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TI-2026-46072 Aliases CVE-2026-64508GHSA-667g-8hv2-vmxj

bpf: Support for hardening against JIT spraying

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, 3 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: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is written into space that a previous program occupied, an indirect jump into the new program can reuse a branch prediction left behind by the old one. Flush the indirect branch predictors before reusing JIT memory so that indirect jumps into a newly written program don't reuse predictions from an old program that occupied the same space. Introduce bpf_arch_pred_flush_enabled static key and bpf_arch_pred_flush static call for flushing the branch predictors on JIT memory reuse. Architectures that need a flush, can update it to a predictor flush function. By default, its a NOP and does not emit any CALL. Allocations larger than a pack are not covered by this flush. That is safe because cBPF programs (the unprivileged attack surface) are bounded well below a pack size. Issue a warning if this assumption is ever violated while the flush is active.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00189 8th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.183, 6.6.145, 6.12.97 +3Red Hat: 4 advisoriesRed Hat: 22 fixed, 3 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 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: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64508
  2. 2026-10-03 Alias added: GHSA-667g-8hv2-vmxj
  3. 2026-10-13 Fix available: RHSA-2026:81406 · Red Hat
  4. 2026-10-13 Fix available: RHSA-2026:81552 · Red Hat
  5. 2026-10-13 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9) +9 · Red Hat
  6. 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
  7. 2026-10-29 Fix available: RHSA-2026:89890 · Red Hat
  8. 2026-10-29 Fix available: RHSA-2026:91648 · Red Hat
  9. 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
  10. 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