net: hns3: fix double free issue for tx spare buffer
Summary
| CVE | CVE-2026-45891 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 14:17:03 UTC |
| Updated | 2026-05-27 14:48:31 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.000240000 probability, percentile 0.073320000 (date 2026-06-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 fb6a4c376d454b425555b1b0bda36e99f56ec307 git | Not specified |
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 43015461662d41dcfb3bb95fadd8a2a42ad8eacf git | Not specified |
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 6dc10494cfe27b6f1e9adb7e293293ae39c50b7c git | Not specified |
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 d2c785733dfb853ea0b53984c75662a1af230a94 git | Not specified |
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 fdbccddb7e7822016601829f95de4008e193f7bc git | Not specified |
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 c3659273860bed0c8e573b865e3769abc51225a8 git | Not specified |
| CNA | Linux | Linux | affected 907676b130711fd1f627824559e92259db2061d1 6d2f142b1e4b203387a92519d9d2e34752a79dbb git | Not specified |
| CNA | Linux | Linux | affected 5.14 | Not specified |
| CNA | Linux | Linux | unaffected 5.14 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.202 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.165 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.128 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.75 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.14 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.4 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/fb6a4c376d454b425555b1b0bda36e99f56ec307 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d2c785733dfb853ea0b53984c75662a1af230a94 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c3659273860bed0c8e573b865e3769abc51225a8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fdbccddb7e7822016601829f95de4008e193f7bc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6d2f142b1e4b203387a92519d9d2e34752a79dbb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6dc10494cfe27b6f1e9adb7e293293ae39c50b7c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/43015461662d41dcfb3bb95fadd8a2a42ad8eacf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.