pNFS: Fix use-after-free in pnfs_update_layout()
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.5%
exploitation probability
0.5%top 60% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
pNFS: Fix use-after-free in pnfs_update_layout()
When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(),
the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds,
pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(),
which still references 'lo'. This results in a use-after-free when the
tracepoint accesses lo's fields.
Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/13e198a90ca4050f4bee8a3f23680389a6563ccchttps://git.kernel.org/stable/c/1f24b8302c77dcaf79c64c073877a3b9f4dd25d2https://git.kernel.org/stable/c/200e7637f4d6a1342987045eea72641524f909dchttps://git.kernel.org/stable/c/2883ddd7542b4437a2ab4908fe2773f690e20889https://git.kernel.org/stable/c/4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98https://git.kernel.org/stable/c/7e37e9b3e82ade881e1798e2f4fcc54aff7793c1https://git.kernel.org/stable/c/9645aaf689aff57427ece3b9fa47d5b5399417f4https://git.kernel.org/stable/c/9c0fb5c09ae5bd68dc0038692af8127029cb0385