tracing: Fix subbuf resize races with trace_pipe_raw readers
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix subbuf resize races with trace_pipe_raw readers Concurrent subbuffer resizes may crash trace_pipe_raw readers or leak uninitialized memory to userspace due to stale size values. Modify ring_buffer_alloc_read_page() to handle the resizing of an existing buffer_data_read_page if necessary and add a new ring_buffer_read_page_size(). This new function enables ring-buffer buffer_data_read_page users to not call the racy ring_buffer_subbuf_size_get(). This makes the spare_size member of ftrace_buffer_info redundant. Finally, handle buffer_data_read_page/reader_page order discrepancy in ring_buffer_read_page(). On a mismatch simply copy manually the data to the buffer_data_read_page.
CVE-2026-98032
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98032
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bce761d757452ba5eb77e11fecc37a04b67494e7",
"lessThan": "574efd988d116bd56ac688ab2d64e06ba0da982a",
"versionType": "git"
},
{
"status": "affected",
"version": "bce761d757452ba5eb77e11fecc37a04b67494e7",
"lessThan": "3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3",
"versionType": "git"
},
{
"status": "affected",
"version": "bce761d757452ba5eb77e11fecc37a04b67494e7",
"lessThan": "75b37b8369778b69ce9738d1c97685a1615cb252",
"versionType": "git"
},
{
"status": "affected",
"version": "bce761d757452ba5eb77e11fecc37a04b67494e7",
"lessThan": "dae8dda341d2d9034a90d59e8a7d502e1263813f",
"versionType": "git"
}
],
"programFiles": [
"include/linux/ring_buffer.h",
"kernel/trace/ring_buffer.c",
"kernel/trace/ring_buffer_benchmark.c",
"kernel/trace/trace.c",
"kernel/trace/trace.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/ring_buffer.h",
"kernel/trace/ring_buffer.c",
"kernel/trace/ring_buffer_benchmark.c",
"kernel/trace/trace.c",
"kernel/trace/trace.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98032
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48830 · Revision 1
- Added to Heist Feed
- Publisher date