5.5

CVE-2024-44968: tick/broadcast: Move per CPU pointer access into the atomic section

Modified
AliasesUBUNTU-CVE-2024-44968DEBIAN-CVE-2024-44968
Published 04-09-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-44968 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4
DLA-3912-1DLA-4008-1MGASA-2024-0309MGASA-2024-0310

Timeline

  1. 04-09-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu74 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ dfe19aa91378972f10530635ad83b2d77f481044, < f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 | ≥ 457a1c87d454455d671a3045cf0b56157be110a1, < f91fb47ecacc178a83a77eeebd25cbaec18c01d6 | ≥ 9ef7190228145f959d9bc0ddca40ecf76bb413b0, < 668c6c4a7e9e9f081c06b70f30104fb7013437ed | ≥ d3b165c10473aa6fc6141bb5b1f6e5b50c1fb774, < 541a900d245536d4809cb1aa322c3fcc2cdb58a6 | ≥ 408bfb6b0a7f22e971ce6b600aec448769e580a8, < 7b3ec186ba93e333e9efe7254e7e31c1828e5d2d | ≥ 3a58c590f6bd1d20eb1e76c5cea31c36cc032339, < b9d604933d5fd72dd37f24e1dc35f778297d745a | ≥ 2cdab4b4bf77369961f706cdeb7d040db10c5217, < 7dd12f85f150010ef7518201c63fa7e395f5c3e9 | ≥ f7d43dd206e7e18c182f200e67a8db8c209907fa, < 6881e75237a84093d0986f56223db3724619f26e | ≥ 6.1.103, < 6.1.105 | ≥ 6.6.44, < 6.6.46 | ≥ 6.10.3, < 6.10.5
  • linux_kernel≥ 6.1.103, < 6.1.105 | ≥ 6.6.44, < 6.6.46 | ≥ 6.10.3, < 6.10.5 | 6.11:rc1
Debian1 product
  • linux< 6.1.106-1 | < 6.10.6-1

3 vendors · 77 products

References

14 links
Show all 14 references