GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-89538 (GCVE-0-2026-89538)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-14 12:00
VLAI
Title
SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field
Summary
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field gss_krb5_unwrap_v2() sets buf->len to a logical length, which can be much smaller than head[0].iov_len (the allocated receive-page capacity). It then calls xdr_buf_trim() with a trim length derived from the 16-bit "extra count" (ec) field in the Kerberos v2 token header. The ec field is authenticated by the post-decrypt memcmp() against the encrypted header copy, so a randomly-mutated value is rejected. However, any peer holding a valid GSS context can legitimately encrypt a token whose ec exceeds the plaintext length. Per RFC 4121, such a token is structurally malformed. Although xdr_buf_trim() now clamps the buf->len subtraction to avoid unsigned underflow, the buffer is still left in a semantically invalid state (zero length, inconsistent iov lengths) when ec is oversized. Reject these tokens before calling xdr_buf_trim(), giving callers a well-defined GSS_S_DEFECTIVE_TOKEN error and keeping the xdr_buf internally consistent. The wrapped blob begins at a nonzero offset -- both callers pass len as offset + opaque_len -- so buf->len still counts the offset bytes that precede the blob. Compare the trim length against the remaining wrapped segment, buf->len - offset, rather than the whole buffer; comparing against buf->len alone leaves an offset-wide window in which an oversized ec passes the test and xdr_buf_trim() cuts into the bytes ahead of the blob.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < ac9efc29346b6942e71f0e24a3178a9121330fab (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < b5746095b59f4d11f39f08751d36bbdfd1e5deac (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < 9fc6d6e6db49ab55208d5dd1c424c1d0d9aa7296 (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < 4abb44a29bb515df6f49123848765c70fc9b5021 (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < dfcd81ab45613d45996fbf483d4ef54b0ec90ab9 (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < 1f9856af065b6158271687e9788407b9573fd16f (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < 880effc943ed82d6811f272ed3307c222b40f4d6 (git)
Affected: cf4c024b908353fcc48309374d39e3399d67dfd1 , < ad484748eec0a66eac0f13ab53b3fbedb7333c91 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/auth_gss/gss_krb5_wrap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ac9efc29346b6942e71f0e24a3178a9121330fab",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "b5746095b59f4d11f39f08751d36bbdfd1e5deac",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "9fc6d6e6db49ab55208d5dd1c424c1d0d9aa7296",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "4abb44a29bb515df6f49123848765c70fc9b5021",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "dfcd81ab45613d45996fbf483d4ef54b0ec90ab9",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "1f9856af065b6158271687e9788407b9573fd16f",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "880effc943ed82d6811f272ed3307c222b40f4d6",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            },
            {
              "lessThan": "ad484748eec0a66eac0f13ab53b3fbedb7333c91",
              "status": "affected",
              "version": "cf4c024b908353fcc48309374d39e3399d67dfd1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/auth_gss/gss_krb5_wrap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Reject krb5 v2 wrap tokens with oversized ec field\n\ngss_krb5_unwrap_v2() sets buf-\u003elen to a logical\nlength, which can be much smaller than head[0].iov_len\n(the allocated receive-page capacity).  It then calls\nxdr_buf_trim() with a trim length derived from the 16-bit\n\"extra count\" (ec) field in the Kerberos v2 token header.\n\nThe ec field is authenticated by the post-decrypt memcmp()\nagainst the encrypted header copy, so a randomly-mutated\nvalue is rejected.  However, any peer holding a valid GSS\ncontext can legitimately encrypt a token whose ec exceeds\nthe plaintext length.  Per RFC 4121, such a token is\nstructurally malformed.\n\nAlthough xdr_buf_trim() now clamps the buf-\u003elen subtraction\nto avoid unsigned underflow, the buffer is still left in a\nsemantically invalid state (zero length, inconsistent iov\nlengths) when ec is oversized.\n\nReject these tokens before calling xdr_buf_trim(), giving\ncallers a well-defined GSS_S_DEFECTIVE_TOKEN error and\nkeeping the xdr_buf internally consistent.  The wrapped blob\nbegins at a nonzero offset -- both callers pass len as\noffset + opaque_len -- so buf-\u003elen still counts the offset\nbytes that precede the blob.  Compare the trim length\nagainst the remaining wrapped segment, buf-\u003elen - offset,\nrather than the whole buffer; comparing against buf-\u003elen\nalone leaves an offset-wide window in which an oversized ec\npasses the test and xdr_buf_trim() cuts into the bytes ahead\nof the blob."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - gss_krb5_unwrap_v2() is reached from nfsd RPCSEC_GSS privacy unwrap on TCP/2049 and from the NFS client\u0027s gss_unwrap_resp_priv() on every krb5p reply, so a remote NFS peer delivers the oversized-ec wrap token over the network.\nAC:L - A peer holding the GSS session keys can encrypt a RFC 4121 wrap token whose authenticated ec exceeds the plaintext; decrypt and the header memcmp succeed, then xdr_buf_trim() runs with that chosen length and no race or layout outside attacker control.\nPR:N - A malicious or compromised NFS server that already shares a krb5p GSS context needs no account or capability on the victim client; ordinary krb5p replies and NFSv4.0 GSS callbacks are processed without local privileges on that host.\nUI:N - Once a krb5p NFS mount exists, the client unwraps every privacy-protected reply and NFSv4.0 GSS callback with no further mount, click, or open; idle revalidations and server-driven callbacks are sufficient.\nS:U - The corrupted xdr_buf and subsequent XDR decode and shift run in the host kernel that processed the RPC and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - An oversized ec makes xdr_buf_trim() underflow buf-\u003elen toward UINT_MAX, so later xdr_read_pages/xdr_shrink_bufhead use that length as a copy bound and read far past the receive buffer into adjacent kernel memory.\nI:H - xdr_shrink_bufhead() then calls xdr_buf_head_shift_right() with a near-UINT_MAX length derived from the wrapped buf-\u003elen, an out-of-bounds write into kernel memory that can be used for control-flow hijacking.\nA:H - Those unbounded XDR copies and the inconsistent xdr_buf (wrapped or zero length versus iov_lens) oops or panic nfsd or the NFS client, and the peer can repeat the request at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:46.153Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ac9efc29346b6942e71f0e24a3178a9121330fab"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5746095b59f4d11f39f08751d36bbdfd1e5deac"
