CVE-2024-27005

Medium

In the Linux kernel, the following vulnerability has been resolved: interconnect: Don't access req_list while it's being manipulated The icc_lock mutex was split into separate icc_lock and icc_bw_lock mutexes in [1] to avoid lockdep splats. However, this didn't adequately protect access to icc_node::req_list. The icc_set_bw() function will eventually iterate over req_list while only holding icc_bw_lock, but req_list can be modified while only holding icc_lock. This causes races between icc_set_bw(), of_icc_get(), and icc_put(). Example A: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(&icc_bw_lock); icc_put(path_b) mutex_lock(&icc_lock); aggregate_requests() hlist_for_each_entry(r, ... hlist_del(... <r = invalid pointer> Example B: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(&icc_bw_lock); path_b = of_icc_get() of_icc_get_by_index() mutex_lock(&icc_lock); path_find() path_init() aggregate_requests() hlist_for_each_entry(r, ... hlist_add_head(... <r = invalid pointer> Fix this by ensuring icc_bw_lock is always held before manipulating icc_node::req_list. The additional places icc_bw_lock is held don't perform any memory allocations, so we should still be safe from the original lockdep splats that motivated the separate locks. [1] commit af42269c3523 ("interconnect: Fix locking for runpm vs reclaim")

Package Linux Kernel
Published 2024-05-01
Last modified 2025-12-23
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

6.3

out of 10
Medium
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness type

CWE-362

CVE-2024-27005 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.15.133, 6.1.55, 6.5.5, 6.6 and later are affected. Fixed in 5.15.151, 6.1.81, 6.6.29, 6.8.8, 6.9 and their respective stable series.

Affected from
≥ 5.15.133 ≥ 6.1.55 ≥ 6.5.5 ≥ 6.6
Fixed in
✓ 5.15.151 5.15.x ✓ 6.1.81 6.1.x ✓ 6.6.29 6.6.x ✓ 6.8.8 6.8.x ✓ 6.9

References

8 total
Showing 5 of 8 references View all on NVD

Frequently asked questions

  • What is CVE-2024-27005?

    CVE-2024-27005 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.3 out of 10 , classified as a Race Condition flaw (CWE-362) . It affects Linux kernel versions from 5.15.133 onward and has been patched in 5.15.151, 6.1.81, 6.6.29 and others. CVE-2024-27005 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-27005?

    CVE-2024-27005 has a CVSS score of 6.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H .

  • Is there a patch available for CVE-2024-27005?

    Yes. CVE-2024-27005 has been patched. Fixed versions include 5.15.151, 6.1.81, 6.6.29 and others. If you are running Linux kernel 5.15.133 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-27005 actively exploited?

    No. CVE-2024-27005 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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