CVE-2026-45838
bpf: fix end-of-list detection in cgroup_storage_get_next_key()
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.
INFO
Published Date :
May 27, 2026, 11:16 a.m.
Last Modified :
June 26, 2026, 7:09 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Apply the provided Linux kernel patch.
- Verify the patch resolves the issue.
- Update the system to the patched kernel version.
Public PoC/Exploit Available at Github
CVE-2026-45838 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45838.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45838 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45838
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45838 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45838 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': '0f3d9dd5e1fd52b39e25328307c6a694e994ffe3', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': '26d3339e465e54107bd85884341d1609c5300d6a', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': '2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': 'b4b5a20bed82130da2f2818f04d52378952fbd0b', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': '85a2f30e40f7468db732f55659bc6318874f49af', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': '32ce55d424395904986f5066f8755f6cb9993377', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': 'fc39753b7f92e09177777e9c648afe5aa3abb81f', 'versionType': 'git'}, {'status': 'affected', 'version': 'de9cbbaadba5adf88a19e46df61f7054000838f6', 'lessThan': '5828b9e5b272ecff7cf5d345128d3de7324117f7', 'versionType': 'git'}], 'programFiles': ['kernel/bpf/local_storage.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/bpf/local_storage.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 Added Reference https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a Added Reference https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries. Added Reference https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377 Added Reference https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7 Added Reference https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af Added Reference https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b Added Reference https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f