In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix buffer head management in ocfs2_read_blocks()
In ocfs2_read_blocks(), caller should't assume that buffer head returned
by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops
b_count from 1 to 0. If it is not so, buffer head remains on hold and
likely to be returned by the next call to 'sb_getblk()' unchanged - that
is, with BH_Uptodate bit set even if it has failed validation previously,
thus allowing to insert that buffer head into OCFS2 metadata cache and
submit it to upper layers. To avoid such a scenario, BH_Uptodate should
be cleared immediately after 'validate()' callback has detected some data
inconsistency.
ocfs2: fix buffer head management in ocfs2_read_blocks()
In ocfs2_read_blocks(), caller should't assume that buffer head returned
by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops
b_count from 1 to 0. If it is not so, buffer head remains on hold and
likely to be returned by the next call to 'sb_getblk()' unchanged - that
is, with BH_Uptodate bit set even if it has failed validation previously,
thus allowing to insert that buffer head into OCFS2 metadata cache and
submit it to upper layers. To avoid such a scenario, BH_Uptodate should
be cleared immediately after 'validate()' callback has detected some data
inconsistency.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||
| Linux | Linux | affected |
|
No data.
No data.
OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.
| Vendors | Products |
|---|---|
|
Linux
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|
Linux Kernel
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|
Advisories
| Source | ID | Title |
|---|---|---|
 Ubuntu USN |
USN-8875-1 | Linux kernel vulnerabilities |
| Ubuntu USN |
USN-8877-1 | Linux kernel (GCP) vulnerabilities |
| Ubuntu USN |
USN-8878-1 | Linux kernel (GCP) vulnerabilities |
| Ubuntu USN |
USN-8879-1 | Linux kernel (Oracle) vulnerabilities |
| Ubuntu USN |
USN-8887-1 | Linux kernel vulnerabilities |
| Ubuntu USN |
USN-8888-1 | Linux kernel (Azure) vulnerabilities |
| Ubuntu USN |
USN-8889-1 | Linux kernel (OEM) vulnerabilities |
| Ubuntu USN |
USN-8887-2 | Linux kernel (AWS) vulnerabilities |
| Ubuntu USN |
USN-8888-2 | Linux kernel (Azure) vulnerabilities |
| Ubuntu USN |
USN-8875-2 | Linux kernel (NVIDIA) vulnerabilities |
| Ubuntu USN |
USN-8887-3 | Linux kernel vulnerabilities |
| Ubuntu USN |
USN-8917-1 | Linux kernel vulnerabilities |
| Ubuntu USN |
USN-8918-1 | Linux kernel (Azure) vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 04 Sep 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-665 CWE-775 |
Fri, 04 Sep 2026 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix buffer head management in ocfs2_read_blocks() In ocfs2_read_blocks(), caller should't assume that buffer head returned by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops b_count from 1 to 0. If it is not so, buffer head remains on hold and likely to be returned by the next call to 'sb_getblk()' unchanged - that is, with BH_Uptodate bit set even if it has failed validation previously, thus allowing to insert that buffer head into OCFS2 metadata cache and submit it to upper layers. To avoid such a scenario, BH_Uptodate should be cleared immediately after 'validate()' callback has detected some data inconsistency. | |
| Title | ocfs2: fix buffer head management in ocfs2_read_blocks() | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
Projects
Sign in to view the affected projects.
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-04T16:49:11.758Z
Reserved: 2026-08-26T14:34:25.799Z
Link: CVE-2026-80881
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-04T17:17:00.390
Modified: 2026-09-04T17:17:00.390
Link: CVE-2026-80881
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-05T01:15:14Z