Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Fix potential UAF when ddgst mismatch Shivam Kumar found via vulnerability testing: When data digest is enabled on an NVMe/TCP connection and a digest mismatch occurs on a non-final H2C_DATA PDU during an R2T-based data transfer, the digest error handler in nvmet_tcp_try_recv_ddgst() calls nvmet_req_uninit() — which performs percpu_ref_put() on the submission queue — but does NOT mark the command as completed. It does not set cqe->status, does not modify rbytes_done, and does not clear any flag. When the subsequent fatal error triggers queue teardown, nvmet_tcp_uninit_data_in_cmds() iterates all commands, checks nvmet_tcp_need_data_in() for each one, and finds that the already-uninited command still appears to need data (because rbytes_done < transfer_len and cqe->status == 0). It therefore calls nvmet_req_uninit() a second time on the same command — a double percpu_ref_put against a single percpu_ref_get.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 91edfca6f8b364d60cde3ddefaf7d03ddf35774b before dfb902462bca478f050224ec7a7195aafa7643b1; affected fda871c0ba5d2eed2cd1c881573168129da70058 before 7e558308eba14c8136cb1e615f0c850f76d1fc0a; affected fda871c0ba5d2eed2cd1c881573168129da70058 before 96fe2513df590e74b04253a45089cae75569570e; affected fda871c0ba5d2eed2cd1c881573168129da70058 before e091ff83d962f9ed00d9bd70443676de9fe98bdc; affected fda871c0ba5d2eed2cd1c881573168129da70058 before 6f9442983a3e4227afd1c83a5251ddbca585ea21; affected fda871c0ba5d2eed2cd1c881573168129da70058 before 088ee46c18d99baef453afd74181dd40ade044ad; affected fda871c0ba5d2eed2cd1c881573168129da70058 before dbbd07d0a7020b80f6a7028e561908f7b83b3d5a; affected 4b17476d809273617d3317fa0d4ae78aa488d760; affected 5.10.20 before 5.10.265; affected 5.11.3 before 5.12 |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/dfb902462bca478f050224ec7a7195aafa7643b1
- https://git.kernel.org/stable/c/7e558308eba14c8136cb1e615f0c850f76d1fc0a
- https://git.kernel.org/stable/c/96fe2513df590e74b04253a45089cae75569570e
- https://git.kernel.org/stable/c/e091ff83d962f9ed00d9bd70443676de9fe98bdc
- https://git.kernel.org/stable/c/6f9442983a3e4227afd1c83a5251ddbca585ea21
- https://git.kernel.org/stable/c/088ee46c18d99baef453afd74181dd40ade044ad
- https://git.kernel.org/stable/c/dbbd07d0a7020b80f6a7028e561908f7b83b3d5a
ADP enrichment
No English description supplied.
No references supplied.