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Fencer Vulns
high 8.1

CVE-2025-40186 json

tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().

published 2025-11-12 11 mo ago modified 2026-10-19 20 d ago also EUVD-2025-150388

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().

syzbot reported the splat below in tcp_conn_request(). [0]

If a listener is close()d while a TFO socket is being processed in tcp_conn_request(), inet_csk_reqsk_queue_add() does not set reqsk->sk and calls inet_child_forget(), which calls tcp_disconnect() for the TFO socket.

After the cited commit, tcp_disconnect() calls reqsk_fastopen_remove(), where reqsk_put() is called due to !reqsk->sk.

Then, reqsk_fastopen_remove() in tcp_conn_request() decrements the last req->rsk_refcnt and frees reqsk, and __reqsk_free() at the drop_and_free label causes the refcount underflow for the listener and double-free of the reqsk.

Let's remove reqsk_fastopen_remove() in tcp_conn_request().

Note that other callers make sure tp->fastopen_rsk is not NULL.

[0]: refcount_t: underflow; use-after-free. WARNING: CPU: 12 PID: 5563 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28) Modules linked in: CPU: 12 UID: 0 PID: 5563 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:refcount_warn_saturate (lib/refcount.c:28) Code: ab e8 8e b4 98 ff 0f 0b c3 cc cc cc cc cc 80 3d a4 e4 d6 01 00 75 9c c6 05 9b e4 d6 01 01 48 c7 c7 e8 df fb ab e8 6a b4 98 ff <0f> 0b e9 03 5b 76 00 cc 80 3d 7d e4 d6 01 00 0f 85 74 ff ff ff c6 RSP: 0018:ffffa79fc0304a98 EFLAGS: 00010246 RAX: d83af4db1c6b3900 RBX: ffff9f65c7a69020 RCX: d83af4db1c6b3900 RDX: 0000000000000000 RSI: 00000000ffff7fff RDI: ffffffffac78a280 RBP: 000000009d781b60 R08: 0000000000007fff R09: ffffffffac6ca280 R10: 0000000000017ffd R11: 0000000000000004 R12: ffff9f65c7b4f100 R13: ffff9f65c7d23c00 R14: ffff9f65c7d26000 R15: ffff9f65c7a64ef8 FS: 00007f9f962176c0(0000) GS:ffff9f65fcf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000180 CR3: 000000000dbbe006 CR4: 0000000000372ef0 Call Trace: <IRQ> tcp_conn_request (./include/linux/refcount.h:400 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/sock.h:1965 ./include/net/request_sock.h:131 net/ipv4/tcp_input.c:7301) tcp_rcv_state_process (net/ipv4/tcp_input.c:6708) tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1670) tcp_v6_rcv (net/ipv6/tcp_ipv6.c:1906) ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438) ip6_input (net/ipv6/ip6_input.c:500) ipv6_rcv (net/ipv6/ip6_input.c:311) __netif_receive_skb (net/core/dev.c:6104) process_backlog (net/core/dev.c:6456) __napi_poll (net/core/dev.c:7506) net_rx_action (net/core/dev.c:7569 net/core/dev.c:7696) handle_softirqs (kernel/softirq.c:579) do_softirq (kernel/softirq.c:480) </IRQ>

Patch / fix

  • Linux Linux 5.4.301, 5.10.246, 5.15.195, 6.1.157, 6.6.113, 6.12.54, 6.17, 6.17.4, 6.18
  • linux Debian 12 6.1.158-1
  • linux Debian 13 6.12.57-1
  • linux Debian 14 6.17.6-1

debian advisories DEBIAN-CVE-2025-40186

  • linux Ubuntu 25.10 6.17.0-14.14
  • linux-aws Ubuntu 25.10 6.17.0-1007.7
  • linux-gcp Ubuntu 25.10 6.17.0-1007.7
  • linux-azure Ubuntu 25.10 6.17.0-1008.8
  • linux-raspi Ubuntu 25.10 6.17.0-1008.8
  • linux-riscv Ubuntu 25.10 6.17.0-14.14.1
  • linux-oracle Ubuntu 25.10 6.17.0-1007.7
  • linux-aws-6.17 Ubuntu 24.04 LTS 6.17.0-1007.7~24.04.1

ubuntu advisories UBUNTU-CVE-2025-40186

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.87.1.rt7.428.el8_10

red hat advisories RHSA-2025:23463RHSA-2025:23450RHSA-2025:23425RHSA-2025:23422RHSA-2025:23445RHSA-2025:23426

  • kernel-livepatch-SLE16-RT_Update_0 Linux Micro 6.2 5-160000.3.4
  • kernel-livepatch-SLE16_Update_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 7-160000.4.3
  • kernel-livepatch-SLE16-RT_Update_1 Linux Micro 6.2 4-160000.1.1
  • kernel-source Linux Micro 6.1, Linux Micro 6.0 6.4.0-38.1
  • kernel-default Linux Micro 6.1, Linux Micro 6.0 6.4.0-38.1
  • kernel-kvmsmall Linux Micro 6.1, Linux Micro 6.0 6.4.0-38.1
  • kernel-default-base Linux Micro 6.1, Linux Micro 6.0 6.4.0-38.1.21.15
  • kernel-livepatch-MICRO-6-0-RT_Update_11 Linux Micro 6.1, Linux Micro 6.0 6-1.1

suse advisories SUSE-SU-2026:20645-1SUSE-SU-2026:20635-1SUSE-SU-2026:20644-1SUSE-SU-2026:20558-1SUSE-SU-2026:20473-1SUSE-SU-2026:20496-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.8.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.8.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.8.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.8.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.8.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.8.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.8.1
  • kernel-kvmsmall openSUSE Leap 16.0 6.12.0-160000.8.1

opensuse advisories openSUSE-SU-2025:20172-1

  • kernel-rt AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.87.1.rt7.428.el8_10
  • kernel AlmaLinux 8 4.18.0-553.87.1.el8_10

almalinux advisories ALSA-2025:22387ALSA-2025:22388

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-40186 updated cvss 7.0

kernel: Linux kernel: Privilege escalation or Denial of Service via TCP Fast Open vulnerability

