Read the docs
TI-2024-30133 Aliases CVE-2024-45020GHSA-jf76-2c3p-rhc5

bpf: Fix a kernel verifier crash in stacksafe()

Priority LOW 34CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a kernel verifier crash in stacksafe() Daniel Hodges reported a kernel verifier crash when playing with sched-ext. Further investigation shows that the crash is due to invalid memory access in stacksafe(). More specifically, it is the following code: if (exact != NOT_EXACT && old->stack[spi].slot_type[i % BPF_REG_SIZE] != cur->stack[spi].slot_type[i % BPF_REG_SIZE]) return false; The 'i' iterates old->allocated_stack. If cur->allocated_stack < old->allocated_stack the out-of-bound access will happen. To fix the issue add 'i >= cur->allocated_stack' check such that if the condition is true, stacksafe() should fail. Otherwise, cur->stack[spi].slot_type[i % BPF_REG_SIZE] memory access is legal.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.6.48, 6.10.7, 6.11Red Hat: 1 advisoryRed Hat: 5 fixed, 1 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
LinuxLinux6.6.15 to before 6.6.486.6.48Patch availableCNA
LinuxLinux6.7 and later6.6.48, 6.10.7, 6.11Patch availableCNA
  • Linux VendorLinux Affected 6.6.15 to before 6.6.48 Fixed in 6.6.48 Patch available CNA
  • Linux VendorLinux Affected 6.7 and later Fixed in 6.6.48, 6.10.7, 6.11 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.6.15 to before 6.6.48; 6.7 to before 6.10.7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*6.11 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*6.11 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*6.11 rc3VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.6.15 to before 6.6.48; 6.7 to before 6.10.7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* Versions 6.11 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* Versions 6.11 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* Versions 6.11 rc3 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.6.48
  • Fix · CNA Linux (Linux) Fixed in 6.6.48, 6.10.7, 6.11

Red Hat 1 advisory

  • RHSA-2024:11486 Released 2024-12-19 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-503.19.1.el9_5, libperf-5.14.0-503.19.1.el9_5
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-503.19.1.el9_5, kernel-64k-debug-devel-matched-5.14.0-503.19.1.el9_5, kernel-64k-devel-5.14.0-503.19.1.el9_5 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.4.0-503.19.1.el9_5, kernel-5.14.0-503.19.1.el9_5, kernel-64k-5.14.0-503.19.1.el9_5 +30
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-503.19.1.el9_5, kernel-rt-core-5.14.0-503.19.1.el9_5, kernel-rt-debug-5.14.0-503.19.1.el9_5 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-503.19.1.el9_5, kernel-rt-core-5.14.0-503.19.1.el9_5, kernel-rt-debug-5.14.0-503.19.1.el9_5 +11

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2024:11486
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:11486
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:11486
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2024:11486
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2024:11486
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-45020
  2. 2026-10-03 Alias added: GHSA-jf76-2c3p-rhc5
  3. 2026-10-29 Affected versions changed · Red Hat

References

Patch 3

  • 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-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
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

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