7.8

CVE-2024-56623: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2024-56623DEBIAN-CVE-2024-56623
Published 27-12-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-56623 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 44 · Related 41
DLA-4075-1DLA-4076-1MGASA-2025-0030MGASA-2025-0032RHSA-2025:6966SUSE-SU-2025:0289-1

Timeline

  1. 27-12-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix use after free on unload System crash is observed with stack trace warning of use after free. There are 2 signals to tell dpc_thread to terminate (UNLOADING flag and kthread_stop). On setting the UNLOADING flag when dpc_thread happens to run at the time and sees the flag, this causes dpc_thread to exit and clean up itself. When kthread_stop is called for final cleanup, this causes use after free. Remove UNLOADING signal to terminate dpc_thread. Use the kthread_stop as the main signal to exit dpc_thread. [596663.812935] kernel BUG at mm/slub.c:294! [596663.812950] invalid opcode: 0000 [#1] SMP PTI [596663.812957] CPU: 13 PID: 1475935 Comm: rmmod Kdump: loaded Tainted: G IOE --------- - - 4.18.0-240.el8.x86_64 #1 [596663.812960] Hardware name: HP ProLiant DL380p Gen8, BIOS P70 08/20/2012 [596663.812974] RIP: 0010:__slab_free+0x17d/0x360 ... [596663.813008] Call Trace: [596663.813022] ? __dentry_kill+0x121/0x170 [596663.813030] ? _cond_resched+0x15/0x30 [596663.813034] ? _cond_resched+0x15/0x30 [596663.813039] ? wait_for_completion+0x35/0x190 [596663.813048] ? try_to_wake_up+0x63/0x540 [596663.813055] free_task+0x5a/0x60 [596663.813061] kthread_stop+0xf3/0x100 [596663.813103] qla2x00_remove_one+0x284/0x440 [qla2xxx]

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu134 products
  • linuxAll versions (No fix recorded) | < 5.15.0-135.146 | < 6.8.0-58.60
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1080.87 | < 6.8.0-1027.29
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0, < 12f04fc8580eafb0510f805749553eb6213f323e | ≥ a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0, < ca36d9d53745d5ec8946ef85006d4da605ea7c54 | ≥ a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0, < b3e6f25176f248762a24d25ab8cf8c5e90874f80 | ≥ a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0, < 15369e774f27ec790f207de87c0b541e3f90b22d | ≥ a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0, < 6abf16d3c915b2feb68c1c8b25fcb71b13f98478 | ≥ a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0, < 07c903db0a2ff84b68efa1a74a4de353ea591eb0 | 4.8
  • linux_kernel< 5.10.231 | ≥ 5.11, < 5.15.174 | ≥ 5.16, < 6.1.120 | ≥ 6.2, < 6.6.66 | ≥ 6.7, < 6.12.5 | 6.13:rc1
Debian1 product
  • linux< 6.1.123-1 | < 6.12.5-1

3 vendors · 137 products

References

38 links
Show all 38 references