        },
        {
          "url": "https://git.kernel.org/stable/c/9fc6d6e6db49ab55208d5dd1c424c1d0d9aa7296"
        },
        {
          "url": "https://git.kernel.org/stable/c/4abb44a29bb515df6f49123848765c70fc9b5021"
        },
        {
          "url": "https://git.kernel.org/stable/c/dfcd81ab45613d45996fbf483d4ef54b0ec90ab9"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f9856af065b6158271687e9788407b9573fd16f"
        },
        {
          "url": "https://git.kernel.org/stable/c/880effc943ed82d6811f272ed3307c222b40f4d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad484748eec0a66eac0f13ab53b3fbedb7333c91"
        }
      ],
      "title": "SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89538",
    "datePublished": "2026-09-11T19:44:15.953Z",
    "dateReserved": "2026-09-11T19:38:34.721Z",
    "dateUpdated": "2026-09-14T12:00:46.153Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-89538",
      "date": "2026-09-14",
      "epss": "0.00626",
      "percentile": "0.48108"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-13T01:01:29.000Z",
      "cve": "CVE-2026-89538",
      "id": "msrc_CVE-2026-89538",
      "initial_release_date": "2026-09-13T01:01:29.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89538.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89538\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-11T20:19:36.850\",\"lastModified\":\"2026-09-14T13:19:08.870\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nSUNRPC: Reject krb5 v2 wrap tokens with oversized ec field\\n\\ngss_krb5_unwrap_v2() sets buf-\u003elen to a logical\\nlength, which can be much smaller than head[0].iov_len\\n(the allocated receive-page capacity).  It then calls\\nxdr_buf_trim() with a trim length derived from the 16-bit\\n\\\"extra count\\\" (ec) field in the Kerberos v2 token header.\\n\\nThe ec field is authenticated by the post-decrypt memcmp()\\nagainst the encrypted header copy, so a randomly-mutated\\nvalue is rejected.  However, any peer holding a valid GSS\\ncontext can legitimately encrypt a token whose ec exceeds\\nthe plaintext length.  Per RFC 4121, such a token is\\nstructurally malformed.\\n\\nAlthough xdr_buf_trim() now clamps the buf-\u003elen subtraction\\nto avoid unsigned underflow, the buffer is still left in a\\nsemantically invalid state (zero length, inconsistent iov\\nlengths) when ec is oversized.\\n\\nReject these tokens before calling xdr_buf_trim(), giving\\ncallers a well-defined GSS_S_DEFECTIVE_TOKEN error and\\nkeeping the xdr_buf internally consistent.  The wrapped blob\\nbegins at a nonzero offset -- both callers pass len as\\noffset + opaque_len -- so buf-\u003elen still counts the offset\\nbytes that precede the blob.  Compare the trim length\\nagainst the remaining wrapped segment, buf-\u003elen - offset,\\nrather than the whole buffer; comparing against buf-\u003elen\\nalone leaves an offset-wide window in which an oversized ec\\npasses the test and xdr_buf_trim() cuts into the bytes ahead\\nof the blob.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sunrpc/auth_gss/gss_krb5_wrap.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"ac9efc29346b6942e71f0e24a3178a9121330fab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"b5746095b59f4d11f39f08751d36bbdfd1e5deac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"9fc6d6e6db49ab55208d5dd1c424c1d0d9aa7296\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"4abb44a29bb515df6f49123848765c70fc9b5021\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"dfcd81ab45613d45996fbf483d4ef54b0ec90ab9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"1f9856af065b6158271687e9788407b9573fd16f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"880effc943ed82d6811f272ed3307c222b40f4d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf4c024b908353fcc48309374d39e3399d67dfd1\",\"lessThan\":\"ad484748eec0a66eac0f13ab53b3fbedb7333c91\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sunrpc/auth_gss/gss_krb5_wrap.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1f9856af065b6158271687e9788407b9573fd16f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4abb44a29bb515df6f49123848765c70fc9b5021\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/880effc943ed82d6811f272ed3307c222b40f4d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9fc6d6e6db49ab55208d5dd1c424c1d0d9aa7296\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ac9efc29346b6942e71f0e24a3178a9121330fab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ad484748eec0a66eac0f13ab53b3fbedb7333c91\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b5746095b59f4d11f39f08751d36bbdfd1e5deac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dfcd81ab45613d45996fbf483d4ef54b0ec90ab9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-13T06:50:08+00:00",
      "cve": "CVE-2026-89538",
      "id": "CVE-2026-89538",
      "initial_release_date": "2026-09-11T19:44:15.953000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: SUNRPC vulnerability in Kerberos v2 token processing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89538.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "critical",
      "current_release_date": "2026-09-13T16:58:47Z",
      "cve": "CVE-2026-89538",
      "id": "CVE-2026-89538",
      "initial_release_date": "2026-09-12T16:26:28Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89538",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89538.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.