Description
In the Linux kernel, the following vulnerability has been resolved: can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB can_put_echo_skb() takes ownership of the SKB and it may be freed during or after the call. However, xilinx_can xcan_write_frame() keeps using SKB after the call. Fix that by only calling can_put_echo_skb() after the code is done touching the SKB. The tx_lock is held for the entire xcan_write_frame() execution and also on the can_get_echo_skb() side so the order of operations does not matter. An earlier fix commit 3d3c817c3a40 ("can: xilinx_can: Fix usage of skb memory") did not move the can_put_echo_skb() call far enough. [mkl: add "commit" in front of sha1 in patch description] [mkl: fix indention]
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
1598efe57b3e768056e4ca56cb9cf33111e68d1c to < e202ffd9e54538ef67ec301ebd6d9da4823466c9affected1598efe57b3e768056e4ca56cb9cf33111e68d1c to < 1139321161a3ba5e45e61e0738b37f42f20bc57aaffected1598efe57b3e768056e4ca56cb9cf33111e68d1c to < 94b050726288a56a6b8ff55aa641f2fedbd3b44caffected1598efe57b3e768056e4ca56cb9cf33111e68d1c to < 725b33deebd6e4c96fe7893f384510a54258f28faffected1598efe57b3e768056e4ca56cb9cf33111e68d1c to < 668cc1e3bb21101d074e430de1b7ba8fd10189e7affected1598efe57b3e768056e4ca56cb9cf33111e68d1c to < ef79f00be72bd81d2e1e6f060d83cf7e425deee4affected
Linux Linux
Default version status: affected
4.19affected0 to < 4.19unaffected5.15.194 to ≤ 5.15.*unaffected6.1.153 to ≤ 6.1.*unaffected6.6.107 to ≤ 6.6.*unaffected6.12.48 to ≤ 6.12.*unaffected6.16.8 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e202ffd9e54538ef67ec301ebd6d9da4823466c9 ↗
- https://git.kernel.org/stable/c/1139321161a3ba5e45e61e0738b37f42f20bc57a ↗
- https://git.kernel.org/stable/c/94b050726288a56a6b8ff55aa641f2fedbd3b44c ↗
- https://git.kernel.org/stable/c/725b33deebd6e4c96fe7893f384510a54258f28f ↗
- https://git.kernel.org/stable/c/668cc1e3bb21101d074e430de1b7ba8fd10189e7 ↗
- https://git.kernel.org/stable/c/ef79f00be72bd81d2e1e6f060d83cf7e425deee4 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