CVE-2022-50497: binfmt_misc: fix shift-out-of-bounds in check_special_flags
Vulnerability summary
CVE-2022-50497 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.9% of scored vulnerabilities.
Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 4Timeline
- 04-10-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: fix shift-out-of-bounds in check_special_flags UBSAN reported a shift-out-of-bounds warning: left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:106 ubsan_epilogue+0xa/0x44 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds+0x1e7/0x208 lib/ubsan.c:322 check_special_flags fs/binfmt_misc.c:241 [inline] create_entry fs/binfmt_misc.c:456 [inline] bm_register_write+0x9d3/0xa20 fs/binfmt_misc.c:654 vfs_write+0x11e/0x580 fs/read_write.c:582 ksys_write+0xcf/0x120 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x34/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4194e1 Since the type of Node's flags is unsigned long, we should define these macros with same type too.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.16% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu121 products
- linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0f1a48994b3e516d5c7fd5d12204fdba7a604771 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ea6145370be8016755c43aca799815fc4b8c88b1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 97382a2639b1cd9631f6069061e9d7062cd2b098 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 419b808504c26b3e3342365f34ccd0843e09a7f8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < dcbc51d31d0afbd45e830e3cf565a7b3ca7bf0d8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 88cea1676a09f7c45a1438153a126610c33b1590 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a651bb5ff997b9f02662bcdef3d8b4e6f0d79656 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a91123d4bda463469f68f0427adabf8108001f94 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6a46bf558803dd2b959ca7435a5c143efe837217 | 2.6.12
- linux_kernel≥ 2.6.12.1, < 4.9.337 | ≥ 4.10, < 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.163 | ≥ 5.11, < 5.15.86 | ≥ 5.16, < 6.0.16 | ≥ 6.1, < 6.1.2 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5
Debian1 product
- linux< 6.1.4-1
3 vendors · 124 products
