7.8
HIGH
CVSS 3.1
CVE-2026-74305
bpf: Tighten cgroup storage cookie checks for prog arrays
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Tighten cgroup storage cookie checks for prog arrays The fix in commit abad3d0bad72 ("bpf: Fix oob access in cgroup local storage") is still incomplete. The prog-array compatibility check treats a program with no cgroup storage as compatible with any stored storage cookie. This allows a storage-less program to bridge a tail call chain between an entry program and a storage-using callee even though cgroup local storage at runtime still follows the caller's context, that is, A -> B(no storage) -> C(storage) path. Requiring exact cookie equality would break the legitimate case of a storage-less leaf program being tail called from a storage-using one. Instead, only accept a zero storage cookie if the program cannot perform tail calls itself. This keeps A -> B(no storage) working while rejecting the A -> B(no storage) -> C(storage) bridge.
Details
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Apply kernel updates to correctly validate cgroup storage cookie compatibility for prog arrays.
- Update the Linux kernel to the latest patched version.
- Verify cgroup storage cookie validation logic.
- Test tail call compatibility after patching.
References
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information, practical solutions, and valuable tools related to
CVE-2026-74305.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74305 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
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stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74305
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74305 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74305 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.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1c74584b9b4043c52e41fec415226e582d266a3', 'lessThan': '87177497cca90bf4fcfb759eb898560eb5b46a10', 'versionType': 'git'}, {'status': 'affected', 'version': '66da7cee78590259b400e51a70622ccd41da7bb2', 'lessThan': '1c762d28698483ce7c372091f34d86e4d4828652', 'versionType': 'git'}, {'status': 'affected', 'version': '7acfa07c585e3d7a64654d38f0a5c762877d0b9b', 'lessThan': 'eb73056ce2a6f101ddd3bdba89af6b24ebffff85', 'versionType': 'git'}, {'status': 'affected', 'version': '41688d1fc5d163a6c2c0e95c0419e2cb31a44648', 'lessThan': '9ca06849c4239aa2d580c54651f8588c51cb398b', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': '46fbafe3d2d569d828e8d24a7dbe1659f63685cf', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': 'cb22dc79528eb26a46d346c3118dbd6b14c70609', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': '10627ddc0167aab5c1c390a10ef461e9937aba08', 'versionType': 'git'}, {'status': 'affected', 'version': '19341d5c59e8c7e8528e40f8663e99d67810473c', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.192', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.151', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.105', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.46', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.16.1', 'lessThan': '6.17', 'versionType': 'semver'}], 'programFiles': ['kernel/bpf/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/bpf/core.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1c74584b9b4043c52e41fec415226e582d266a3', 'lessThan': '87177497cca90bf4fcfb759eb898560eb5b46a10', 'versionType': 'git'}, {'status': 'affected', 'version': '66da7cee78590259b400e51a70622ccd41da7bb2', 'lessThan': '1c762d28698483ce7c372091f34d86e4d4828652', 'versionType': 'git'}, {'status': 'affected', 'version': '7acfa07c585e3d7a64654d38f0a5c762877d0b9b', 'lessThan': 'eb73056ce2a6f101ddd3bdba89af6b24ebffff85', 'versionType': 'git'}, {'status': 'affected', 'version': '41688d1fc5d163a6c2c0e95c0419e2cb31a44648', 'lessThan': '9ca06849c4239aa2d580c54651f8588c51cb398b', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': '46fbafe3d2d569d828e8d24a7dbe1659f63685cf', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': 'cb22dc79528eb26a46d346c3118dbd6b14c70609', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': '10627ddc0167aab5c1c390a10ef461e9937aba08', 'versionType': 'git'}, {'status': 'affected', 'version': '19341d5c59e8c7e8528e40f8663e99d67810473c', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.192', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.151', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.105', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.46', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.16.1', 'lessThan': '6.17', 'versionType': 'semver'}], 'programFiles': ['kernel/bpf/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/bpf/core.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 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': 'c1c74584b9b4043c52e41fec415226e582d266a3', 'lessThan': '87177497cca90bf4fcfb759eb898560eb5b46a10', 'versionType': 'git'}, {'status': 'affected', 'version': '66da7cee78590259b400e51a70622ccd41da7bb2', 'lessThan': '1c762d28698483ce7c372091f34d86e4d4828652', 'versionType': 'git'}, {'status': 'affected', 'version': '7acfa07c585e3d7a64654d38f0a5c762877d0b9b', 'lessThan': 'eb73056ce2a6f101ddd3bdba89af6b24ebffff85', 'versionType': 'git'}, {'status': 'affected', 'version': '41688d1fc5d163a6c2c0e95c0419e2cb31a44648', 'lessThan': '9ca06849c4239aa2d580c54651f8588c51cb398b', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': '46fbafe3d2d569d828e8d24a7dbe1659f63685cf', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': 'cb22dc79528eb26a46d346c3118dbd6b14c70609', 'versionType': 'git'}, {'status': 'affected', 'version': 'abad3d0bad72a52137e0c350c59542d75ae4f513', 'lessThan': '10627ddc0167aab5c1c390a10ef461e9937aba08', 'versionType': 'git'}, {'status': 'affected', 'version': '19341d5c59e8c7e8528e40f8663e99d67810473c', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.192', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.151', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.105', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.46', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.16.1', 'lessThan': '6.17', 'versionType': 'semver'}], 'programFiles': ['kernel/bpf/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/bpf/core.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: bpf: Tighten cgroup storage cookie checks for prog arrays The fix in commit abad3d0bad72 ("bpf: Fix oob access in cgroup local storage") is still incomplete. The prog-array compatibility check treats a program with no cgroup storage as compatible with any stored storage cookie. This allows a storage-less program to bridge a tail call chain between an entry program and a storage-using callee even though cgroup local storage at runtime still follows the caller's context, that is, A -> B(no storage) -> C(storage) path. Requiring exact cookie equality would break the legitimate case of a storage-less leaf program being tail called from a storage-using one. Instead, only accept a zero storage cookie if the program cannot perform tail calls itself. This keeps A -> B(no storage) working while rejecting the A -> B(no storage) -> C(storage) bridge. Added Reference https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08 Added Reference https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652 Added Reference https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf Added Reference https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10 Added Reference https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b Added Reference https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609 Added Reference https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.