CVE-2026-54875 Affecting libopenssl-3-fips-provider package, versions <3.5.0-150700.5.53.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 Oct 2026
- disclosed2 Oct 2026
Introduced: 2 Oct 2026
NewCVE-2026-54875 (opens in a new tab)How to fix?
Upgrade SLES:15.7 libopenssl-3-fips-provider to version 3.5.0-150700.5.53.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libopenssl-3-fips-provider package and not the libopenssl-3-fips-provider package as distributed by SLES.
See How to fix? for SLES:15.7 relevant fixed versions and status.
Issue summary: A non-constant-time optimized implementation of scalar point multiplication is used for SM2 private key operations on ARM64 and RISC-V platforms.
Impact summary: An attacker able to measure the time taken by, or to observe the cache-line access pattern of SM2 signing or decryption on an affected platform can learn information about the secret scalar.
CWE: CWE-208: Observable Timing Discrepancy
Description: On ARM64 and RISC-V processors, the SM2 curve uses an optimized scalar multiplication implementation whose conditional branches and table look ups are chosen according to the bits of the secret scalar. The execution time and the cache-access pattern therefore depend on the long-term private key (during SM2 decryption) or the per-signature nonce (during SM2 signature generation), forming a timing and cache side-channel.
FIPS Impact: no SM2 is not a FIPS algorithm and the optimized SM2 implementation is not part of the FIPS module.
OpenSSL 4.0, 3.6, 3.5 and 3.4 are vulnerable to this issue on AArch64 and RISC-V.
OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
OpenSSL 4.0 users should upgrade to OpenSSL 4.0.3. OpenSSL 3.6 users should upgrade to OpenSSL 3.6.5. OpenSSL 3.5 users should upgrade to OpenSSL 3.5.9. OpenSSL 3.4 users should upgrade to OpenSSL 3.4.8.
This issue was reported on 2 May 2026 by Abhinav Agarwal. It was independently reported on 6 June 2026 by Feng Xue. The fix was developed by Igor Ustinov.
-- cut (non-publishing metadata for internal use) -- Reported by: Abhinav Agarwal, Feng Xue Fixed by: Igor Ustinov
References
- https://www.suse.com/security/cve/CVE-2026-54875.html
- https://bugzilla.suse.com/1280592
- https://github.com/openssl/openssl/commit/3f01bbc28f7e08211fcdc797fd43816504f94257
- https://github.com/openssl/openssl/commit/469f3e42629f4a0b5631796e20c66c92c138a3e8
- https://github.com/openssl/openssl/commit/9794ed473764839275cb701b4850f3c24d929c28
- https://github.com/openssl/openssl/commit/dddad955d5ff3e9507619cf4e0f13e9988e2197c
- https://openssl-library.org/news/secadv/20260929.txt