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sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT A null-ptr-deref was reported in the SCTP transmit path when SCTP-AUTH key initialization fails: ================================================================== KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 PID: 16 Comm: ksoftirqd/0 Tainted: G W 6.6.0 #2 RIP: 0010:sctp_packet_bundle_auth net/sctp/output.c:264 [inline] RIP: 0010:sctp_packet_append_chunk+0xb36/0x1260 net/sctp/output.c:401 Call Trace: sctp_packet_transmit_chunk+0x31/0x250 net/sctp/output.c:189 sctp_outq_flush_data+0xa29/0x26d0 net/sctp/outqueue.c:1111 sctp_outq_flush+0xc80/0x1240 net/sctp/outqueue.c:1217 sctp_cmd_interpreter.isra.0+0x19a5/0x62c0 net/sctp/sm_sideeffect.c:1787 sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline] sctp_do_sm+0x1a3/0x670 net/sctp/sm_sideeffect.c:1169 sctp_assoc_bh_rcv+0x33e/0x640 net/sctp/associola.c:1052 sctp_inq_push+0x1dd/0x280 net/sctp/inqueue.c:88 sctp_rcv+0x11ae/0x3100 net/sctp/input.c:243 sctp6_rcv+0x3d/0x60 net/sctp/ipv6.c:1127 The issue is triggered when sctp_auth_asoc_init_active_key() fails in sctp_sf_do_5_1C_ack() while processing an INIT_ACK. In this case, the command sequence is currently: - SCTP_CMD_PEER_INIT - SCTP_CMD_TIMER_STOP (T1_INIT) - SCTP_CMD_TIMER_START (T1_COOKIE) - SCTP_CMD_NEW_STATE (COOKIE_ECHOED) - SCTP_CMD_ASSOC_SHKEY - SCTP_CMD_GEN_COOKIE_ECHO If SCTP_CMD_ASSOC_SHKEY fails, asoc->shkey

Announced Source revision 1
Original source ↗

CVE-2026-23125

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-23125

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "5a309bedf02ee08b0653215f06c94d61ec7a214a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "784428ab1889eb185a1459e9d6bc52df33d572ef",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "e94294798548e8cfbd80869e1d2f97efce92582c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "e7e81abbcc5620c9532080538f9709a6ea382855",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "bf2b543b3cc4ebb4ab5bca4f8dfa5612035d45b8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "0c4adb1f391a7b92a0405e9d7c05624c0d9f8a65",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "730fc3d05cd4ba4c9ce2de91f3d43349e95dbbf5",
        "lessThan": "a80c9d945aef55b23b54838334345f20251dad83",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/sctp/sm_statefuns.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.24"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.24",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.249",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.199",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.162",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.122",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.68",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.8",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/sctp/sm_statefuns.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23125

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#39762 · Revision 1
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Publisher date
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