CVEvulnerability

CVE-2020-36791

7.1 HIGH Published 2025-05-07 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2025-05-07
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weaknesses
CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: keep alloc_hash updated after hash allocation In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex") I moved cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched. This difference could lead to another out of bound access. cp->alloc_hash should always be the size allocated, we should update it after this tcindex_alloc_perfect_hash().

Affected configurations

• linux linux kernel (>= 4.4.214 < 4.4.218) • linux linux kernel (>= 4.9.214 < 4.9.218) • linux linux kernel (>= 4.14.171 < 4.14.175) • linux linux kernel (>= 4.19.103 < 4.19.114) • linux linux kernel (>= 5.4.19 < 5.4.29) • linux linux kernel (>= 5.5.3 < 5.5.14) • linux linux kernel 5.6

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References