CVE-2024-26710
In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Limit KASAN thread size increase to 32KB KASAN is seen to increase stack usage, to the point that it was reported to lead to stack overflow on some 32-bit machines (see…
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Limit KASAN thread size increase to 32KB KASAN is seen to increase stack usage, to the point that it was reported to lead to stack overflow on some 32-bit machines (see link). To avoid overflows the stack size was doubled for KASAN builds in commit 3e8635fb2e07 ("powerpc/kasan: Force thread size increase with KASAN"). However with a 32KB stack size to begin with, the doubling leads to a 64KB stack, which causes build errors: arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff) Although the asm could be reworked, in practice a 32KB stack seems sufficient even for KASAN builds - the additional usage seems to be in the 2-3KB range for a 64-bit KASAN build. So only increase the stack for KASAN if the stack size is < 32KB.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcbPatch
- https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbePatch
- https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736Patch
- https://git.kernel.org/stable/c/f9a4c401bf4c5af3437ad221c0a5880a518068d4
- https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9Patch
- https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcbPatch
- https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbePatch
- https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.