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TI-2026-46071 Aliases CVE-2026-64507GHSA-mfjh-rff8-525v

x86/bugs: Enable IBPB flush on BPF JIT allocation

Priority LOW 22Published · Updated

Key facts

Attack vector
—
Privileges required
—
User interaction
—
Attack complexity
—
Impact type
—
Confidentiality · integrity · availability
—
Fix status
Partial Red Hat: 22 fixed, 4 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Enable IBPB flush on BPF JIT allocation Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF dispatcher is already using a retpoline sequence. This hardening applies only when BPF-JIT is in use. Guard the enabling under CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.183, 6.6.145, 6.12.97 +3Red Hat: 4 advisoriesRed Hat: 22 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.18 and later6.1.183, 6.6.145, 6.12.97, 6.18.39, 7.1.4, 7.2Patch availableCNA
  • Linux VendorLinux Affected 5.18 and later Fixed in 6.1.183, 6.6.145, 6.12.97, 6.18.39, 7.1.4, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.183, 6.6.145, 6.12.97, 6.18.39, 7.1.4, 7.2

Red Hat 4 advisories

  • RHSA-2026:91648 Released 2026-10-28 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.114.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.114.1.el10_0, kernel-64k-devel-6.12.0-55.114.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.114.1.el10_0, kernel-64k-6.12.0-55.114.1.el10_0, kernel-64k-core-6.12.0-55.114.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.114.1.el10_0, libperf-6.12.0-55.114.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.114.1.el10_0, kernel-rt-64k-6.12.0-55.114.1.el10_0, kernel-rt-64k-core-6.12.0-55.114.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.114.1.el10_0, kernel-rt-core-6.12.0-55.114.1.el10_0, kernel-rt-debug-6.12.0-55.114.1.el10_0 +11
  • RHSA-2026:89890 Released 2026-10-26 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.151.1.el9_6, libperf-5.14.0-570.151.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.151.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.151.1.el9_6, kernel-64k-devel-5.14.0-570.151.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.151.1.el9_6, kernel-64k-5.14.0-570.151.1.el9_6, kernel-64k-core-5.14.0-570.151.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.151.1.el9_6, kernel-rt-64k-5.14.0-570.151.1.el9_6, kernel-rt-64k-core-5.14.0-570.151.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.151.1.el9_6, kernel-rt-core-5.14.0-570.151.1.el9_6, kernel-rt-debug-5.14.0-570.151.1.el9_6 +11
  • RHSA-2026:81552 Released 2026-10-13 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.57.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.57.1.el9_8, kernel-64k-devel-5.14.0-687.57.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.57.1.el9_8, kernel-64k-5.14.0-687.57.1.el9_8, kernel-64k-core-5.14.0-687.57.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.57.1.el9_8, libperf-5.14.0-687.57.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.57.1.el9_8, kernel-rt-64k-5.14.0-687.57.1.el9_8, kernel-rt-64k-core-5.14.0-687.57.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.57.1.el9_8, kernel-rt-core-5.14.0-687.57.1.el9_8, kernel-rt-debug-5.14.0-687.57.1.el9_8 +9
Show 1 more Red Hat advisories
  • RHSA-2026:81406 Released 2026-10-12 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • 10Base-SMTV kernel-modules-internal-6.12.0-211.65.1.el10_2
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.65.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.65.1.el10_2, kernel-64k-devel-6.12.0-211.65.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.65.1.el10_2, kernel-64k-6.12.0-211.65.1.el10_2, kernel-64k-core-6.12.0-211.65.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.65.1.el10_2, libperf-6.12.0-211.65.1.el10_2
    • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.65.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.65.1.el10_2, kernel-rt-64k-6.12.0-211.65.1.el10_2, kernel-rt-64k-core-6.12.0-211.65.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.65.1.el10_2, kernel-rt-core-6.12.0-211.65.1.el10_2, kernel-rt-debug-6.12.0-211.65.1.el10_2 +9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:81406
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:89890
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:81406
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:81552
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:91648
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:89890
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:81406
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:81552
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:91648
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:89890
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:81406
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:81552
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:91648
Red Hat Enterprise Linux Hidden (v. 10)Fixed RHSA-2026:81406
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:81406
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:81552
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:91648
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:89890
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:81406
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:81552
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:91648
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:89890
Not affected: 2 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64507
  2. 2026-10-03 Alias added: GHSA-mfjh-rff8-525v
  3. 2026-10-07 Affected versions changed · Red Hat
  4. 2026-10-13 Fix available: RHSA-2026:81406 · Red Hat
  5. 2026-10-13 Fix available: RHSA-2026:81552 · Red Hat
  6. 2026-10-13 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9) +9 · Red Hat
  7. 2026-10-27 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6) +2 · Red Hat
  8. 2026-10-29 Fix available: RHSA-2026:89890 · Red Hat
  9. 2026-10-29 Fix available: RHSA-2026:91648 · Red Hat
  10. 2026-10-29 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) +2 · Red Hat
  11. 2026-11-06 CISA SSVC decision points changed

References

Other 6

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21727 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences