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bpf: Fix invalid prog->stats access when update_effective_progs fails (Linux Linux)

CVE-2025-68742
Non disponible

En bref

Source
NVD
EPSS
EPSS 0.21 % · centile 12 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

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Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix invalid prog->stats access when update_effective_progs fails Syzkaller triggers an invalid memory access issue following fault injection in update_effective_progs. The issue can be described as follows: __cgroup_bpf_detach update_effective_progs compute_effective_progs bpf_prog_array_alloc <-- fault inject purge_effective_progs /* change to dummy_bpf_prog */ array->items[index] = &dummy_bpf_prog.prog ---softirq start--- __do_softirq ... __cgroup_bpf_run_filter_skb __bpf_prog_run_save_cb bpf_prog_run stats = this_cpu_ptr(prog->stats) /* invalid memory access */ flags = u64_stats_update_begin_irqsave(&stats->syncp) ---softirq end--- static_branch_dec(&cgroup_bpf_enabled_key[atype]) The reason is that fault injection caused update_effective_progs to fail and then changed the original prog into dummy_bpf_prog.prog in purge_effective_progs. Then a softirq came, and accessing the members of dummy_bpf_prog.prog in the softirq triggers invalid mem access. To fix it, skip updating stats when stats is NULL.

Références

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected 492ecee892c2a4ba6a14903d5d586ff750b7e805 < 93d1964773ff513c9bd530f7686d3e48b786fa6b ; affected 492ecee892c2a4ba6a14903d5d586ff750b7e805 < bf2c990b012100610c0f1ec5c4ea434da2d080c2 ; affected 492ecee892c2a4ba6a14903d5d586ff750b7e805 < 539137e3038ce6f953efd72110110f03c14c7d97 ; affected 492ecee892c2a4ba6a14903d5d586ff750b7e805 < 56905bb70c8b88421709bb4e32fcba617aa37d41 ; affected 492ecee892c2a4ba6a14903d5d586ff750b7e805 < 2579c356ccd35d06238b176e4b460978186d804b ; affected 492ecee892c2a4ba6a14903d5d586ff750b7e805 < 7dc211c1159d991db609bdf4b0fb9033c04adcbc
Linux · Linuxaffected 5.1 ; unaffected 0 < 5.1 ; unaffected 6.1.160 ≤ 6.1.* ; unaffected 6.6.120 ≤ 6.6.* ; unaffected 6.12.63 ≤ 6.12.* ; unaffected 6.17.13 ≤ 6.17.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD