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CVE-2024-26883— bpf: Fix stackmap overflow check on 32-bit arches

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，该漏洞源于堆栈映射溢出。

CVSS 7.8 · High EPSS 0.25% · P16

Affected Version Matrix 27

VendorProduct Version RangeStatus
Linux Linux 063c722dd9d285d877e6fd499e753d6224f4c046< d0e214acc59145ce25113f617311aa79dda39cb3 affected
7e3a6b820535eb395784060ae26c5af579528fa0< 21e5fa4688e1a4d3db6b72216231b24232f75c1d affected
8032bf2af9ce26b3a362b9711d15f626ab946a74< 15641007df0f0d35fa28742b25c2a7db9dcd6895 affected
6183f4d3a0a2ad230511987c6c362ca43ec0055f< ca1f06e72dec41ae4f76e7b1a8a97265447b46ae affected
6183f4d3a0a2ad230511987c6c362ca43ec0055f< f06899582ccee09bd85d0696290e3eaca9aa042d affected
6183f4d3a0a2ad230511987c6c362ca43ec0055f< 7070b274c7866a4c5036f8d54fcaf315c64ac33a affected
6183f4d3a0a2ad230511987c6c362ca43ec0055f< 43f798b9036491fb014b55dd61c4c5c3193267d0 affected
6183f4d3a0a2ad230511987c6c362ca43ec0055f< 0971126c8164abe2004b8536b49690a0d6005b0a affected
… +19 more rows
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I. Basic Information for CVE-2024-26883

Vulnerability Information
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Vulnerability Title
bpf: Fix stackmap overflow check on 32-bit arches
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于堆栈映射溢出。
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 063c722dd9d285d877e6fd499e753d6224f4c046 ~ d0e214acc59145ce25113f617311aa79dda39cb3 -
Linux Linux 5.11 -

II. Public POCs for CVE-2024-26883

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III. Intelligence Information for CVE-2024-26883

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Mailing List Discussions for CVE-2024-26883 (2)

Other References for CVE-2024-26883 (8)

Same Patch Batch · Linux · 2024-04-17 · 100 CVEs total

CVE-2024-26877 9.8 CRITICAL crypto: xilinx - call finalize with bh disabled
CVE-2024-26853 9.8 CRITICAL igc: avoid returning frame twice in XDP_REDIRECT
CVE-2024-26828 9.4 CRITICAL cifs: fix underflow in parse_server_interfaces()
CVE-2024-26856 8.8 HIGH net: sparx5: Fix use after free inside sparx5_del_mact_entry
CVE-2024-26822 8.7 HIGH smb: client: set correct id, uid and cruid for multiuser automounts
CVE-2024-26830 8.4 HIGH i40e: Do not allow untrusted VF to remove administratively set MAC
CVE-2024-26824 7.8 HIGH crypto: algif_hash - Remove bogus SGL free on zero-length error path
CVE-2024-26898 7.8 HIGH aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts
CVE-2024-26838 7.8 HIGH RDMA/irdma: Fix KASAN issue with tasklet
CVE-2024-26852 7.8 HIGH net/ipv6: avoid possible UAF in ip6_route_mpath_notify()
CVE-2024-26895 7.8 HIGH wifi: wilc1000: prevent use-after-free on vif when cleaning up all interfaces
CVE-2024-26890 7.8 HIGH Bluetooth: btrtl: fix out of bounds memory access
CVE-2024-26864 7.8 HIGH tcp: Fix refcnt handling in __inet_hash_connect().
CVE-2024-26865 7.8 HIGH rds: tcp: Fix use-after-free of net in reqsk_timer_handler().
CVE-2024-26869 7.8 HIGH f2fs: fix to truncate meta inode pages forcely
CVE-2024-26870 7.8 HIGH NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102
CVE-2024-26872 7.8 HIGH RDMA/srpt: Do not register event handler until srpt device is fully setup
CVE-2024-26885 7.8 HIGH bpf: Fix DEVMAP_HASH overflow check on 32-bit arches
CVE-2024-26884 7.8 HIGH bpf: Fix hashtab overflow check on 32-bit arches
CVE-2024-26880 7.8 HIGH dm: call the resume method on internal suspend

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IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26883

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