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TI-2023-29514 Aliases CVE-2023-53221GHSA-2px5-v96w-8g69

bpf: Fix memleak due to fentry attach failure

Priority LOW 24CWE-401Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-401.

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix memleak due to fentry attach failure If it fails to attach fentry, the allocated bpf trampoline image will be left in the system. That can be verified by checking /proc/kallsyms. This meamleak can be verified by a simple bpf program as follows: SEC("fentry/trap_init") int fentry_run() { return 0; } It will fail to attach trap_init because this function is freed after kernel init, and then we can find the trampoline image is left in the system by checking /proc/kallsyms. $ tail /proc/kallsyms ffffffffc0613000 t bpf_trampoline_6442453466_1 [bpf] ffffffffc06c3000 t bpf_trampoline_6442453466_1 [bpf] $ bpftool btf dump file /sys/kernel/btf/vmlinux | grep "FUNC 'trap_init'" [2522] FUNC 'trap_init' type_id=119 linkage=static $ echo $((6442453466 & 0x7fffffff)) 2522 Note that there are two left bpf trampoline images, that is because the libbpf will fallback to raw tracepoint if -EINVAL is returned.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00159 5th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.11, 5.12, 6.1.39 +3Red Hat: 1 advisoryRed Hat: 5 fixed, 2 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
LinuxLinux5.10.28 to before 5.11; 5.11.11 to before 5.125.11, 5.12Patch availableCNA
LinuxLinux5.12 and later6.1.39, 6.3.13, 6.4.4, 6.5Patch availableCNA
  • Linux VendorLinux Affected 5.10.28 to before 5.11; 5.11.11 to before 5.12 Fixed in 5.11, 5.12 Patch available CNA
  • Linux VendorLinux Affected 5.12 and later Fixed in 6.1.39, 6.3.13, 6.4.4, 6.5 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.10.28 to before 5.11; 5.11.11 to before 5.12; 5.12.1 to before 6.1.39; 6.2 to before 6.3.13; 6.4 to before 6.4.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.12:-:*:*:*:*:*:*5.12VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.12:rc5:*:*:*:*:*:*5.12 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.12:rc6:*:*:*:*:*:*5.12 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.12:rc7:*:*:*:*:*:*5.12 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.12:rc8:*:*:*:*:*:*5.12 rc8VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.28 to before 5.11; 5.11.11 to before 5.12; 5.12.1 to before 6.1.39; 6.2 to before 6.3.13; 6.4 to before 6.4.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.12:-:*:*:*:*:*:* Versions 5.12 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.12:rc5:*:*:*:*:*:* Versions 5.12 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.12:rc6:*:*:*:*:*:* Versions 5.12 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.12:rc7:*:*:*:*:*:* Versions 5.12 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.12:rc8:*:*:*:*:*:* Versions 5.12 rc8 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.11, 5.12
  • Fix · CNA Linux (Linux) Fixed in 6.1.39, 6.3.13, 6.4.4, 6.5

Red Hat 1 advisory

  • RHSA-2024:2394 Released 2024-04-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.13.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.13.1.el9_4, kernel-64k-devel-5.14.0-427.13.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.13.1.el9_4, kernel-5.14.0-427.13.1.el9_4, kernel-64k-5.14.0-427.13.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.13.1.el9_4, libperf-5.14.0-427.13.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:2394
Not affected: 3 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-53221
  2. 2026-10-03 Alias added: GHSA-2px5-v96w-8g69

References

Patch 4

  • 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