CVE-2025-38312— fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod()
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 96fe6a2109db29cd15b90a093c16e6cb4b19371a< 9027ce4c037b566b658b8939a76326b7125e3627 | affected |
96fe6a2109db29cd15b90a093c16e6cb4b19371a< 610f247f2772e4f92b63442125a1b7ade79898d8 | affected | ||
96fe6a2109db29cd15b90a093c16e6cb4b19371a< 2d63433e8eaa3c91b2948190e395bc67009db0d9 | affected | ||
96fe6a2109db29cd15b90a093c16e6cb4b19371a< 54947530663edcbaaee1314c01fdd8c72861b124 | affected | ||
96fe6a2109db29cd15b90a093c16e6cb4b19371a< ab91647acdf43b984824776559a452212eaeb21a | affected | ||
96fe6a2109db29cd15b90a093c16e6cb4b19371a< b235393b9f43ff86a38ca2bde6372312ea215dc5 | affected | ||
96fe6a2109db29cd15b90a093c16e6cb4b19371a< 53784073cbad18f75583fd3da9ffdfc4d1f05405 | affected | ||
96fe6a2109db29cd15b90a093c16e6cb4b19371a< 3f6dae09fc8c306eb70fdfef70726e1f154e173a | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2025-38312
Vulnerability Information
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Vulnerability Title
fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() In fb_find_mode_cvt(), iff mode->refresh somehow happens to be 0x80000000, cvt.f_refresh will become 0 when multiplying it by 2 due to overflow. It's then passed to fb_cvt_hperiod(), where it's used as a divider -- division by 0 will result in kernel oops. Add a sanity check for cvt.f_refresh to avoid such overflow... Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于fb_cvt_hperiod函数中除以0错误，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-38312
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2025-07-10 · 84 CVEs total
| CVE-2025-38317 | wifi: ath12k: Fix buffer overflow in debugfs | |
| CVE-2025-38328 | jffs2: check jffs2_prealloc_raw_node_refs() result in few other places | |
| CVE-2025-38316 | wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor() | |
| CVE-2025-38315 | Bluetooth: btintel: Check dsbr size from EFI variable | |
| CVE-2025-38314 | virtio-pci: Fix result size returned for the admin command completion | |
| CVE-2025-38310 | seg6: Fix validation of nexthop addresses | |
| CVE-2025-38309 | drm/xe/vm: move xe_svm_init() earlier | |
| CVE-2025-38308 | ASoC: Intel: avs: Fix possible null-ptr-deref when initing hw | |
| CVE-2025-38306 | fs/fhandle.c: fix a race in call of has_locked_children() | |
| CVE-2025-38311 | iavf: get rid of the crit lock | |
| CVE-2025-38318 | perf: arm-ni: Fix missing platform_set_drvdata() | |
| CVE-2025-38319 | drm/amd/pp: Fix potential NULL pointer dereference in atomctrl_initialize_mc_reg_table | |
| CVE-2025-38320 | arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth() | |
| CVE-2025-38321 | smb: Log an error when close_all_cached_dirs fails | |
| CVE-2025-38322 | perf/x86/intel: Fix crash in icl_update_topdown_event() | |
| CVE-2025-38323 | net: atm: add lec_mutex | |
| CVE-2025-38324 | mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). | |
| CVE-2025-38325 | ksmbd: add free_transport ops in ksmbd connection | |
| CVE-2025-38326 | aoe: clean device rq_list in aoedev_downdev() | |
| CVE-2025-38327 | fgraph: Do not enable function_graph tracer when setting funcgraph-args |
Showing top 20 of 84 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
Same vendor: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
V. Comments for CVE-2025-38312
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