** Information type changed from Private Security to Public Security
** Changed in: linux-bluefield (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2109993
Title:
linux-bluefield is vulnerable to CVE-2025-21857
Status in linux-bluefield package in Ubuntu:
Confirmed
Bug description:
Currently linux-bluefield is vulnerable to
https://ubuntu.com/security/CVE-2025-21857.
I encountered instances of this on several hundred BF3 cards that
crashed over time with a null pointer dereference causing outages.
The latest Bluefield image builds are affected
https://github.com/Mellanox/bfb-build/blob/9e80eb358e7bb9e62328039745cc43d69eefc64a/ubuntu/22.04/Dockerfile#L33-L46
(bf-bundle-2.10.0-147_25.01_ubuntu-22.04)
The unpatched function in linux-bluefield:
https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-bluefield/+git/jammy/tree/net/sched/cls_api.c?h=master-next#n99
static int
tcf_exts_miss_cookie_base_alloc(struct tcf_exts *exts, struct tcf_proto *tp,
u32 handle)
{
// ...
if (err)
goto err_xa_alloc;
The upstream one-liner:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3c74b5787caf59bb1e9c5fe0a360643a71eb1e8a
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 8e47e5355be613..4f648af8cfaafe 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -97,7 +97,7 @@ tcf_exts_miss_cookie_base_alloc(struct tcf_exts *exts,
struct tcf_proto *tp,
err = xa_alloc_cyclic(&tcf_exts_miss_cookies_xa, &n->miss_cookie_base,
n, xa_limit_32b, &next, GFP_KERNEL);
- if (err)
+ if (err < 0)
goto err_xa_alloc;
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