{"id":"CVE-2024-53174","summary":"SUNRPC: make sure cache entry active before cache_show","details":"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 \u003cTASK\u003e\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","modified":"2026-04-02T12:22:56.958351Z","published":"2024-12-27T13:49:18.892Z","related":["SUSE-SU-2025:0117-1","SUSE-SU-2025:0153-1","SUSE-SU-2025:0154-1","SUSE-SU-2025:0289-1","SUSE-SU-2025:0556-1","SUSE-SU-2025:0577-1","SUSE-SU-2025:0577-2","SUSE-SU-2025:20165-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20248-1","SUSE-SU-2025:20249-1","USN-7276-1","USN-7277-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53174.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/02999e135b013d85c6df738746e8e24699befee4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/068c0b50f3f700b94f78850834cd91ae3b34c2c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2862eee078a4d2d1f584e7f24fa50dddfa5f3471"},{"type":"WEB","url":"https://git.kernel.org/stable/c/acfaf37888e0f0732fb6a50ff093dce6d99994d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c7dac3af57e38b2054f990e573256d90bf887958"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d882e2b7fad3f5e5fac66184a347f408813f654a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e9be26735d055c42543a4d047a769cc6d0fb1504"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec305f303bf070b4f6896b7a76009f702956d402"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53174.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53174"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d48cf356a13073853f19be6ca5ebbecfc2762ebe"},{"fixed":"e9be26735d055c42543a4d047a769cc6d0fb1504"},{"fixed":"02999e135b013d85c6df738746e8e24699befee4"},{"fixed":"c7dac3af57e38b2054f990e573256d90bf887958"},{"fixed":"068c0b50f3f700b94f78850834cd91ae3b34c2c1"},{"fixed":"acfaf37888e0f0732fb6a50ff093dce6d99994d0"},{"fixed":"ec305f303bf070b4f6896b7a76009f702956d402"},{"fixed":"d882e2b7fad3f5e5fac66184a347f408813f654a"},{"fixed":"2862eee078a4d2d1f584e7f24fa50dddfa5f3471"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53174.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}