{"id":"CVE-2024-53174","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-53174","generatedAt":"2026-10-28T03:25:10.211Z","title":"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.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: make sure cache entry active before cache_show\n\nThe function `c_show` was called with protection from RCU. This only\nensures that `cp` will not be freed. Therefore, the reference count for\n`cp` can drop to zero, which will trigger a refcount use-after-free\nwarning when `cache_get` is called. To resolve this issue, use\n`cache_get_rcu` to ensure that `cp` remains active.\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 7 PID: 822 at lib/refcount.c:25\nrefcount_warn_saturate+0xb1/0x120\nCPU: 7 UID: 0 PID: 822 Comm: cat Not tainted 6.12.0-rc3+ #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n1.16.1-2.fc37 04/01/2014\nRIP: 0010:refcount_warn_saturate+0xb1/0x120\n\nCall Trace:\n <TASK>\n c_show+0x2fc/0x380 [sunrpc]\n seq_read_iter+0x589/0x770\n seq_read+0x1e5/0x270\n proc_reg_read+0xe1/0x140\n vfs_read+0x125/0x530\n ksys_read+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e","published":"2024-12-27T14:15:25.000Z","lastModified":"2026-06-17T08:08:30.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["linux/linux kernel"],"epss":{"score":0.00257,"percentile":0.17177,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/02999e135b013d85c6df738746e8e24699befee4","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/068c0b50f3f700b94f78850834cd91ae3b34c2c1","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2862eee078a4d2d1f584e7f24fa50dddfa5f3471","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/acfaf37888e0f0732fb6a50ff093dce6d99994d0","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c7dac3af57e38b2054f990e573256d90bf887958","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d882e2b7fad3f5e5fac66184a347f408813f654a","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e9be26735d055c42543a4d047a769cc6d0fb1504","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ec305f303bf070b4f6896b7a76009f702956d402","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-53174","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}