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CVE-2024-53097— mm: krealloc: Fix MTE false alarm in __do_krealloc

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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__do_krealloc中引入的问题，导致MTE错误地报告slab-out-of-bounds错误。

EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux c383263ee82a01a5a9bc1a466025ccde39a38cae< 8ebee7565effdeae6085458f8f8463363120a871 affected
a543785856249a5ba8c20468098601c0c33b1224< d02492863023431c31f85d570f718433c22b9311 affected
44f79667fefd52945a44d2a57a2cd3c554d7f4e0< d43f1430d47c22a0727c05b6f156ed25fecdfeb4 affected
f8767d10bcbc2529540eb906906c0058e15cd918< 486aeb5f1855c75dd810c25036134961bd2a6722 affected
e3a9fc1520a6606c6121aca8d6679c6b93de7fd8< 71548fada7ee0eb50cc6ccda82dff010c745f92c affected
3e9a65a38706866bf93e19f5b4936465188add10< 3dfb40da84f26dd35dd9bbaf626a2424565b8406 affected
1a83a716ec233990e1fd5b6fbb1200ade63bf450< 704573851b51808b45dae2d62059d1d8189138a2 affected
73388659ef0eea51747350530afdeadf8809ce9c affected
… +6 more rows
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I. Basic Information for CVE-2024-53097

Vulnerability Information
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Vulnerability Title
mm: krealloc: Fix MTE false alarm in __do_krealloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm: krealloc: Fix MTE false alarm in __do_krealloc This patch addresses an issue introduced by commit 1a83a716ec233 ("mm: krealloc: consider spare memory for __GFP_ZERO") which causes MTE (Memory Tagging Extension) to falsely report a slab-out-of-bounds error. The problem occurs when zeroing out spare memory in __do_krealloc. The original code only considered software-based KASAN and did not account for MTE. It does not reset the KASAN tag before calling memset, leading to a mismatch between the pointer tag and the memory tag, resulting in a false positive. Example of the error: ================================================================== swapper/0: BUG: KASAN: slab-out-of-bounds in __memset+0x84/0x188 swapper/0: Write at addr f4ffff8005f0fdf0 by task swapper/0/1 swapper/0: Pointer tag: [f4], memory tag: [fe] swapper/0: swapper/0: CPU: 4 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12. swapper/0: Hardware name: MT6991(ENG) (DT) swapper/0: Call trace: swapper/0: dump_backtrace+0xfc/0x17c swapper/0: show_stack+0x18/0x28 swapper/0: dump_stack_lvl+0x40/0xa0 swapper/0: print_report+0x1b8/0x71c swapper/0: kasan_report+0xec/0x14c swapper/0: __do_kernel_fault+0x60/0x29c swapper/0: do_bad_area+0x30/0xdc swapper/0: do_tag_check_fault+0x20/0x34 swapper/0: do_mem_abort+0x58/0x104 swapper/0: el1_abort+0x3c/0x5c swapper/0: el1h_64_sync_handler+0x80/0xcc swapper/0: el1h_64_sync+0x68/0x6c swapper/0: __memset+0x84/0x188 swapper/0: btf_populate_kfunc_set+0x280/0x3d8 swapper/0: __register_btf_kfunc_id_set+0x43c/0x468 swapper/0: register_btf_kfunc_id_set+0x48/0x60 swapper/0: register_nf_nat_bpf+0x1c/0x40 swapper/0: nf_nat_init+0xc0/0x128 swapper/0: do_one_initcall+0x184/0x464 swapper/0: do_initcall_level+0xdc/0x1b0 swapper/0: do_initcalls+0x70/0xc0 swapper/0: do_basic_setup+0x1c/0x28 swapper/0: kernel_init_freeable+0x144/0x1b8 swapper/0: kernel_init+0x20/0x1a8 swapper/0: ret_from_fork+0x10/0x20 ==================================================================
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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__do_krealloc中引入的问题，导致MTE错误地报告slab-out-of-bounds错误。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux c383263ee82a01a5a9bc1a466025ccde39a38cae ~ 8ebee7565effdeae6085458f8f8463363120a871 -
Linux Linux 5.10.227 ~ 5.10.230 -

II. Public POCs for CVE-2024-53097

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III. Intelligence Information for CVE-2024-53097

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Patches & Fixes for CVE-2024-53097 (4)

Same Patch Batch · Linux · 2024-11-25 · 6 CVEs total

CVE-2024-53096 7.8 HIGH mm: resolve faulty mmap_region() error path behaviour
CVE-2024-53100 7.8 HIGH nvme: tcp: avoid race between queue_lock lock and destroy
CVE-2024-53099 7.1 HIGH bpf: Check validity of link->type in bpf_link_show_fdinfo()
CVE-2024-53098 drm/xe/ufence: Prefetch ufence addr to catch bogus address
CVE-2024-53101 fs: Fix uninitialized value issue in from_kuid and from_kgid

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-53097

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