CVE-2026-74305High· 7.8▾ Twilight

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

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-…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score43/ 100 · Moderate

impact 42.9 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Aug 15, 2026

Updated

Oct 16, 2026

CVSS

7.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

43 · Moderate

EPSS

0.18% · p7

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 16.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 62 days

Aug 15, 2026Published
Disclosed via NVD
Oct 16, 2026Record revised
Last analysed / modified upstream
Oct 16, 2026EPSS first tracked
0.2%

Linux #nvd #cve.org

Affected

Linux >= c1c74584b9b4043c52e41fec415226e582d266a3 < 87177497cca90bf4fcfb759eb898560eb5b46a10
Linux >= 66da7cee78590259b400e51a70622ccd41da7bb2 < 1c762d28698483ce7c372091f34d86e4d4828652
Linux >= 7acfa07c585e3d7a64654d38f0a5c762877d0b9b < eb73056ce2a6f101ddd3bdba89af6b24ebffff85
Linux >= 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 < 9ca06849c4239aa2d580c54651f8588c51cb398b
Linux >= abad3d0bad72a52137e0c350c59542d75ae4f513 < 46fbafe3d2d569d828e8d24a7dbe1659f63685cf
Linux >= abad3d0bad72a52137e0c350c59542d75ae4f513 < cb22dc79528eb26a46d346c3118dbd6b14c70609
Linux >= abad3d0bad72a52137e0c350c59542d75ae4f513 < 10627ddc0167aab5c1c390a10ef461e9937aba08
Linux 19341d5c59e8c7e8528e40f8663e99d67810473c
Linux >= 5.15.192 < 5.15.212
Linux >= 6.1.151 < 6.1.178
Linux >= 6.6.105 < 6.6.145
Linux >= 6.12.46 < 6.12.97
Linux >= 6.16.1 < 6.17
Linux 6.17

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org