CVE-2024-53174SUNRPC: make sure cache entry active before cache_show
- 7.8HighCVSS base score
- 0.26%Exploitation in 30 daysEPSS · top 82% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
Timeline
ID reserved
By Linux
- 38 days later
· 38 days later
Published
- 20 months later
· 20 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < e9be26735d055c42543a4d047a769cc6d0fb1504
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < 02999e135b013d85c6df738746e8e24699befee4
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < c7dac3af57e38b2054f990e573256d90bf887958
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < 068c0b50f3f700b94f78850834cd91ae3b34c2c1
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < acfaf37888e0f0732fb6a50ff093dce6d99994d0
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < ec305f303bf070b4f6896b7a76009f702956d402
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < d882e2b7fad3f5e5fac66184a347f408813f654a
- affected d48cf356a13073853f19be6ca5ebbecfc2762ebe – < 2862eee078a4d2d1f584e7f24fa50dddfa5f3471
- affected 4.20
- unaffected < 4.20
- unaffected 5.4.287 – ≤ 5.4.*
- unaffected 5.10.231 – ≤ 5.10.*
- unaffected 5.15.174 – ≤ 5.15.*
- unaffected 6.1.120 – ≤ 6.1.*
- unaffected 6.6.64 – ≤ 6.6.*
- unaffected 6.11.11 – ≤ 6.11.*
- unaffected 6.12.2 – ≤ 6.12.*
- unaffected 6.13 – ≤ *
References
References10
- https://git.kernel.org/stable/c/e9be26735d055c42543a4d047a769cc6d0fb1504 (opens in a new tab)
- https://git.kernel.org/stable/c/02999e135b013d85c6df738746e8e24699befee4 (opens in a new tab)
- https://git.kernel.org/stable/c/c7dac3af57e38b2054f990e573256d90bf887958 (opens in a new tab)
- https://git.kernel.org/stable/c/068c0b50f3f700b94f78850834cd91ae3b34c2c1 (opens in a new tab)
- https://git.kernel.org/stable/c/acfaf37888e0f0732fb6a50ff093dce6d99994d0 (opens in a new tab)
- https://git.kernel.org/stable/c/ec305f303bf070b4f6896b7a76009f702956d402 (opens in a new tab)
- https://git.kernel.org/stable/c/d882e2b7fad3f5e5fac66184a347f408813f654a (opens in a new tab)
- https://git.kernel.org/stable/c/2862eee078a4d2d1f584e7f24fa50dddfa5f3471 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-51846 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-53174)Record last updated .