CVE-2026-80809
- Source
- https://cve.org/CVERecord?id=CVE-2026-80809
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80809.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-80809
- Downstream
- Published
- 2026-09-04T15:13:29.769Z
- Modified
- 2026-09-06T03:46:46.257917484Z
- Summary
- ocfs2: fix missing metadata reservation for large xattrs
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix missing metadata reservation for large xattrs
[BUG] lsetxattr() panics the kernel when setting a large xattr value on a fragmented filesystem where the file already has an external xattr block.
[CAUSE] ocfs2calcxattrsetneed() never reserves metadata blocks for a new xattr value's extent tree when the file already has an external xattr block. The notfound path leaves metaadd at zero, so metaac is NULL when ocfs2xattrextendallocation() runs.
A new value root has room for a single extent record. On a fragmented filesystem, the allocator cannot satisfy the xattr value in one contiguous run, so each non-contiguous run requires its own extent record. When the value root's extent list is full and metaac is NULL, ocfs2addclustersinbtree() returns RESTARTMETA, and ocfs2xattrextendallocation() hits BUGON(why == RESTART_META).
[FIX] The case where no xattr block exists yet already calls ocfs2extendmetaneeded(&defxv.xv.xr_list) to reserve value tree metadata. Add the same reservation to the case where an xattr block already exists, making the two cases consistent.
Replace the BUGON with a -ENOSPC return so that if RESTARTMETA is returned despite the reservation, the error propagates to userspace instead of panicking the kernel.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80809.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/04ba24bce61c917b5b3009f0db470cbb72e26a0d
- https://git.kernel.org/stable/c/0cdc7dde00ec63ac714271fa8b2918d630b8da1a
- https://git.kernel.org/stable/c/50f0cbec45b0f3fd7e1263d01916518dbf31eb3f
- https://git.kernel.org/stable/c/6176313622e34fa3e2b66b9d0682d1e1c6b365c5
- https://git.kernel.org/stable/c/6a009f1e61b11d9e23d3c5aa1dacfb010945da45
- https://git.kernel.org/stable/c/743ac908282ac97ef6e73ac3a92df2cc8ecb7479
- https://git.kernel.org/stable/c/a3ccb57086dd7652d5ecb826486144198a98a8e9
- https://git.kernel.org/stable/c/b4663405ae29d36011cd712d243456f3f9ab700d
- https://git.kernel.org/stable/c/b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80809.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-80809
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda78f9f4668949a6588b8872f162e86685c63d023Fixed743ac908282ac97ef6e73ac3a92df2cc8ecb7479Fixed04ba24bce61c917b5b3009f0db470cbb72e26a0dFixedb4663405ae29d36011cd712d243456f3f9ab700dFixed6a009f1e61b11d9e23d3c5aa1dacfb010945da45Fixedb9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ecFixed6176313622e34fa3e2b66b9d0682d1e1c6b365c5Fixeda3ccb57086dd7652d5ecb826486144198a98a8e9Fixed50f0cbec45b0f3fd7e1263d01916518dbf31eb3fFixed0cdc7dde00ec63ac714271fa8b2918d630b8da1a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affected92f61d8a31e270f9391e7bcc0ac638bd4262a8e0
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced2.6.34.2Fixed2.6.35
Affected versions
v2.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced2.6.35Fixed5.10.267
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.218
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.185
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.154
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.106
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.18.47
- Type
- ECOSYSTEM
- Events
-
Introduced6.19.0Fixed7.1.11
- Type
- ECOSYSTEM
- Events
-
Introduced7.2.0Fixed7.2.1