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TI-2024-27273 Aliases CVE-2024-40909GHSA-v89r-8c65-6vgh

bpf: Fix a potential use-after-free in bpf_link_free()

Priority LOW 34CWE-416Published · 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: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00278 20th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.6.35, 6.9, 6.9.6 +1Red Hat: 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
LinuxLinux6.6.26 to before 6.6.35; 6.8.5 to before 6.96.6.35, 6.9Patch availableCNA
LinuxLinux6.9 and later6.6.35, 6.9.6, 6.10Patch availableCNA
  • Linux VendorLinux Affected 6.6.26 to before 6.6.35; 6.8.5 to before 6.9 Fixed in 6.6.35, 6.9 Patch available CNA
  • Linux VendorLinux Affected 6.9 and later Fixed in 6.6.35, 6.9.6, 6.10 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.6.26 to before 6.6.35; 6.9 to before 6.9.6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*6.10 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*6.10 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.6.26 to before 6.6.35; 6.9 to before 6.9.6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* Versions 6.10 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* Versions 6.10 rc2 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.6.35, 6.9
  • Fix · CNA Linux (Linux) Fixed in 6.6.35, 6.9.6, 6.10

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
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-40909
  2. 2026-10-03 Alias added: GHSA-v89r-8c65-6vgh
  3. 2026-10-30 Fix available: Linux/Linux@e8ccda39b395169622855607085cdeef4d376e0f · CNA
  4. 2026-10-30 1 new reference · CNA

References

Patch 3

Other 1

  • 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