CVE-2025-39827
published 2025-09-16CVE-2025-39827: In the Linux kernel, the following vulnerability has been resolved: net: rose: include node references in rose_neigh refcount Current implementation maintains…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
In the Linux kernel, the following vulnerability has been resolved:
net: rose: include node references in rose_neigh refcount
Current implementation maintains two separate reference counting
mechanisms: the 'count' field in struct rose_neigh tracks references from
rose_node structures, while the 'use' field (now refcount_t) tracks
references from rose_sock.
This patch merges these two reference counting systems using 'use' field
for proper reference management. Specifically, this patch adds incrementing
and decrementing of rose_neigh->use when rose_neigh->count is incremented
or decremented.
This patch also modifies rose_rt_free(), rose_rt_device_down() and
rose_clear_route() to properly release references to rose_neigh objects
before freeing a rose_node through rose_remove_node().
These changes ensure rose_neigh structures are properly freed only when
all references, including those from rose_node structures, are released.
As a result, this resolves a slab-use-after-free issue reported by Syzbot.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4cce478c3e82a5fc788d72adb2f4c4e983997639 | 4cce478c3e82a5fc788d72adb2f4c4e983997639 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9c547c8eee9d1cf6e744611d688b9f725cf9a115 | 9c547c8eee9d1cf6e744611d688b9f725cf9a115 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d7563b456ed44151e1a82091d96f60166daea89b | d7563b456ed44151e1a82091d96f60166daea89b |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 384210cceb1873a4c8218b27ba0745444436b728 | 384210cceb1873a4c8218b27ba0745444436b728 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < da9c9c877597170b929a6121a68dcd3dd9a80f45 | da9c9c877597170b929a6121a68dcd3dd9a80f45 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.1.153-1 | 6.1.153-1 |
| linux | linux_kernel | >= 0 < 6.12.48-1 | 6.12.48-1 |
| linux | linux_kernel | >= 0 < 6.16.5-1 | 6.16.5-1 |
| linux | linux_kernel | >= 0 < 6.8.0-106.106 | 6.8.0-106.106 |
| linux | linux_kernel | >= 2.6.12.1 < 6.1.150 | 6.1.150 |
| linux | linux_kernel | >= 6.13 < 6.16.5 | 6.16.5 |
| linux | linux_kernel | >= 6.2 < 6.6.104 | 6.6.104 |
| linux | linux_kernel | >= 6.7 < 6.12.45 | 6.12.45 |
| msrc | azl3_kernel_6.6.96.2-2_on_azure_linux_3.0 | — | — |
| msrc | cbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0 | — | — |
| ubuntu | linux-xilinx | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM