CVE-2024-56558
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2024
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
nfsd: make sure exp active before svc_export_show
In the Linux kernel, the following vulnerability has been resolved: nfsd: make sure exp active before svc_export_show The function `e_show` was called with protection from RCU. This only ensures that `exp` will not be freed. Therefore, the reference count for `exp` can drop to zero, which will trigger a refcount use-after-free warning when `exp_get` is called. To resolve this issue, use `cache_get_rcu` to ensure that `exp` remains active. ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 3 PID: 819 at lib/refcount.c:25 refcount_warn_saturate+0xb1/0x120 CPU: 3 UID: 0 PID: 819 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> e_show+0x20b/0x230 [nfsd] seq_read_iter+0x589/0x770 seq_read+0x1e5/0x270 vfs_read+0x125/0x530 ksys_read+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | e2fa0d0e327279a8defb87b263cd0bf288fd9261 | Unavailable | None listed |
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | 7fd29d284b55c2274f7a748e6c5f25b4758b8da5 | Unavailable | None listed |
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | 6cefcadd34e3c71c81ea64b899a0daa86314a51a | Unavailable | None listed |
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | 7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ec | Unavailable | None listed |
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | 1cecfdbc6bfc89c516d286884c7f29267b95de2b | Unavailable | None listed |
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | 7365d1f8de63cffdbbaa2287ce0205438e1a922f | Unavailable | None listed |
| bf18f163e89c52e09c96534db45c4274273a0b34 | affected | git | be8f982c369c965faffa198b46060f8853e0f1f0 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.17 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.17 | Unavailable | None listed |
| 5.4.287 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.231 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.174 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.120 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.64 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.4 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |