CVE-2024-50222

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Source
https://cve.org/CVERecord?id=CVE-2024-50222
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-50222.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-50222
Downstream
Related
Published
2024-11-09T10:14:33.266Z
Modified
2026-03-09T23:49:14.932281Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP
Details

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

ioviter: fix copypagefromiteratomic() if KMAPLOCALFORCEMAP

generic/077 on x8632 CONFIGDEBUGKMAPLOCALFORCEMAP=y with highmem, on huge=always tmpfs, issues a warning and then hangs (interruptibly):

WARNING: CPU: 5 PID: 3517 at mm/highmem.c:622 kunmaplocalindexed+0x62/0xc9 CPU: 5 UID: 0 PID: 3517 Comm: cp Not tainted 6.12.0-rc4 #2 ... copypagefromiteratomic+0xa6/0x5ec genericperformwrite+0xf6/0x1b4 shmemfilewrite_iter+0x54/0x67

Fix copypagefromiteratomic() by limiting it in that case (include/linux/skbuff.h skbfragmust_loop() does similar).

But going forward, perhaps CONFIGDEBUGKMAPLOCALFORCE_MAP is too surprising, has outlived its usefulness, and should just be removed?

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50222.json",
    "cna_assigner": "Linux"
}
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
908a1ad89466c1febf20bfe0037b84fc66f8a3f8
Fixed
4f7ffa83fa79dd52efbaef366c850aaaae06a469
Fixed
3a303409f271dfe0987b8f79595138340497a32d
Fixed
c749d9b7ebbc5716af7a95f7768634b30d9446ec

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-50222.json"