CVE-2024-26850

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Source
https://cve.org/CVERecord?id=CVE-2024-26850
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26850.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-26850
Downstream
Published
2024-04-17T10:14:20Z
Modified
2026-08-12T03:51:17Z
Summary
mm/debug_vm_pgtable: fix BUG_ON with pud advanced test
Details

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

mm/debug_vm_pgtable: fix BUG_ON with pud advanced test

Architectures like powerpc add debug checks to ensure we find only devmap PUD pte entries. These debug checks are only done with CONFIG_DEBUG_VM. This patch marks the ptes used for PUD advanced test devmap pte entries so that we don't hit on debug checks on architecture like ppc64 as below.

WARNING: CPU: 2 PID: 1 at arch/powerpc/mm/book3s64/radix_pgtable.c:1382 radix__pud_hugepage_update+0x38/0x138 .... NIP [c0000000000a7004] radix__pud_hugepage_update+0x38/0x138 LR [c0000000000a77a8] radix__pudp_huge_get_and_clear+0x28/0x60 Call Trace: [c000000004a2f950] [c000000004a2f9a0] 0xc000000004a2f9a0 (unreliable) [c000000004a2f980] [000d34c100000000] 0xd34c100000000 [c000000004a2f9a0] [c00000000206ba98] pud_advanced_tests+0x118/0x334 [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48 [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388

Also

kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:202! ....

NIP [c000000000096510] pudp_huge_get_and_clear_full+0x98/0x174 LR [c00000000206bb34] pud_advanced_tests+0x1b4/0x334 Call Trace: [c000000004a2f950] [000d34c100000000] 0xd34c100000000 (unreliable) [c000000004a2f9a0] [c00000000206bb34] pud_advanced_tests+0x1b4/0x334 [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48 [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26850.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
27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
Fixed
d2a9510c0e39d06f5544075c13040407bdbf2803
Fixed
eeeddf85fc58d48c58ad916e4ca12363ebd8ab21
Fixed
720da1e593b85a550593b415bf1d79a053133451

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26850.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.6.0
Fixed
6.6.21
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.7.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26850.json"