CVE-2022-48674

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Source
https://cve.org/CVERecord?id=CVE-2022-48674
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48674.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-48674
Downstream
Related
Published
2024-05-03T14:51:57.294Z
Modified
2026-03-13T06:48:20.067605Z
Severity
  • 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
erofs: fix pcluster use-after-free on UP platforms
Details

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

erofs: fix pcluster use-after-free on UP platforms

During stress testing with CONFIG_SMP disabled, KASAN reports as below:

================================================================== BUG: KASAN: use-after-free in _mutexlock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789

CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: <TASK> .. __mutexlock+0xe5/0xc30 .. zerofsdoreadpage+0x8ce/0x1560 .. zerofsreadahead+0x31c/0x580 .. Freed by task 7787 kasansavestack+0x1e/0x40 kasansettrack+0x20/0x30 kasansetfreeinfo+0x20/0x40 __kasanslabfree+0x10c/0x190 kmemcachefree+0xed/0x380 rcu_core+0x3d5/0xc90 _dosoftirq+0x12d/0x389

Last potentially related work creation: kasansavestack+0x1e/0x40 __kasanrecordauxstack+0x97/0xb0 callrcu+0x3d/0x3f0 erofsshrinkworkstation+0x11f/0x210 erofsshrinkscan+0xdc/0x170 shrinkslab.constprop.0+0x296/0x530 dropslab+0x1c/0x70 dropcachessysctlhandler+0x70/0x80 procsyscallhandler+0x20a/0x2f0 vfswrite+0x555/0x6c0 ksyswrite+0xbe/0x160 dosyscall64+0x3b/0x90

The root cause is that erofsworkgroupunfreeze() doesn't reset to orig_val thus it causes a race that the pcluster reuses unexpectedly before freeing.

Since UP platforms are quite rare now, such path becomes unnecessary. Let's drop such specific-designed path directly instead.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48674.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
73f5c66df3e26ab750cefcb9a3e08c71c9f79cad
Fixed
8ddd001cef5e82d19192e6861068463ecca5f556
Fixed
94c34faaafe7b55adc2d8d881db195b646959b9e
Fixed
2f44013e39984c127c6efedf70e6b5f4e9dcf315
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
08ec9e6892cc792d7f8fe4d13bd8a0e91fb23488
Last affected
78c46113413bea1cc345757112aa2642e0f66de5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48674.json"