CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert
At a glance
- Source
- NVD
- EPSS
- EPSS 0.16 % · percentile 5 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: free mapping node on duplicate reloc root insert __add_reloc_root() allocates a mapping_node before inserting it into rc->reloc_root_tree. If rb_simple_insert() finds an existing entry, it returns the existing rb_node and leaves the newly allocated node unlinked. The error path then returns -EEXIST without freeing the new node. Since the node was never inserted into reloc_root_tree, the later cleanup in put_reloc_control() cannot find it either. Free the newly allocated node before returning -EEXIST. The callers currently assert that -EEXIST should not happen, so this is a defensive cleanup for an unexpected duplicate insert path. If the path is ever reached, the local allocation should still be released.
References
- https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33
- https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8
- https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc
- https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43
- https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151
- https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad
- https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872
European references
- ENISA EUVD · EUVD-2026-57056
- GCVE · GCVE-0-2026-68450
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1255 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1231 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1202 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1164 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1069 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 29d9746812d8b7c37d594f484e994fd552c3ec33 ; affected 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8 ; affected 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 92bedc0455552b42ada1a1f42b0e3a8593cdfccc ; affected 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 14a8be9428435ee17f17fae7991215c246b7fd43 ; affected 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 797dc567146c7e3c4f8d9680e4fbc76e0a6d9151 ; affected 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < ae0629ff9ccb836416ada129f4edc7efea6eaaad |
| Linux · Linux | affected 5.13 ; unaffected 0 < 5.13 ; unaffected 5.15.216 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.148 ≤ 6.6.* ; unaffected 6.12.101 ≤ 6.12.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |