ocfs2: fix missing metadata reservation for large xattrs
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] ocfs2_calc_xattr_set_need() never reserves metadata blocks for a new xattr value's extent tree when the file already has an external xattr block. The not_found path leaves meta_add at zero, so meta_ac is NULL when ocfs2_xattr_extend_allocation() 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 meta_ac is NULL, ocfs2_add_clusters_in_btree() returns RESTART_META, and ocfs2_xattr_extend_allocation() hits BUG_ON(why == RESTART_META). [FIX] The case where no xattr block exists yet already calls ocfs2_extend_meta_needed(&def_xv.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 BUG_ON with a -ENOSPC return so that if RESTART_META is returned despite the reservation, the error propagates to userspace instead of panicking the kernel.
CVE-2026-80809
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-2026-80809
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": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "743ac908282ac97ef6e73ac3a92df2cc8ecb7479",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "04ba24bce61c917b5b3009f0db470cbb72e26a0d",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "b4663405ae29d36011cd712d243456f3f9ab700d",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "6a009f1e61b11d9e23d3c5aa1dacfb010945da45",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "6176313622e34fa3e2b66b9d0682d1e1c6b365c5",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "a3ccb57086dd7652d5ecb826486144198a98a8e9",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "50f0cbec45b0f3fd7e1263d01916518dbf31eb3f",
"versionType": "git"
},
{
"status": "affected",
"version": "a78f9f4668949a6588b8872f162e86685c63d023",
"lessThan": "0cdc7dde00ec63ac714271fa8b2918d630b8da1a",
"versionType": "git"
},
{
"status": "affected",
"version": "92f61d8a31e270f9391e7bcc0ac638bd4262a8e0",
"versionType": "git"
},
{
"status": "affected",
"version": "2.6.34.2",
"lessThan": "2.6.35",
"versionType": "semver"
}
],
"programFiles": [
"fs/ocfs2/xattr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.35"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.35",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.267",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.218",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.185",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.154",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.106",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ocfs2/xattr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80809
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34826 · Revision 1
- Added to Heist Feed
- Publisher date