CVE-2024-56623

scsi: qla2xxx: Fix use after free on unload

State: Published
Severity: 7.8 High
Published: Dec 27, 2024
Updated: May 11, 2026
Reserved: Dec 27, 2024

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]

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 12f04fc8580eafb0510f805749553eb6213f323eAffected a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before ca36d9d53745d5ec8946ef85006d4da605ea7c54Affected a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before b3e6f25176f248762a24d25ab8cf8c5e90874f80Affected a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 15369e774f27ec790f207de87c0b541e3f90b22dAffected a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 6abf16d3c915b2feb68c1c8b25fcb71b13f98478Affected a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 07c903db0a2ff84b68efa1a74a4de353ea591eb0Affected
LinuxLinux	4.8Affected before 4.8Not affected 5.10.231 through 5.10.Not affected 5.15.174 through 5.15.Not affected 6.1.120 through 6.1.Not affected 6.6.66 through 6.6.Not affected 6.12.5 through 6.12.*Not affected 6.13 and laterNot affected

Product

Versions

LinuxLinux

a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 12f04fc8580eafb0510f805749553eb6213f323eAffected
a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before ca36d9d53745d5ec8946ef85006d4da605ea7c54Affected
a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before b3e6f25176f248762a24d25ab8cf8c5e90874f80Affected
a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 15369e774f27ec790f207de87c0b541e3f90b22dAffected
a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 6abf16d3c915b2feb68c1c8b25fcb71b13f98478Affected
a29b3dd7aa14facc902b40b8b5c4dccbfb2ad7d0 to before 07c903db0a2ff84b68efa1a74a4de353ea591eb0Affected

LinuxLinux

4.8Affected
before 4.8Not affected
5.10.231 through 5.10.*Not affected
5.15.174 through 5.15.*Not affected
6.1.120 through 6.1.*Not affected
6.6.66 through 6.6.*Not affected
6.12.5 through 6.12.*Not affected
6.13 and laterNot affected

References

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