Withdrawn: this CVE is not a vulnerability
The assigning CNA withdrew CVE-2026-64158 on 19 August 2026, and it carries the Rejected state at CVE.org and NVD. It must not be treated as a live finding. Its pre-withdrawal severity, score and exploitability are withheld below; the record itself is kept because withdrawals are reversible and because the reject reason is the correction worth publishing.
WITHDRAWN
CVE-2026-64158
netfs: Fix write streaming disablement if fd open O_RDWR
Overview
Description
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Details
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
Aug. 19, 2026, 7:16 a.m.
Remotely Exploit :
—
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64158 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64158 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Rejected by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 19, 2026
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 19, 2026
Action Type Old Value New Value Changed Description In the Linux kernel, the following vulnerability has been resolved: netfs: Fix write streaming disablement if fd open O_RDWR In netfs_perform_write(), "write streaming" (the caching of dirty data in dirty but !uptodate folios) is performed to avoid the need to read data that is just going to get immediately overwritten. However, this is/will be disabled in three circumstances: if the fd is open O_RDWR, if fscache is in use (as we need to round out the blocks for DIO) or if content encryption is enabled (again for rounding out purposes). The idea behind disabling it if the fd is open O_RDWR is that we'd need to flush the write-streaming page before we could read the data, particularly through mmap. But netfs now fills in the gaps if ->read_folio() is called on the page, so that is unnecessary. Further, this doesn't actually work if a separate fd is open for reading. Fix this by removing the check for O_RDWR, thereby allowing streaming writes even when we might read. This caused a number of problems with the generic/522 xfstest, but those are now fixed. Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. Removed CVSS V3.1 kernel.org: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L Removed CWE NIST: NVD-CWE-noinfo Removed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8 up to (excluding) 6.12.92 Removed Reference kernel.org: https://git.kernel.org/stable/c/616578e40dcba3f94810d841c5a52b7e3bc8ede7 Removed Reference kernel.org: https://git.kernel.org/stable/c/70a7b9193bbbfceaab5974de66834c64ccc875dd Removed Reference kernel.org: https://git.kernel.org/stable/c/7a9fa5b020a3a40f8291a71cd44c08d931da430d Removed Reference kernel.org: https://git.kernel.org/stable/c/9adf8e47d73d5e3c2fe77dea649dcde350ccd65c Removed Reference Type kernel.org: https://git.kernel.org/stable/c/616578e40dcba3f94810d841c5a52b7e3bc8ede7 Types: Patch Removed Reference Type kernel.org: https://git.kernel.org/stable/c/70a7b9193bbbfceaab5974de66834c64ccc875dd Types: Patch Removed Reference Type kernel.org: https://git.kernel.org/stable/c/7a9fa5b020a3a40f8291a71cd44c08d931da430d Types: Patch Removed Reference Type kernel.org: https://git.kernel.org/stable/c/9adf8e47d73d5e3c2fe77dea649dcde350ccd65c Types: Patch Removed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '9adf8e47d73d5e3c2fe77dea649dcde350ccd65c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '616578e40dcba3f94810d841c5a52b7e3bc8ede7', 'versionType': 'git'}, {'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '7a9fa5b020a3a40f8291a71cd44c08d931da430d', 'versionType': 'git'}, {'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '70a7b9193bbbfceaab5974de66834c64ccc875dd', 'versionType': 'git'}], 'programFiles': ['fs/netfs/buffered_write.c'], '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': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/netfs/buffered_write.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Aug. 17, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8 up to (excluding) 6.12.92 Added Reference Type kernel.org: https://git.kernel.org/stable/c/616578e40dcba3f94810d841c5a52b7e3bc8ede7 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/70a7b9193bbbfceaab5974de66834c64ccc875dd Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7a9fa5b020a3a40f8291a71cd44c08d931da430d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9adf8e47d73d5e3c2fe77dea649dcde350ccd65c Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '9adf8e47d73d5e3c2fe77dea649dcde350ccd65c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '616578e40dcba3f94810d841c5a52b7e3bc8ede7', 'versionType': 'git'}, {'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '7a9fa5b020a3a40f8291a71cd44c08d931da430d', 'versionType': 'git'}, {'status': 'affected', 'version': 'c38f4e96e605f17990e871214e6ea1496bc4e65f', 'lessThan': '70a7b9193bbbfceaab5974de66834c64ccc875dd', 'versionType': 'git'}], 'programFiles': ['fs/netfs/buffered_write.c'], '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': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/netfs/buffered_write.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: netfs: Fix write streaming disablement if fd open O_RDWR In netfs_perform_write(), "write streaming" (the caching of dirty data in dirty but !uptodate folios) is performed to avoid the need to read data that is just going to get immediately overwritten. However, this is/will be disabled in three circumstances: if the fd is open O_RDWR, if fscache is in use (as we need to round out the blocks for DIO) or if content encryption is enabled (again for rounding out purposes). The idea behind disabling it if the fd is open O_RDWR is that we'd need to flush the write-streaming page before we could read the data, particularly through mmap. But netfs now fills in the gaps if ->read_folio() is called on the page, so that is unnecessary. Further, this doesn't actually work if a separate fd is open for reading. Fix this by removing the check for O_RDWR, thereby allowing streaming writes even when we might read. This caused a number of problems with the generic/522 xfstest, but those are now fixed. Added Reference https://git.kernel.org/stable/c/616578e40dcba3f94810d841c5a52b7e3bc8ede7 Added Reference https://git.kernel.org/stable/c/70a7b9193bbbfceaab5974de66834c64ccc875dd Added Reference https://git.kernel.org/stable/c/7a9fa5b020a3a40f8291a71cd44c08d931da430d Added Reference https://git.kernel.org/stable/c/9adf8e47d73d5e3c2fe77dea649dcde350ccd65c
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being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.