CVE-2026-45891None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: net: hns3: fix double free issue for tx spare buffer In hns3_set_ringparam(), a temporary copy (tmp_rings) of the ring structure is created for rollback. However, the …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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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.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
net: hns3: fix double free issue for tx spare buffer
In hns3_set_ringparam(), a temporary copy (tmp_rings) of the ring structure is created for rollback. However, the tx_spare pointer in the original ring handle is incorrectly left pointing to the old backup memory.
Later, if memory allocation fails in hns3_init_all_ring() during the setup, the error path attempts to free all newly allocated rings. Since tx_spare contains a stale (non-NULL) pointer from the backup, it is mistaken for a newly allocated buffer and is erroneously freed, leading to a double-free of the backup memory.
The root cause is that the tx_spare field was not cleared after its value was saved in tmp_rings, leaving a dangling pointer.
Fix this by setting tx_spare to NULL in the original ring structure
when the creation of the new tx_spare fails. This ensures the
error cleanup path only frees genuinely newly allocated buffers.
Linux >= 907676b130711fd1f627824559e92259db2061d1 < fb6a4c376d454b425555b1b0bda36e99f56ec307Linux >= 907676b130711fd1f627824559e92259db2061d1 < 43015461662d41dcfb3bb95fadd8a2a42ad8eacfLinux >= 907676b130711fd1f627824559e92259db2061d1 < 6dc10494cfe27b6f1e9adb7e293293ae39c50b7cLinux >= 907676b130711fd1f627824559e92259db2061d1 < d2c785733dfb853ea0b53984c75662a1af230a94Linux >= 907676b130711fd1f627824559e92259db2061d1 < fdbccddb7e7822016601829f95de4008e193f7bcLinux >= 907676b130711fd1f627824559e92259db2061d1 < c3659273860bed0c8e573b865e3769abc51225a8Linux >= 907676b130711fd1f627824559e92259db2061d1 < 6d2f142b1e4b203387a92519d9d2e34752a79dbbLinux 5.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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