Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: make sure cache entry active before cache_show The function `c_show` was called with protection from RCU. This only ensures that `cp` will not be freed. Therefore, the reference count for `cp` can drop to zero, which will trigger a refcount use-after-free warning when `cache_get` is called. To resolve this issue, use `cache_get_rcu` to ensure that `cp` remains active. ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 7 PID: 822 at lib/refcount.c:25 refcount_warn_saturate+0xb1/0x120 CPU: 7 UID: 0 PID: 822 Comm: cat Not tainted 6.12.0-rc3+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 RIP: 0010:refcount_warn_saturate+0xb1/0x120 Call Trace: <TASK> c_show+0x2fc/0x380 [sunrpc] seq_read_iter+0x589/0x770 seq_read+0x1e5/0x270 proc_reg_read+0xe1/0x140 vfs_read+0x125/0x530 ksys_read+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before e9be26735d055c42543a4d047a769cc6d0fb1504; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before 02999e135b013d85c6df738746e8e24699befee4; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before c7dac3af57e38b2054f990e573256d90bf887958; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before 068c0b50f3f700b94f78850834cd91ae3b34c2c1; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before acfaf37888e0f0732fb6a50ff093dce6d99994d0; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before ec305f303bf070b4f6896b7a76009f702956d402; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before d882e2b7fad3f5e5fac66184a347f408813f654a; affected d48cf356a13073853f19be6ca5ebbecfc2762ebe before 2862eee078a4d2d1f584e7f24fa50dddfa5f3471 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 5.4.287 through 5.4.*; unaffected 5.10.231 through 5.10.*; unaffected 5.15.174 through 5.15.*; unaffected 6.1.120 through 6.1.*; unaffected 6.6.64 through 6.6.*; unaffected 6.11.11 through 6.11.*; unaffected 6.12.2 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e9be26735d055c42543a4d047a769cc6d0fb1504
- https://git.kernel.org/stable/c/02999e135b013d85c6df738746e8e24699befee4
- https://git.kernel.org/stable/c/c7dac3af57e38b2054f990e573256d90bf887958
- https://git.kernel.org/stable/c/068c0b50f3f700b94f78850834cd91ae3b34c2c1
- https://git.kernel.org/stable/c/acfaf37888e0f0732fb6a50ff093dce6d99994d0
- https://git.kernel.org/stable/c/ec305f303bf070b4f6896b7a76009f702956d402
- https://git.kernel.org/stable/c/d882e2b7fad3f5e5fac66184a347f408813f654a
- https://git.kernel.org/stable/c/2862eee078a4d2d1f584e7f24fa50dddfa5f3471
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.