}, {"url": "https://git.kernel.org/stable/c/91b96dc9cc250cd16751f53de525cf3442ca0962"}, {"url": "https://git.kernel.org/stable/c/a1bf79365794783b19f5b09e8a23f7ee311e8931"}, {"url": "https://git.kernel.org/stable/c/f7d53dd3f267e46a784f219a75072f2f400d42b9"}], "title": "crypto: krb5 - use kfree_sensitive() for derived key buffers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["crypto/krb5/krb5_api.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "731a5b6fb4c1705f9405d9029dd64ea81e336207", "status": "affected", "version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "versionType": "git"}, {"lessThan": "91b96dc9cc250cd16751f53de525cf3442ca0962", "status": "affected", "version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "versionType": "git"}, {"lessThan": "a1bf79365794783b19f5b09e8a23f7ee311e8931", "status": "affected", "version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "versionType": "git"}, {"lessThan": "f7d53dd3f267e46a784f219a75072f2f400d42b9", "status": "affected", "version": "3936f02bf2d3308a7359dd37dd96cd60603d8170", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["crypto/krb5/krb5_api.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.49", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.13", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: krb5 - use kfree_sensitive() for derived key buffers\n\ncrypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum()\nfree the buffer holding the freshly derived keys with plain kfree(),\nleaving the key material behind in the freed slab object."}], "id": "CVE-2026-80924", "lastModified": "2026-10-19T09:17:23.320", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-09T17:17:47.653", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/731a5b6fb4c1705f9405d9029dd64ea81e336207"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91b96dc9cc250cd16751f53de525cf3442ca0962"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1bf79365794783b19f5b09e8a23f7ee311e8931"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f7d53dd3f267e46a784f219a75072f2f400d42b9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3936f02bf2d3308a7359dd37dd96cd60603d8170,731a5b6fb4c1705f9405d9029dd64ea81e336207)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3936f02bf2d3308a7359dd37dd96cd60603d8170,91b96dc9cc250cd16751f53de525cf3442ca0962)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3936f02bf2d3308a7359dd37dd96cd60603d8170,a1bf79365794783b19f5b09e8a23f7ee311e8931)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3936f02bf2d3308a7359dd37dd96cd60603d8170,f7d53dd3f267e46a784f219a75072f2f400d42b9)"}}], "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": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.49,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.13,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.3,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-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": "2026-09-09T18:30:13.707686+00:00", "updated": "2026-09-11T16:15:05.018662+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-241"]}