CVE-2024-53174

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < e9be26735d055c42543a4d047a769cc6d0fb1504affected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < 02999e135b013d85c6df738746e8e24699befee4affected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < c7dac3af57e38b2054f990e573256d90bf887958affected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < 068c0b50f3f700b94f78850834cd91ae3b34c2c1affected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < acfaf37888e0f0732fb6a50ff093dce6d99994d0affected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < ec305f303bf070b4f6896b7a76009f702956d402affected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < d882e2b7fad3f5e5fac66184a347f408813f654aaffected
LinuxLinuxd48cf356a13073853f19be6ca5ebbecfc2762ebe < 2862eee078a4d2d1f584e7f24fa50dddfa5f3471affected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux5.4.287 <= 5.4.*unaffected
LinuxLinux5.10.231 <= 5.10.*unaffected
LinuxLinux5.15.174 <= 5.15.*unaffected
LinuxLinux6.1.120 <= 6.1.*unaffected
LinuxLinux6.6.64 <= 6.6.*unaffected
LinuxLinux6.11.11 <= 6.11.*unaffected
LinuxLinux6.12.2 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References