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CVE

CVE-2026-41898

rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer
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CVE

CVE-2026-41898

rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer

The FFI trampolines behind SslContextBuilder::setpskclient_callback, setpskserver_callback, setcookiegenerate_cb,  and setstatelesscookiegeneratecb forwarded the user closure's returned usize directly to OpenSSL without checking it against the &mut [u8] that was handed to the closure. This can lead to buffer overflows and other unintended consequences.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3, https://nvd.nist.gov/vuln/detail/CVE-2026-41898, https://github.com/rust-openssl/rust-openssl/pull/2607, https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c, https://github.com/rust-openssl/rust-openssl, https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78

Severity

9.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.8
EPSS Probability
0.00057%
EPSS Percentile
0.17882%
Introduced Version
0.9.24,0
Fix Available
0.10.78,1.10.0-r5,2.7.13-r0,1.0.43-r0,2.1.2-r2,1.10.1-r10,1.0.0-r4,1.29.0-r5,0.14.0-r4,1.3.10-r5,3.4.0-r0,0.8.6-r5,0.14.2-r7,1.0.0-r5,0.55.0-r1,1.28.5-r2,1.29.1-r3

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