Description
In the Linux kernel, the following vulnerability has been resolved: media: wl128x: Fix atomicity violation in fmc_send_cmd() Atomicity violation occurs when the fmc_send_cmd() function is executed simultaneously with the modification of the fmdev->resp_skb value. Consider a scenario where, after passing the validity check within the function, a non-null fmdev->resp_skb variable is assigned a null value. This results in an invalid fmdev->resp_skb variable passing the validity check. As seen in the later part of the function, skb = fmdev->resp_skb; when the invalid fmdev->resp_skb passes the check, a null pointer dereference error may occur at line 478, evt_hdr = (void *)skb->data; To address this issue, it is recommended to include the validity check of fmdev->resp_skb within the locked section of the function. This modification ensures that the value of fmdev->resp_skb does not change during the validation process, thereby maintaining its validity. This possible bug is found by an experimental static analysis tool developed by our team. This tool analyzes the locking APIs to extract function pairs that can be concurrently executed, and then analyzes the instructions in the paired functions to identify possible concurrency bugs including data races and atomicity violations.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
e8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < d16109c9fdc1b8cea4fe63b42e06e926c3f68990affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < 3c818ad07e964bca3d27adac1e1f50e1e3c9180eaffectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < d7408a052aa1b4f6fb6f1c7a8877b84017a07ac9affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < ed228b74d8a500380150965d5becabf9a1e33141affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < 372dc9509122e5d45d4c12978e31c3c7d00aaca4affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < 378ce4e08ca2b1ac7bbf1d57b68643ca4226c5f8affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < 2e63c908de357048180516b84740ed62dac0b269affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < 80a3b2ee01eecf22dfa06968b3cde92c691dea10affectede8454ff7b9a4d56f02c095bff12d3c92ef4c7fa6 to < ca59f9956d4519ab18ab2270be47c6b8c6ced091affected
Linux Linux
Default version status: affected
2.6.39affected0 to < 2.6.39unaffected4.19.325 to ≤ 4.19.*unaffected5.4.287 to ≤ 5.4.*unaffected5.10.231 to ≤ 5.10.*unaffected5.15.174 to ≤ 5.15.*unaffected6.1.120 to ≤ 6.1.*unaffected6.6.64 to ≤ 6.6.*unaffected6.11.11 to ≤ 6.11.*unaffected6.12.2 to ≤ 6.12.*unaffected6.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d16109c9fdc1b8cea4fe63b42e06e926c3f68990 ↗
- https://git.kernel.org/stable/c/3c818ad07e964bca3d27adac1e1f50e1e3c9180e ↗
- https://git.kernel.org/stable/c/d7408a052aa1b4f6fb6f1c7a8877b84017a07ac9 ↗
- https://git.kernel.org/stable/c/ed228b74d8a500380150965d5becabf9a1e33141 ↗
- https://git.kernel.org/stable/c/372dc9509122e5d45d4c12978e31c3c7d00aaca4 ↗
- https://git.kernel.org/stable/c/378ce4e08ca2b1ac7bbf1d57b68643ca4226c5f8 ↗
- https://git.kernel.org/stable/c/2e63c908de357048180516b84740ed62dac0b269 ↗
- https://git.kernel.org/stable/c/80a3b2ee01eecf22dfa06968b3cde92c691dea10 ↗
- https://git.kernel.org/stable/c/ca59f9956d4519ab18ab2270be47c6b8c6ced091 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