CVE-2024-26775

Summary

In the Linux kernel, the following vulnerability has been resolved:

aoe: avoid potential deadlock at set_capacity

Move set_capacity() outside of the section procected by (&d->lock). To avoid possible interrupt unsafe locking scenario:

    CPU0                    CPU1
    ----                    ----

[1] lock(&bdev->bd_size_lock); local_irq_disable(); [2] lock(&d->lock); [3] lock(&bdev->bd_size_lock); <Interrupt> [4] lock(&d->lock);

*** DEADLOCK ***

Where 1 hold by zram_add()->set_capacity(). [2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc() is trying to acquire 3 at set_capacity() call. In this situation an attempt to acquire [4]lock(&d->lock) from aoecmd_cfg_rsp() will lead to deadlock.

So the simplest solution is breaking lock dependency 2 -> 3 by moving set_capacity() outside.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa782483cc1f875355690625d8253a232f2581418 < 2499fa286fb010ceb289950050199f33c26667b9affected
LinuxLinuxa782483cc1f875355690625d8253a232f2581418 < 2d623c94fbba3554f4446ba6f3c764994e8b0d26affected
LinuxLinuxa782483cc1f875355690625d8253a232f2581418 < 673629018ba04906899dcb631beec34d871f709caffected
LinuxLinuxa782483cc1f875355690625d8253a232f2581418 < 19a77b27163820f793b4d022979ffdca8f659b77affected
LinuxLinuxa782483cc1f875355690625d8253a232f2581418 < e169bd4fb2b36c4b2bee63c35c740c85daeb2e86affected
LinuxLinux5.11affected
LinuxLinux0 < 5.11unaffected
LinuxLinux5.15.189 <= 5.15.*unaffected
LinuxLinux6.1.80 <= 6.1.*unaffected
LinuxLinux6.6.19 <= 6.6.*unaffected
LinuxLinux6.7.7 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References