CVE-2026-43178
- Source
- https://cve.org/CVERecord?id=CVE-2026-43178
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43178.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-43178
- Downstream
BELL (1)
DEBIAN (1)
UBUNTU (1)
- Related
- Published
- 2026-05-06T11:27:51Z
- Modified
- 2026-11-13T04:02:35Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- procfs: fix possible double mmput() in do_procmap_query()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
procfs: fix possible double mmput() in do_procmap_query()
When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43178.json" }- References
-
- https://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3
- https://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d
- https://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f
- https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43178.json
- https://access.redhat.com/security/cve/CVE-2026-43178
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43178.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-43178
- https://bugzilla.redhat.com/show_bug.cgi?id=2467227
- 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
-
Introducedb9b97e6aeb534315f9646b2090d1a5024c6a4e82Fixedf9fe092084cd04deea18747f58a2304026e76aaa
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedcbc03ce3e6ce7e21214c3f02218213574c1a2d08Fixed8adaff87db143583e08eec4f4e7788f1ef8af94d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedb5cbacd7f86f4f62b8813688c8e73be94e8e1951Fixed90f5e87c9b75833b9ef3a4415b92c0247f28ab2fFixed61dc9f776705d6db6847c101b98fa4f0e9eb6fa3