  • Red Hat Enterprise Linux 7 kernel-rt, kernel-rt-kvm, kernel-rt-trace, kernel-rt-debug-kvm, kernel-rt-trace-kvm Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.103.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.103.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.103.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.103.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.103.1.el9_4
    fixed: vendor fix RHSA-2025:23450
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.69.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.69.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.69.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.69.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.69.1.el9_6
    fixed: vendor fix RHSA-2025:22392
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.158.1.el9_0, kernel-devel-matched 5.14.0-70.158.1.el9_0, kernel-debug-devel-matched 5.14.0-70.158.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.158.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.158.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.158.1.el9_0, +2 more
    fixed: vendor fix RHSA-2025:23426
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.150.1.el9_2, rtla 5.14.0-284.150.1.el9_2, kernel-devel-matched 5.14.0-284.150.1.el9_2, kernel-64k-devel-matched 5.14.0-284.150.1.el9_2, kernel-debug-devel-matched 5.14.0-284.150.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.150.1.el9_2, +5 more
    fixed: vendor fix RHSA-2025:23423
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.103.1.el9_4, perf 5.14.0-427.103.1.el9_4, rtla 5.14.0-427.103.1.el9_4, kernel-devel-matched 5.14.0-427.103.1.el9_4, kernel-64k-devel-matched 5.14.0-427.103.1.el9_4, kernel-debug-devel-matched 5.14.0-427.103.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:23450
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.69.1.el9_6, perf 5.14.0-570.69.1.el9_6, rtla 5.14.0-570.69.1.el9_6, python3-perf 5.14.0-570.69.1.el9_6, kernel-devel-matched 5.14.0-570.69.1.el9_6, kernel-64k-devel-matched 5.14.0-570.69.1.el9_6, +7 more
    fixed: vendor fix RHSA-2025:22392
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.87.1.el8_10, kernel 4.18.0-553.87.1.el8_10, bpftool 4.18.0-553.87.1.el8_10, kernel-core 4.18.0-553.87.1.el8_10, kernel-tools 4.18.0-553.87.1.el8_10, python3-perf 4.18.0-553.87.1.el8_10, +15 more
    fixed: vendor fix RHSA-2025:22388
show 22 more
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.178.1.el8_2, kernel 4.18.0-193.178.1.el8_2, bpftool 4.18.0-193.178.1.el8_2, kernel-core 4.18.0-193.178.1.el8_2, kernel-tools 4.18.0-193.178.1.el8_2, python3-perf 4.18.0-193.178.1.el8_2, +8 more
    fixed: vendor fix RHSA-2025:23445
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.182.1.el8_4, kernel 4.18.0-305.182.1.el8_4, bpftool 4.18.0-305.182.1.el8_4, kernel-core 4.18.0-305.182.1.el8_4, kernel-tools 4.18.0-305.182.1.el8_4, python3-perf 4.18.0-305.182.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:23463
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.173.1.el8_6, kernel 4.18.0-372.173.1.el8_6, bpftool 4.18.0-372.173.1.el8_6, kernel-core 4.18.0-372.173.1.el8_6, kernel-tools 4.18.0-372.173.1.el8_6, python3-perf 4.18.0-372.173.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.173.1.el8_6, kernel 4.18.0-372.173.1.el8_6, bpftool 4.18.0-372.173.1.el8_6, kernel-core 4.18.0-372.173.1.el8_6, kernel-tools 4.18.0-372.173.1.el8_6, python3-perf 4.18.0-372.173.1.el8_6, +15 more
    fixed: vendor fix RHSA-2025:23425
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.123.1.el8_8, kernel 4.18.0-477.123.1.el8_8, bpftool 4.18.0-477.123.1.el8_8, kernel-core 4.18.0-477.123.1.el8_8, kernel-tools 4.18.0-477.123.1.el8_8, python3-perf 4.18.0-477.123.1.el8_8, +9 more
    fixed: vendor fix RHSA-2025:23427
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.158.1.el9_0, bpftool 5.14.0-70.158.1.el9_0, kernel-core 5.14.0-70.158.1.el9_0, kernel-tools 5.14.0-70.158.1.el9_0, python3-perf 5.14.0-70.158.1.el9_0, kernel-modules 5.14.0-70.158.1.el9_0, +14 more
    fixed: vendor fix RHSA-2025:23426
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.150.1.el9_2, kernel 5.14.0-284.150.1.el9_2, kernel-64k 5.14.0-284.150.1.el9_2, kernel-core 5.14.0-284.150.1.el9_2, kernel-tools 5.14.0-284.150.1.el9_2, python3-perf 5.14.0-284.150.1.el9_2, +28 more
    fixed: vendor fix RHSA-2025:23423
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.103.1.el9_4, kernel 5.14.0-427.103.1.el9_4, kernel-64k 5.14.0-427.103.1.el9_4, kernel-core 5.14.0-427.103.1.el9_4, kernel-tools 5.14.0-427.103.1.el9_4, python3-perf 5.14.0-427.103.1.el9_4, +28 more
    fixed: vendor fix RHSA-2025:23450
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.69.1.el9_6, kernel-64k 5.14.0-570.69.1.el9_6, kernel-core 5.14.0-570.69.1.el9_6, kernel-tools 5.14.0-570.69.1.el9_6, kernel-modules 5.14.0-570.69.1.el9_6, kernel-64k-core 5.14.0-570.69.1.el9_6, +27 more
