CVE-2024-26710 (GCVE-0-2024-26710)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:55 – Updated: 2025-12-23 16:39
VLAI?
Title
powerpc/kasan: Limit KASAN thread size increase to 32KB
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9ccf64e763aca088b0d25c1274af42b1a6a45135 , < f9a4c401bf4c5af3437ad221c0a5880a518068d4 (git)
Affected: b38014874530d3776de75679315e8c1fe04aa89b , < 4cc31fa07445879a13750cb061bb8c2654975fcb (git)
Affected: 58f396513cb1fa4ef91838c78698d458100cc27c , < b29b16bd836a838b7690f80e37f8376414c74cbe (git)
Affected: 18f14afe281648e31ed35c9ad2fcb724c4838ad9 , < f1acb109505d983779bbb7e20a1ee6244d2b5736 (git)
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    Linux Linux Affected: 6.1.75 , < 6.1.76 (semver)
Affected: 6.6.14 , < 6.6.18 (semver)
Affected: 6.7.2 , < 6.7.6 (semver)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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