CVE-2024-48881

MEDIUM EPSS 15.8%
Published Jan 11, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 11, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721. This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
15.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥4.19.291  –  <4.20
linuxlinux_kernel*≥5.4.251  –  <5.4.287
linuxlinux_kernel*≥5.10.188  –  <5.10.231
linuxlinux_kernel*≥5.15.121  –  <5.15.174
linuxlinux_kernel*≥6.1.39  –  <6.1.120
linuxlinux_kernel*≥6.4.4  –  <6.6.66
linuxlinux_kernel*≥6.7  –  <6.12.5
linuxlinux_kernel6.13any

References 9

  • git.kernel.org https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464
    Patch