What’s Vulnerable › Vulnerabilities

CVE-2026-72374: afs: Fix callback service message parsers to pass through -EAGAIN

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: afs: Fix callback service message parsers to pass through -EAGAIN The AFS filesystem client uses an rxrpc server to listen for callback notifications. Each callback call type handler has a delivery function that parses the incoming request stream, and this should return -EAGAIN the last packet hasn't yet been seen, but all currently queued received data is consumed. afs_extract_data() does this, but the -EAGAIN return is switched to 0 inadvertantly Fix callback service message parsers to pass through -EAGAIN

Affected products

• Linux kernel: 4.9 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09c67a7ded481482155b836c8c7f078a3075f8de
• https://git.kernel.org/stable/c/0acbc09d2aca0432af45cec114f20d55ceafaec4
• https://git.kernel.org/stable/c/0f36469d7ce98b362934113c550d08bb0c784231
• https://git.kernel.org/stable/c/239cd337c9d047e7097f5b2ebbb41ddfb8180bc6
• https://git.kernel.org/stable/c/26b737b3769e92493fe94c34620399d93ca231ae
• https://git.kernel.org/stable/c/5a39b145a8fb49f316e7ec1f29ba51d68095c7e4
• https://git.kernel.org/stable/c/772850871a2e772e26f9d93f1e9ddd413b3eeaa4
• https://git.kernel.org/stable/c/f14dd036fad3d359f26f1282199cec06b3a9362b

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