- Description
- In the Linux kernel, the following vulnerability has been resolved: sched/fair: Fix potential memory corruption in child_cfs_rq_on_list child_cfs_rq_on_list attempts to convert a 'prev' pointer to a cfs_rq. This 'prev' pointer can originate from struct rq's leaf_cfs_rq_list, making the conversion invalid and potentially leading to memory corruption. Depending on the relative positions of leaf_cfs_rq_list and the task group (tg) pointer within the struct, this can cause a memory fault or access garbage data. The issue arises in list_add_leaf_cfs_rq, where both cfs_rq->leaf_cfs_rq_list and rq->leaf_cfs_rq_list are added to the same leaf list. Also, rq->tmp_alone_branch can be set to rq->leaf_cfs_rq_list. This adds a check `if (prev == &rq->leaf_cfs_rq_list)` after the main conditional in child_cfs_rq_on_list. This ensures that the container_of operation will convert a correct cfs_rq struct. This check is sufficient because only cfs_rqs on the same CPU are added to the list, so verifying the 'prev' pointer against the current rq's list head is enough. Fixes a potential memory corruption issue that due to current struct layout might not be manifesting as a crash but could lead to unpredictable behavior when the layout changes.
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- NVD status
- Analyzed
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
- nvd@nist.gov
- CWE-787
- Hype score
- Not currently trending
🔒 ALERTE SÉCURITÉ Multiples vulnérabilités critiques dans le noyau Linux de Red Hat identifiées par le CERT-FR. 📌 CVE-2025-21919 📌 CVE-2025-21964 📌 CVE-2025-37785 🛡️ Risques : atteinte à la confidentialité, déni de service. 📎 Détails : 📎 Détails
@VLPentest
7 Jun 2025
9 Impressions
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⚠️Actualización del kernel para Red Hat ❗CVE-2025-21919 ❗CVE-2025-37785 ➡️Más info: https://t.co/tsTTngekB1 https://t.co/cnnUspZGbg
@CERTpy
2 Jun 2025
109 Impressions
0 Retweets
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