bpf: Fix memleak due to fentry attach failure (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.16 % · percentile 5 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-401 — Missing Release of Memory after Effective Lifetime
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2023-59863
- GCVE · GCVE-0-2023-53221
CERT-FR advisories
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1070 — Multiples vulnérabilités dans Microsoft CBL Mariner · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1032 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1009 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0921 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0895 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.28 < 5.11cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11.11 < 5.12cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.12.1 < 6.1.39cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.3.13cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.4 < 6.4.4cpe:2.3:o:linux:linux_kernel:5.12:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.12:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.12:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.12:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.12:rc8:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected e21aa341785c679dd409c8cb71f864c00fe6c463 < 20109ddd5bea2c24d790debf5d02584ef24c3f5e ; affected e21aa341785c679dd409c8cb71f864c00fe6c463 < f72c67d1a82dada7d6d504c806e111e913721a30 ; affected e21aa341785c679dd409c8cb71f864c00fe6c463 < 6aa27775db63ba8c7c73891c7dfb71ddc230c48d ; affected e21aa341785c679dd409c8cb71f864c00fe6c463 < 108598c39eefbedc9882273ac0df96127a629220 ; affected e21d2b92354b3cd25dd774ebb0f0e52ff04a7861 ; affected 85d177f56e5256e14b74a65940f981f6e3e8bb32 |
| Linux · Linux | affected 5.12 ; unaffected 0 < 5.12 ; unaffected 6.1.39 ≤ 6.1.* ; unaffected 6.3.13 ≤ 6.3.* ; unaffected 6.4.4 ≤ 6.4.* ; unaffected 6.5 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |