CVE-2026-46315: linux
Vulnerability summary
CVE-2026-46315 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 34 · Related 34Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 14-06-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/waitid: clear waitid info before copying it to userspace IORING_OP_WAITID stores its result fields in struct io_waitid::info and later copies them to userspace siginfo. The prep path initializes the request arguments, but it does not initialize info itself. If the wait operation completes without reporting a child event, the common wait code can return without writing wo_info. In that case io_waitid_finish() still copies iw->info to userspace, exposing stale bytes from the reused io_kiocb command storage. Clear the result storage during prep so the io_uring path matches the regular waitid syscall, which uses a zero-initialized struct waitid_info.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.11%
Chance of exploitation in the next 30 days
Percentile
1%
Versus all other CVEs
30-day change
0.00 pp
From 0.11% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu140 products
- linux< 6.8.0-139.139 | All versions (No fix recorded) | < 7.0.0-28.28
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1064.67 | All versions (No fix recorded) | < 7.0.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ f31ecf671ddc498f20219453395794ff2383e06b, < 954518e5a4a5efc5033253f6e36fc7b9f98363a3 | ≥ f31ecf671ddc498f20219453395794ff2383e06b, < b737c6612c60c23b40a9f31749b99e6f61943847 | ≥ f31ecf671ddc498f20219453395794ff2383e06b, < 4d2a0de611ab60d02fc768ae0cd5918b16bd5474 | ≥ f31ecf671ddc498f20219453395794ff2383e06b, < 93d93f5f8da791e98159795c6ef683f45bd95d13 | 6.7
- linux_kernel≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
- linux< 6.12.94-1 | < 7.0.12-1
3 vendors · 143 products