    fixed: vendor fix RHSA-2025:22392
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.182.1.el8_4, kernel 4.18.0-305.182.1.el8_4, bpftool 4.18.0-305.182.1.el8_4, kernel-core 4.18.0-305.182.1.el8_4, kernel-tools 4.18.0-305.182.1.el8_4, python3-perf 4.18.0-305.182.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:23463
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.173.1.el8_6, kernel 4.18.0-372.173.1.el8_6, bpftool 4.18.0-372.173.1.el8_6, kernel-core 4.18.0-372.173.1.el8_6, kernel-tools 4.18.0-372.173.1.el8_6, python3-perf 4.18.0-372.173.1.el8_6, +8 more
    fixed: vendor fix RHSA-2025:23425
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.123.1.el8_8, kernel 4.18.0-477.123.1.el8_8, bpftool 4.18.0-477.123.1.el8_8, kernel-core 4.18.0-477.123.1.el8_8, kernel-tools 4.18.0-477.123.1.el8_8, python3-perf 4.18.0-477.123.1.el8_8, +8 more
    fixed: vendor fix RHSA-2025:23427
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.87.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.87.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.87.1.el8_10
    fixed: vendor fix RHSA-2025:22388
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-kvm 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-core 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-modules 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-debug-kvm 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-debug-core 4.18.0-553.87.1.rt7.428.el8_10, +4 more
    fixed: vendor fix RHSA-2025:22387
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-kvm 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-core 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-modules 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-debug-kvm 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-debug-core 5.14.0-70.158.1.rt21.230.el9_0, +4 more Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-core 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-modules 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-debug-core 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-debug-modules 5.14.0-70.158.1.rt21.230.el9_0, kernel-rt-modules-extra 5.14.0-70.158.1.rt21.230.el9_0, +2 more
    fixed: vendor fix RHSA-2025:23424
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-core 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-modules 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-debug-core 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-modules-core 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-debug-modules 5.14.0-284.150.1.rt14.435.el9_2, +4 more
    fixed: vendor fix RHSA-2025:23422
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.103.1.el9_4, kernel-rt-core 5.14.0-427.103.1.el9_4, kernel-rt-modules 5.14.0-427.103.1.el9_4, kernel-rt-debug-core 5.14.0-427.103.1.el9_4, kernel-rt-modules-core 5.14.0-427.103.1.el9_4, kernel-rt-debug-modules 5.14.0-427.103.1.el9_4, +4 more
    fixed: vendor fix RHSA-2025:23450
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.69.1.el9_6, kernel-rt-64k 5.14.0-570.69.1.el9_6, kernel-rt-core 5.14.0-570.69.1.el9_6, kernel-rt-modules 5.14.0-570.69.1.el9_6, kernel-rt-64k-core 5.14.0-570.69.1.el9_6, kernel-rt-debug-core 5.14.0-570.69.1.el9_6, +14 more
    fixed: vendor fix RHSA-2025:22392
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-kvm 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-core 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-modules 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-debug-kvm 5.14.0-284.150.1.rt14.435.el9_2, kernel-rt-debug-core 5.14.0-284.150.1.rt14.435.el9_2, +6 more
    fixed: vendor fix RHSA-2025:23422
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.103.1.el9_4, kernel-rt-kvm 5.14.0-427.103.1.el9_4, kernel-rt-core 5.14.0-427.103.1.el9_4, kernel-rt-modules 5.14.0-427.103.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.103.1.el9_4, kernel-rt-debug-core 5.14.0-427.103.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:23450
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.69.1.el9_6, kernel-rt-kvm 5.14.0-570.69.1.el9_6, kernel-rt-core 5.14.0-570.69.1.el9_6, kernel-rt-modules 5.14.0-570.69.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.69.1.el9_6, kernel-rt-debug-core 5.14.0-570.69.1.el9_6, +6 more
    fixed: vendor fix RHSA-2025:22392
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-core 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-modules 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-debug-core 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-debug-modules 4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-modules-extra 4.18.0-553.87.1.rt7.428.el8_10, +2 more
    fixed: vendor fix RHSA-2025:22387
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.