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CVE-2026-89878— media: s2255: check firmware size before reading trailing marker

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.

在 Linux 内核中，已修复以下漏洞： 媒体：s2255：在读取尾部标记之前检查固件大小 函数会从固件镜像（blob）的最后 8 字节中读取 4 字节的标记和版本信息（即访问 和 ）。如果固件文件长度小于 8 字节， 会发生下溢，导致越界读取。因此，在索引访问之前需要先验证固件大小是否合法。

AI Predicted 7.8 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1204 · User Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 14d962602c8bf86e63c9b9272be1f0360d0a448a< 6f6a5b0b0a84c2de0e152f2841e57bc226db924f affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< 8eca0f85eeb0789be40e637bcf9a21c4265b6c6f affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< ffc27411ea60b8a09f1fea3d664b65210fdeb454 affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< 5626785b0e4665326e4d96736c106161da09b2f0 affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< 3e03f1209c1c8a45a7bc559f4ecd79d9b33f706d affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< 342632a4d8ba3fafc1556deee0b7a48dd7860336 affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< 7d221859ba45d7228d0138c9a3e55bd3bb31e14e affected
14d962602c8bf86e63c9b9272be1f0360d0a448a< 330f2936ab768c7215322a476f033143e8891d28 affected
… +10 more rows
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I. Basic Information for CVE-2026-89878

Vulnerability Information
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Vulnerability Title
media: s2255: check firmware size before reading trailing marker
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: s2255: check firmware size before reading trailing marker s2255_probe() reads a 4-byte marker and version from the last 8 bytes of the firmware blob (fw->data[fw_size - 8] and [fw_size - 4]). If the firmware file is shorter than 8 bytes, fw_size - 8 underflows and the access reads out of bounds. Validate the firmware size before indexing.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 14d962602c8bf86e63c9b9272be1f0360d0a448a ~ 6f6a5b0b0a84c2de0e152f2841e57bc226db924f -
Linux Linux 2.6.28 -

II. Public POCs for CVE-2026-89878

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III. Intelligence Information for CVE-2026-89878

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Other References for CVE-2026-89878 (8)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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