Answer in brief
CVE-2026-80809 records a Unknown severity vulnerability in ocfs2: fix missing metadata reservation for large xattrs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 2.6.35 | Not reported |
| Linux/Linuxgeneric | >=a78f9f4668949a6588b8872f162e86685c63d023 <743ac908282ac97ef6e73ac3a92df2cc8ecb7479 || >=a78f9f4668949a6588b8872f162e86685c63d023 <04ba24bce61c917b5b3009f0db470cbb72e26a0d || >=a78f9f4668949a6588b8872f162e86685c63d023 <b4663405ae29d36011cd712d243456f3f9ab700d || >=a78f9f4668949a6588b8872f162e86685c63d023 <6a009f1e61b11d9e23d3c5aa1dacfb010945da45 || >=a78f9f4668949a6588b8872f162e86685c63d023 <b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec || >=a78f9f4668949a6588b8872f162e86685c63d023 <6176313622e34fa3e2b66b9d0682d1e1c6b365c5 || >=a78f9f4668949a6588b8872f162e86685c63d023 <a3ccb57086dd7652d5ecb826486144198a98a8e9 || >=a78f9f4668949a6588b8872f162e86685c63d023 <50f0cbec45b0f3fd7e1263d01916518dbf31eb3f || >=a78f9f4668949a6588b8872f162e86685c63d023 <0cdc7dde00ec63ac714271fa8b2918d630b8da1a || 92f61d8a31e270f9391e7bcc0ac638bd4262a8e0 || >=2.6.34.2 <2.6.35 | 743ac908282ac97ef6e73ac3a92df2cc8ecb7479, 04ba24bce61c917b5b3009f0db470cbb72e26a0d, b4663405ae29d36011cd712d243456f3f9ab700d, 6a009f1e61b11d9e23d3c5aa1dacfb010945da45, b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec, 6176313622e34fa3e2b66b9d0682d1e1c6b365c5, a3ccb57086dd7652d5ecb826486144198a98a8e9, 50f0cbec45b0f3fd7e1263d01916518dbf31eb3f, 0cdc7dde00ec63ac714271fa8b2918d630b8da1a, 2.6.35 |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.