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CriticalFix available

kernel security update

Type: advisorySource: OSV1 source record

The Linux Kernel, the operating system core itself. Security Fix(es): In the Linux kernel, the following vulnerability has been resolved: sctp: purge outqueue on stale COOKIE-ECHO handling sctp_stream_update() is only invoked when the association is moved into COOKIE_WAIT during association setup/reconfiguration. In this path, the outbound stream scheduler state (stream->out_curr) is expected to be clean, since no user data should have been transmitted yet unless the state machine has already partially progressed. However, a corner case exists in sctp_sf_do_5_2_6_stale(): when a Stale Cookie ERROR is received, the association is rolled back from COOKIE_ECHOED to COOKIE_WAIT. In this scenario, user data may already have been queued and even bundled with the COOKIE-ECHO chunk. During the rollback, sctp_stream_update() frees the old stream table and installs a new one, but it does not invalidate stream->out_curr. As a result, out_curr may still point to a freed sctp_stream_out entry from the previous stream state. Later, SCTP scheduler dequeue paths (FCFS, RR, PRIO, etc.) rely on stream->out_curr->ext, which can lead to use-after-free once the old stream state has been released via sctp_stream_free(). This results in crashes such as (reported by Yuqi): BUG: KASAN: slab-use-after-free in sctp_sched_fcfs_dequeue+0x13a/0x140 Read of size 8 at addr ff1100004d4d3208 by task mini_poc/9312 CPU: 1 UID: 1001 PID: 9312 Comm: mini_poc Not tainted 7.1.0-rc1-00305-gbd3a4795d574 #5 PREEMPT(fu

Announced Source revision 1
Original source ↗

OESA-2026-4038

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: osv:OESA-2026-4038

kernel

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
4.19.90-2609.3.0.0391.oe2003sp4

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "4.19.90-2609.3.0.0391.oe2003sp4"
          }
        ]
      }
    ],
    "package": {
      "name": "kernel",
      "purl": "pkg:rpm/openEuler/kernel&distro=openEuler-20.03-LTS-SP4",
      "ecosystem": "openEuler:20.03-LTS-SP4"
    },
    "database_specific": {
      "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4038.json"
    },
    "ecosystem_specific": {
      "src": [
        "kernel-4.19.90-2609.3.0.0391.oe2003sp4.src.rpm"
      ],
      "x86_64": [
        "bpftool-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "bpftool-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-debugsource-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-devel-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-source-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-tools-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-tools-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "kernel-tools-devel-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "perf-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "perf-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "python2-perf-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "python2-perf-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "python3-perf-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm",
        "python3-perf-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.x86_64.rpm"
      ],
      "aarch64": [
        "bpftool-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "bpftool-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-debugsource-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-devel-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-source-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-tools-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-tools-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "kernel-tools-devel-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "perf-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "perf-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "python2-perf-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "python2-perf-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "python3-perf-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm",
        "python3-perf-debuginfo-4.19.90-2609.3.0.0391.oe2003sp4.aarch64.rpm"
      ]
    }
  }
]

Publisher severity

critical

Source reference: /database_specific/severity

Event
#14666 · Revision 1
Added to Heist Feed
Publisher date
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