CVE-2025-39931Medium· 5.5▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Set merge to zero early in af_alg_sendmsg If an error causes af_alg_sendmsg to abort, ctx->merge may contain a garbage value from the previous loop. …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.1%
0.1% → 0.2%
In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Set merge to zero early in af_alg_sendmsg
If an error causes af_alg_sendmsg to abort, ctx->merge may contain a garbage value from the previous loop. This may then trigger a crash on the next entry into af_alg_sendmsg when it attempts to do a merge that can't be done.
Fix this by setting ctx->merge to zero near the start of the loop.
linux_kernel >= 2.6.38, < 6.1.154linux_kernel >= 6.2, < 6.6.108linux_kernel >= 6.7, < 6.12.49linux_kernel >= 6.13, < 6.16.9linux_kernel = 6.17Upgrade past the affected range:
linux_kernel 6.16.9Connected by shared product, vendor, weakness, or advisory.
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