kernel security update
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
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