CVE-2025-38465
published 2025-07-25CVE-2025-38465: In the Linux kernel, the following vulnerability has been resolved: netlink: Fix wraparounds of sk->sk_rmem_alloc. Netlink has this pattern in some places if…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
In the Linux kernel, the following vulnerability has been resolved:
netlink: Fix wraparounds of sk->sk_rmem_alloc.
Netlink has this pattern in some places
if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)
atomic_add(skb->truesize, &sk->sk_rmem_alloc);
, which has the same problem fixed by commit 5a465a0da13e ("udp:
Fix multiple wraparounds of sk->sk_rmem_alloc.").
For example, if we set INT_MAX to SO_RCVBUFFORCE, the condition
is always false as the two operands are of int.
Then, a single socket can eat as many skb as possible until OOM
happens, and we can see multiple wraparounds of sk->sk_rmem_alloc.
Let's fix it by using atomic_add_return() and comparing the two
variables as unsigned int.
Before:
[root@fedora ~]# ss -f netlink
Recv-Q Send-Q Local Address:Port Peer Address:Port
-1668710080 0 rtnl:nl_wraparound/293 *
After:
[root@fedora ~]# ss -f netlink
Recv-Q Send-Q Local Address:Port Peer Address:Port
2147483072 0 rtnl:nl_wraparound/290 *
^
`--- INT_MAX - 576
Affected
39 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9da025150b7c14a8390fc06aea314c0a4011e82c | 9da025150b7c14a8390fc06aea314c0a4011e82c |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98 | c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd69af06101090eaa60b3d216ae715f9c0a58e5b | fd69af06101090eaa60b3d216ae715f9c0a58e5b |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 76602d8e13864524382b0687dc32cd8f19164d5a | 76602d8e13864524382b0687dc32cd8f19164d5a |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 55baecb9eb90238f60a8350660d6762046ebd3bd | 55baecb9eb90238f60a8350660d6762046ebd3bd |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4b8e18af7bea92f8b7fb92d40aeae729209db250 | 4b8e18af7bea92f8b7fb92d40aeae729209db250 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cd7ff61bfffd7000143c42bbffb85eeb792466d6 | cd7ff61bfffd7000143c42bbffb85eeb792466d6 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc | ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.147-1 | 6.1.147-1 |
| linux | linux_kernel | >= 0 < 6.12.41-1 | 6.12.41-1 |
| linux | linux_kernel | >= 0 < 6.16.3-1 | 6.16.3-1 |
| linux | linux_kernel | >= 0 < 5.15.0-156.166 | 5.15.0-156.166 |
| linux | linux_kernel | >= 0 < 6.8.0-100.100 | 6.8.0-100.100 |
| linux | linux_kernel | >= 2.6.13 < 5.4.296 | 5.4.296 |
| linux | linux_kernel | >= 5.11 < 5.15.189 | 5.15.189 |
| linux | linux_kernel | >= 5.16 < 6.1.146 | 6.1.146 |
| linux | linux_kernel | >= 5.5 < 5.10.240 | 5.10.240 |
| linux | linux_kernel | >= 6.13 < 6.15.7 | 6.15.7 |
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