CVE-2026-89539

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89539", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.721Z", "datePublished": "2026-09-11T19:44:16.699Z", "dateUpdated": "2026-10-30T12:32:05.658Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:32:05.658Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: reject duplicate CREDS_VALUE options\n\ngssx_dec_option_array() walks the wire-supplied option array and, for\nevery entry whose name matches CREDS_VALUE, calls\ngssx_dec_linux_creds() on the same struct svc_cred. That helper\nunconditionally installs a fresh groups_alloc() result into\ncreds->cr_group_info without releasing whatever pointer was already\nthere:\n\n for (i = 0; i < count; i++) {\n ... decode name ...\n if (length == sizeof(CREDS_VALUE) &&\n memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) {\n err = gssx_dec_linux_creds(xdr, creds);\n ...\n }\n }\n\nA reply that carries two CREDS_VALUE entries therefore overwrites\ncr_group_info on the second iteration and orphans the group_info\nallocated by the first call. The earlier free_creds path only\nreleases the last cr_group_info via free_svc_cred(), so the first\nallocation's refcount stays at one and its kvmalloc-backed storage\nis leaked. No in-tree caller of gssp_accept_sec_context_upcall()\nexpects more than one CREDS_VALUE per reply.\n\nFix by tracking whether a CREDS_VALUE option has already been\ndecoded and returning -EINVAL on any subsequent match, so the\nfree_creds path releases the single group_info that was installed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/auth_gss/gss_rpc_xdr.c"], "versions": [{"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "6207d7df96b3a7f507f0bfc8842b3760ee2fb1f8", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "4904d61eb2e2bd484000725fd302b8f37b4fcf3a", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "64b9ef369a6f723294613cb129e5f62c35429df5", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "4b5ebb4f91a6152a0f7b1253f701197e5710d4da", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "f615b884310bf82d0014e3b5a92eb9aa88146685", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "7a1d0501cbb962beba23377035d667bf3c1726ee", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "9d94f046b23de0f77849ea69133063c949297e30", "status": "affected", "versionType": "git"}, {"version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "2e4ce62385c1b8a887c5370af058ac7b52a8eaf9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/auth_gss/gss_rpc_xdr.c"], "versions": [{"version": "3.10", "status": "affected"}, {"version": "0", "lessThan": "3.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "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": "3.10", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6207d7df96b3a7f507f0bfc8842b3760ee2fb1f8"}, {"url": "https://git.kernel.org/stable/c/4904d61eb2e2bd484000725fd302b8f37b4fcf3a"}, {"url": "https://git.kernel.org/stable/c/64b9ef369a6f723294613cb129e5f62c35429df5"}, {"url": "https://git.kernel.org/stable/c/4b5ebb4f91a6152a0f7b1253f701197e5710d4da"}, {"url": "https://git.kernel.org/stable/c/f615b884310bf82d0014e3b5a92eb9aa88146685"}, {"url": "https://git.kernel.org/stable/c/7a1d0501cbb962beba23377035d667bf3c1726ee"}, {"url": "https://git.kernel.org/stable/c/9d94f046b23de0f77849ea69133063c949297e30"}, {"url": "https://git.kernel.org/stable/c/2e4ce62385c1b8a887c5370af058ac7b52a8eaf9"}], "title": "SUNRPC: reject duplicate CREDS_VALUE options", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sunrpc/auth_gss/gss_rpc_xdr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6207d7df96b3a7f507f0bfc8842b3760ee2fb1f8", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "4904d61eb2e2bd484000725fd302b8f37b4fcf3a", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "64b9ef369a6f723294613cb129e5f62c35429df5", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "4b5ebb4f91a6152a0f7b1253f701197e5710d4da", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "f615b884310bf82d0014e3b5a92eb9aa88146685", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "7a1d0501cbb962beba23377035d667bf3c1726ee", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "9d94f046b23de0f77849ea69133063c949297e30", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}, {"lessThan": "2e4ce62385c1b8a887c5370af058ac7b52a8eaf9", "status": "affected", "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sunrpc/auth_gss/gss_rpc_xdr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.10"}, {"lessThan": "3.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "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\nSUNRPC: reject duplicate CREDS_VALUE options\n\ngssx_dec_option_array() walks the wire-supplied option array and, for\nevery entry whose name matches CREDS_VALUE, calls\ngssx_dec_linux_creds() on the same struct svc_cred. That helper\nunconditionally installs a fresh groups_alloc() result into\ncreds->cr_group_info without releasing whatever pointer was already\nthere:\n\n for (i = 0; i < count; i++) {\n ... decode name ...\n if (length == sizeof(CREDS_VALUE) &&\n memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) {\n err = gssx_dec_linux_creds(xdr, creds);\n ...\n }\n }\n\nA reply that carries two CREDS_VALUE entries therefore overwrites\ncr_group_info on the second iteration and orphans the group_info\nallocated by the first call. The earlier free_creds path only\nreleases the last cr_group_info via free_svc_cred(), so the first\nallocation's refcount stays at one and its kvmalloc-backed storage\nis leaked. No in-tree caller of gssp_accept_sec_context_upcall()\nexpects more than one CREDS_VALUE per reply.\n\nFix by tracking whether a CREDS_VALUE option has already been\ndecoded and returning -EINVAL on any subsequent match, so the\nfree_creds path releases the single group_info that was installed."}], "id": "CVE-2026-89539", "lastModified": "2026-10-30T13:20:20.120", "metrics": {}, "published": "2026-09-11T20:19:36.977", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e4ce62385c1b8a887c5370af058ac7b52a8eaf9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4904d61eb2e2bd484000725fd302b8f37b4fcf3a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b5ebb4f91a6152a0f7b1253f701197e5710d4da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6207d7df96b3a7f507f0bfc8842b3760ee2fb1f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64b9ef369a6f723294613cb129e5f62c35429df5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a1d0501cbb962beba23377035d667bf3c1726ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d94f046b23de0f77849ea69133063c949297e30"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f615b884310bf82d0014e3b5a92eb9aa88146685"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: SUNRPC memory leak due to duplicate CREDS_VALUE options", "id": "2532304", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532304"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nSUNRPC: reject duplicate CREDS_VALUE options\ngssx_dec_option_array() walks the wire-supplied option array and, for\nevery entry whose name matches CREDS_VALUE, calls\ngssx_dec_linux_creds() on the same struct svc_cred. That helper\nunconditionally installs a fresh groups_alloc() result into\ncreds->cr_group_info without releasing whatever pointer was already\nthere:\nfor (i = 0; i < count; i++) {\n... decode name ...\nif (length == sizeof(CREDS_VALUE) &&\nmemcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) {\nerr = gssx_dec_linux_creds(xdr, creds);\n...\n}\n}\nA reply that carries two CREDS_VALUE entries therefore overwrites\ncr_group_info on the second iteration and orphans the group_info\nallocated by the first call. The earlier free_creds path only\nreleases the last cr_group_info via free_svc_cred(), so the first\nallocation's refcount stays at one and its kvmalloc-backed storage\nis leaked. No in-tree caller of gssp_accept_sec_context_upcall()\nexpects more than one CREDS_VALUE per reply.\nFix by tracking whether a CREDS_VALUE option has already been\ndecoded and returning -EINVAL on any subsequent match, so the\nfree_creds path releases the single group_info that was installed.", "A flaw was found in the SUNRPC subsystem of the Linux kernel. The `gssx_dec_option_array()` function, responsible for decoding options, does not correctly handle replies containing duplicate `CREDS_VALUE` entries. This oversight causes the system to allocate memory for credentials multiple times without releasing previous allocations, leading to a memory leak. A remote attacker could exploit this to consume system resources."], "name": "CVE-2026-89539", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:44:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89539\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89539\nhttps://git.kernel.org/stable/c/2e4ce62385c1b8a887c5370af058ac7b52a8eaf9\nhttps://git.kernel.org/stable/c/7a1d0501cbb962beba23377035d667bf3c1726ee\nhttps://git.kernel.org/stable/c/9d94f046b23de0f77849ea69133063c949297e30\nhttps://git.kernel.org/stable/c/f615b884310bf82d0014e3b5a92eb9aa88146685"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d658336b05f8697d6445834f8867f8ad5e4f735,f615b884310bf82d0014e3b5a92eb9aa88146685)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d658336b05f8697d6445834f8867f8ad5e4f735,7a1d0501cbb962beba23377035d667bf3c1726ee)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d658336b05f8697d6445834f8867f8ad5e4f735,9d94f046b23de0f77849ea69133063c949297e30)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d658336b05f8697d6445834f8867f8ad5e4f735,2e4ce62385c1b8a887c5370af058ac7b52a8eaf9)"}}], "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": "generic", "value": "3.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"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": "2026-09-12T07:15:10.615068+00:00", "updated": "2026-09-21T01:30:08.748553+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}