CVE-2026-46129btrfs: fix double free in create_space_info() error path
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free in create_space_info() error path When kobject_init_and_add() fails, the call chain is: create_space_info() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&space_info->kobj) -> space_info_release() -> kfree(space_info) Then control returns to create_space_info(): btrfs_sysfs_add_space_info_type() returns error -> goto out_free -> kfree(space_info) This causes a double free. Keep the direct kfree(space_info) for the earlier failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Undergoing Analysis | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 20e8f2de3688082eeafeb93c8900485b7542457e – < ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5
- affected 58208907c4044a764dbd8896026283905da6d9be – < c2670ec4aa49ca226bce9776601e0da37502be07
- affected bb4fa4c0b54aae25e55faeda7f78d0c11b8cd618 – < f414b3abbba59ef379a2b3c31f2bdd9358ed5e53
- affected 6cb008f1bb23e023dfe615cca5df14570dfc8da5 – < 9a060970fd7b5e1c561e4ce73cb9949e4269a738
- affected a11224a016d6d1d46a4d9b6573244448a80d4d7f – < dd6ade0fdd59218d71a981ae7c937a304e49209c
- affected a11224a016d6d1d46a4d9b6573244448a80d4d7f – < 3f487be81292702a59ea9dbc4088b3360a50e837
- affected 6.1.162 – < 6.1.175
- affected 6.6.122 – < 6.6.140
- affected 6.12.67 – < 6.12.88
- affected 6.18.7 – < 6.18.30
- affected 6.19
- unaffected < 6.19
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.88 – ≤ 6.12.*
- unaffected 6.18.30 – ≤ 6.18.*
- unaffected 7.0.7 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5 (opens in a new tab)
- https://git.kernel.org/stable/c/c2670ec4aa49ca226bce9776601e0da37502be07 (opens in a new tab)
- https://git.kernel.org/stable/c/f414b3abbba59ef379a2b3c31f2bdd9358ed5e53 (opens in a new tab)
- https://git.kernel.org/stable/c/9a060970fd7b5e1c561e4ce73cb9949e4269a738 (opens in a new tab)
- https://git.kernel.org/stable/c/dd6ade0fdd59218d71a981ae7c937a304e49209c (opens in a new tab)
- https://git.kernel.org/stable/c/3f487be81292702a59ea9dbc4088b3360a50e837 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32888 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46129)Record last updated .