CVE-2025-68742 (GCVE-0-2025-68742)
Vulnerability from cvelistv5 – Published: 2025-12-24 12:09 – Updated: 2026-10-15 01:10
VLAI
EPSS
VEX
Title
bpf: Fix invalid prog->stats access when update_effective_progs fails
Summary
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.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
8 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
492ecee892c2a4ba6a14903d5d586ff750b7e805 , < 93d1964773ff513c9bd530f7686d3e48b786fa6b
(git)
Affected: 492ecee892c2a4ba6a14903d5d586ff750b7e805 , < bf2c990b012100610c0f1ec5c4ea434da2d080c2 (git) Affected: 492ecee892c2a4ba6a14903d5d586ff750b7e805 , < 539137e3038ce6f953efd72110110f03c14c7d97 (git) Affected: 492ecee892c2a4ba6a14903d5d586ff750b7e805 , < 56905bb70c8b88421709bb4e32fcba617aa37d41 (git) Affected: 492ecee892c2a4ba6a14903d5d586ff750b7e805 , < 2579c356ccd35d06238b176e4b460978186d804b (git) Affected: 492ecee892c2a4ba6a14903d5d586ff750b7e805 , < 7dc211c1159d991db609bdf4b0fb9033c04adcbc (git) |
guessed | |
| Linux | Linux |
Affected:
5.1
Unaffected: 0 , < 5.1 (semver) Unaffected: 6.1.160 , ≤ 6.1.* (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.63 , ≤ 6.12.* (semver) Unaffected: 6.17.13 , ≤ 6.17.* (semver) Unaffected: 6.18.2 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
guessed |
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{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: Corrige el acceso inv\u00e1lido a prog -\u003e stats cuando update_effective_progs falla\n\nSyzkaller desencadena un problema de acceso a memoria inv\u00e1lido despu\u00e9s de la inyecci\u00f3n de fallos en update_effective_progs. El problema se puede describir de la siguiente manera:\n\n__cgroup_bpf_detach\n update_effective_progs\n compute_effective_progs\n bpf_prog_array_alloc \u003c- - inyecci\u00f3n de fallo\n purge_effective_progs\n /* cambio a dummy_bpf_prog */\n array -\u003e items[index] = \u0026dummy_bpf_prog.prog\n\n---inicio de softirq---\n__do_softirq\n ...\n __cgroup_bpf_run_filter_skb\n __bpf_prog_run_save_cb\n bpf_prog_run\n stats = this_cpu_ptr(prog -\u003e stats)\n /* acceso a memoria inv\u00e1lido */\n flags = u64_stats_update_begin_irqsave(\u0026stats -\u003e syncp)\n---fin de softirq---\n\n static_branch_dec(\u0026cgroup_bpf_enabled_key[atype])\n\nLa raz\u00f3n es que la inyecci\u00f3n de fallos provoc\u00f3 que update_effective_progs fallara y luego cambi\u00f3 el prog original a dummy_bpf_prog.prog en purge_effective_progs. Luego lleg\u00f3 una softirq, y el acceso a los miembros de dummy_bpf_prog.prog en la softirq desencadena un acceso a memoria inv\u00e1lido.\n\nPara solucionarlo, se omite la actualizaci\u00f3n de stats cuando stats es NULL."
}
],
"id": "CVE-2025-68742",
"lastModified": "2026-10-15T02:18:13.003",
"metrics": {},
"published": "2025-12-24T13:16:29.147",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2579c356ccd35d06238b176e4b460978186d804b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/539137e3038ce6f953efd72110110f03c14c7d97"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/56905bb70c8b88421709bb4e32fcba617aa37d41"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7dc211c1159d991db609bdf4b0fb9033c04adcbc"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/93d1964773ff513c9bd530f7686d3e48b786fa6b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bf2c990b012100610c0f1ec5c4ea434da2d080c2"
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-11-07T04:45:41+00:00",
"cve": "CVE-2025-68742",
"id": "CVE-2025-68742",
"initial_release_date": "2025-12-24T00:00:00+00:00",
"product_status:known_affected": "158",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: bpf: Fix invalid prog-\u003estats access when update_effective_progs fails",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68742.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.