Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix use-after-free due to delegation race A delegation break could arrive as soon as we've called vfs_setlease. A delegation break runs a callback which immediately (in nfsd4_cb_recall_prepare) adds the delegation to del_recall_lru. If we then exit nfs4_set_delegation without hashing the delegation, it will be freed as soon as the callback is done with it, without ever being removed from del_recall_lru. Symptoms show up later as use-after-free or list corruption warnings, usually in the laundromat thread. I suspect aba2072f4523 "nfsd: grant read delegations to clients holding writes" made this bug easier to hit, but I looked as far back as v3.0 and it looks to me it already had the same problem. So I'm not sure where the bug was introduced; it may have been there from the beginning.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected dff1399f8addf7129c49bb2227469da79cc30b47 before 04a8d07f3d58308b92630045560799a3faa3ebce; affected dff1399f8addf7129c49bb2227469da79cc30b47 before 348714018139c39533c55661a0c7c990671396b4; affected dff1399f8addf7129c49bb2227469da79cc30b47 before 33645d3e22720cac1e4548f8fef57bf0649536ee; affected dff1399f8addf7129c49bb2227469da79cc30b47 before 2becaa990b93cbd2928292c0b669d3abb6cf06d4; affected dff1399f8addf7129c49bb2227469da79cc30b47 before e0759696de6851d7536efddfdd2dfed4c4df1f09; affected dff1399f8addf7129c49bb2227469da79cc30b47 before eeb0711801f5e19ef654371b627682aed3b11373; affected dff1399f8addf7129c49bb2227469da79cc30b47 before 148c816f10fd11df27ca6a9b3238cdd42fa72cd3; affected dff1399f8addf7129c49bb2227469da79cc30b47 before 548ec0805c399c65ed66c6641be467f717833ab5 |
| Linux / Linux | affected 3.17; unaffected 0 before 3.17; unaffected 4.4.296 through 4.4.*; unaffected 4.9.294 through 4.9.*; unaffected 4.14.259 through 4.14.*; unaffected 4.19.222 through 4.19.*; unaffected 5.4.168 through 5.4.*; unaffected 5.10.85 through 5.10.*; unaffected 5.15.8 through 5.15.*; unaffected 5.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/04a8d07f3d58308b92630045560799a3faa3ebce
- https://git.kernel.org/stable/c/348714018139c39533c55661a0c7c990671396b4
- https://git.kernel.org/stable/c/33645d3e22720cac1e4548f8fef57bf0649536ee
- https://git.kernel.org/stable/c/2becaa990b93cbd2928292c0b669d3abb6cf06d4
- https://git.kernel.org/stable/c/e0759696de6851d7536efddfdd2dfed4c4df1f09
- https://git.kernel.org/stable/c/eeb0711801f5e19ef654371b627682aed3b11373
- https://git.kernel.org/stable/c/148c816f10fd11df27ca6a9b3238cdd42fa72cd3
- https://git.kernel.org/stable/c/548ec0805c399c65ed66c6641be467f717833ab5
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/04a8d07f3d58308b92630045560799a3faa3ebce
- https://git.kernel.org/stable/c/348714018139c39533c55661a0c7c990671396b4
- https://git.kernel.org/stable/c/33645d3e22720cac1e4548f8fef57bf0649536ee
- https://git.kernel.org/stable/c/2becaa990b93cbd2928292c0b669d3abb6cf06d4
- https://git.kernel.org/stable/c/e0759696de6851d7536efddfdd2dfed4c4df1f09
- https://git.kernel.org/stable/c/eeb0711801f5e19ef654371b627682aed3b11373
- https://git.kernel.org/stable/c/148c816f10fd11df27ca6a9b3238cdd42fa72cd3
- https://git.kernel.org/stable/c/548ec0805c399c65ed66c6641be467f717833ab5