CVE-2024-46774: powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()
Vulnerability summary
CVE-2024-46774 is a high (CVSS 7.1) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.4% of scored vulnerabilities.
Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 34 · Related 32Timeline
- 18-09-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas() Smatch warns: arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential spectre issue 'args.args' [r] (local cap) The 'nargs' and 'nret' locals come directly from a user-supplied buffer and are used as indexes into a small stack-based array and as inputs to copy_to_user() after they are subject to bounds checks. Use array_index_nospec() after the bounds checks to clamp these values for speculative execution.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
18%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu130 products
- linuxAll versions (No fix recorded) | < 5.15.0-144.157 | < 6.8.0-50.51
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1088.95 | < 6.8.0-1020.22
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d2834ff1d9641a8695a09ea79cd901c7b6d4d05f | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a262c2dc833f2fe1bd5c53a4d899e7077d3b1da9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b137af795399d8b657bad1646c18561530f35ed1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1f1feff02e9da0dd0cdb195c428c42b5f9b6c771 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 68d8156480940b79227d58865ec5d2947b9384a8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0974d03eb479384466d828d65637814bee6b26d7 | 2.6.12
- linux_kernel< 6.10.10
Debian1 product
- linux< 6.1.135-1 | < 6.10.11-1
3 vendors · 133 products
