Read the docs
TI-2026-64483 Aliases CVE-2026-98085GHSA-7c78-fpcm-vcqr

bpf: backtrack_insn(): Handle ld_{abs,ind} subprog exit edge

Priority LOW 22Published · Updated

Key facts

Attack vector
—
Privileges required
—
User interaction
—
Attack complexity
—
Impact type
—
Confidentiality · integrity · availability
—
Fix status
Fixed

No CVSS vector from any source. Fix status from CNA.

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: backtrack_insn(): Handle ld_{abs,ind} subprog exit edge Nicholas Carlini reported a bug in precision backtracking mechanism for BPF_LD | BPF_{IND,ABS} instructions. These instructions are modelled as two branches: - fallthrough; - implicit exit from current subprogram. The implicit exit case was not handled by the backtrack_insn() function. When backtracking such a path backtrack_insn() did not call bt_subprog_enter(), which meant that backtracking continued manipulating precision marks in a caller frame, while looking at instructions in a callee frame. This lead to segmentation faults during verification (see the selftest), or unsound state pruning.

Why it matters now

EPSS 0.002 9th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.6.160, 6.12.114, 6.18.57 +6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.6.148 to before 6.6.160; 6.12.101 to before 6.12.114; 6.18.42 to before 6.18.57; 5.10.265 to before 5.11; 5.15.216 to before 5.16; 6.1.183 to before 6.2; 7.0.10 to before 7.16.6.160, 6.12.114, 6.18.57, 5.11, 5.16, 6.2, 7.1Patch availableCNA
LinuxLinux7.1 and later6.6.160, 6.12.114, 6.18.57, 7.2.7, 7.3Patch availableCNA
  • Linux VendorLinux Affected 6.6.148 to before 6.6.160; 6.12.101 to before 6.12.114; 6.18.42 to before 6.18.57; 5.10.265 to before 5.11; 5.15.216 to before 5.16; 6.1.183 to before 6.2; 7.0.10 to before 7.1 Fixed in 6.6.160, 6.12.114, 6.18.57, 5.11, 5.16, 6.2, 7.1 Patch available CNA
  • Linux VendorLinux Affected 7.1 and later Fixed in 6.6.160, 6.12.114, 6.18.57, 7.2.7, 7.3 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 6.6.160, 6.12.114, 6.18.57, 5.11, 5.16, 6.2, 7.1
  • Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.114, 6.18.57, 7.2.7, 7.3

Vendor assessments

Red Hat

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

Not affected: 7 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-98085
  2. 2026-10-03 Alias added: GHSA-7c78-fpcm-vcqr
  3. 2026-10-16 Fix available: Linux/[email protected], Linux/Linux@a0cd9e22f8faed30a8da8be357c51bd8b3074ee9 · CNA
  4. 2026-10-16 1 new reference · CNA
  5. 2026-10-19 Fix available: Linux/[email protected] · CNA
  6. 2026-10-21 Fix available: Linux/Linux@12c064bcfa56e3631be9f5336ee113b7f849959a, Linux/Linux@19cca7c36055906b3cff3e297618ee8a50cde25d, Linux/[email protected] +1 · CNA
  7. 2026-10-21 2 new references · CNA
  8. 2026-10-21 Affected versions changed · Red Hat
  9. 2026-10-21 CVSS score added · Red Hat
  10. 2026-11-06 Affected versions changed · Red Hat

References

Other 5

  • 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