CVE-2024-57917topology: Keep the cpumask unchanged when printing cpumap
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: topology: Keep the cpumask unchanged when printing cpumap During fuzz testing, the following warning was discovered: different return values (15 and 11) from vsnprintf("%*pbl ", ...) test:keyward is WARNING in kvasprintf WARNING: CPU: 55 PID: 1168477 at lib/kasprintf.c:30 kvasprintf+0x121/0x130 Call Trace: kvasprintf+0x121/0x130 kasprintf+0xa6/0xe0 bitmap_print_to_buf+0x89/0x100 core_siblings_list_read+0x7e/0xb0 kernfs_file_read_iter+0x15b/0x270 new_sync_read+0x153/0x260 vfs_read+0x215/0x290 ksys_read+0xb9/0x160 do_syscall_64+0x56/0x100 entry_SYSCALL_64_after_hwframe+0x78/0xe2 The call trace shows that kvasprintf() reported this warning during the printing of core_siblings_list. kvasprintf() has several steps: (1) First, calculate the length of the resulting formatted string. (2) Allocate a buffer based on the returned length. (3) Then, perform the actual string formatting. (4) Check whether the lengths of the formatted strings returned in steps (1) and (2) are consistent. If the core_cpumask is modified between steps (1) and (3), the lengths obtained in these two steps may not match. Indeed our test includes cpu hotplugging, which should modify core_cpumask while printing. To fix this issue, cache the cpumask into a temporary variable before calling cpumap_print_{list, cpumask}_to_buf(), to keep it unchanged during the printing process.
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from bb9ec13d156e85dfd6a8afd0bb61ccf5736ed257 before 1c7818e2746e747838a3de1687e89eac7b947f08; from bb9ec13d156e85dfd6a8afd0bb61ccf5736ed257 before ca47e933a900492d89dcf5db18a99c28bd4a742d; from bb9ec13d156e85dfd6a8afd0bb61ccf5736ed257 before b02cf1d27e460ab2b3e1c8c9ce472d562cad2e8d; from bb9ec13d156e85dfd6a8afd0bb61ccf5736ed257 before 360596e7fe319a5db1b5fb34a3952862ae53c924; from bb9ec13d156e85dfd6a8afd0bb61ccf5736ed257 before cbd399f78e23ad4492c174fc5e6b3676dba74a52 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.15 before 5.15.177; from 5.16 before 6.1.125; from 6.2 before 6.6.72; from 6.7 before 6.12.10; 6.13; 6.13; 6.13; 6.13; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/1c7818e2746e747838a3de1687e89eac7b947f08patch
- https://git.kernel.org/stable/c/ca47e933a900492d89dcf5db18a99c28bd4a742dpatch
- https://git.kernel.org/stable/c/b02cf1d27e460ab2b3e1c8c9ce472d562cad2e8dpatch
- https://git.kernel.org/stable/c/360596e7fe319a5db1b5fb34a3952862ae53c924patch
- https://git.kernel.org/stable/c/cbd399f78e23ad4492c174fc5e6b3676dba74a52patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.